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vendor/symfony/config/Tests/ConfigCacheFactoryTest.php

@@ -0,0 +1,29 @@
+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <fabien@symfony.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\Component\Config\Tests;
+
+use PHPUnit\Framework\TestCase;
+use Symfony\Component\Config\ConfigCacheFactory;
+
+class ConfigCacheFactoryTest extends TestCase
+{
+    /**
+     * @expectedException \InvalidArgumentException
+     * @expectedExceptionMessage Invalid type for callback argument. Expected callable, but got "object".
+     */
+    public function testCacheWithInvalidCallback()
+    {
+        $cacheFactory = new ConfigCacheFactory(true);
+
+        $cacheFactory->cache('file', new \stdClass());
+    }
+}

vendor/symfony/config/Tests/ConfigCacheTest.php

@@ -0,0 +1,99 @@
+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <fabien@symfony.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\Component\Config\Tests;
+
+use PHPUnit\Framework\TestCase;
+use Symfony\Component\Config\ConfigCache;
+use Symfony\Component\Config\Tests\Resource\ResourceStub;
+
+class ConfigCacheTest extends TestCase
+{
+    private $cacheFile = null;
+
+    protected function setUp()
+    {
+        $this->cacheFile = tempnam(sys_get_temp_dir(), 'config_');
+    }
+
+    protected function tearDown()
+    {
+        $files = array($this->cacheFile, $this->cacheFile.'.meta');
+
+        foreach ($files as $file) {
+            if (file_exists($file)) {
+                unlink($file);
+            }
+        }
+    }
+
+    /**
+     * @dataProvider debugModes
+     */
+    public function testCacheIsNotValidIfNothingHasBeenCached($debug)
+    {
+        unlink($this->cacheFile); // remove tempnam() side effect
+        $cache = new ConfigCache($this->cacheFile, $debug);
+
+        $this->assertFalse($cache->isFresh());
+    }
+
+    public function testIsAlwaysFreshInProduction()
+    {
+        $staleResource = new ResourceStub();
+        $staleResource->setFresh(false);
+
+        $cache = new ConfigCache($this->cacheFile, false);
+        $cache->write('', array($staleResource));
+
+        $this->assertTrue($cache->isFresh());
+    }
+
+    /**
+     * @dataProvider debugModes
+     */
+    public function testIsFreshWhenNoResourceProvided($debug)
+    {
+        $cache = new ConfigCache($this->cacheFile, $debug);
+        $cache->write('', array());
+        $this->assertTrue($cache->isFresh());
+    }
+
+    public function testFreshResourceInDebug()
+    {
+        $freshResource = new ResourceStub();
+        $freshResource->setFresh(true);
+
+        $cache = new ConfigCache($this->cacheFile, true);
+        $cache->write('', array($freshResource));
+
+        $this->assertTrue($cache->isFresh());
+    }
+
+    public function testStaleResourceInDebug()
+    {
+        $staleResource = new ResourceStub();
+        $staleResource->setFresh(false);
+
+        $cache = new ConfigCache($this->cacheFile, true);
+        $cache->write('', array($staleResource));
+
+        $this->assertFalse($cache->isFresh());
+    }
+
+    public function debugModes()
+    {
+        return array(
+            array(true),
+            array(false),
+        );
+    }
+}

vendor/symfony/config/Tests/Definition/ArrayNodeTest.php

@@ -0,0 +1,251 @@
+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <fabien@symfony.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\Component\Config\Tests\Definition;
+
+use PHPUnit\Framework\TestCase;
+use Symfony\Component\Config\Definition\ArrayNode;
+use Symfony\Component\Config\Definition\Exception\InvalidConfigurationException;
+use Symfony\Component\Config\Definition\ScalarNode;
+
+class ArrayNodeTest extends TestCase
+{
+    /**
+     * @expectedException \Symfony\Component\Config\Definition\Exception\InvalidTypeException
+     */
+    public function testNormalizeThrowsExceptionWhenFalseIsNotAllowed()
+    {
+        $node = new ArrayNode('root');
+        $node->normalize(false);
+    }
+
+    /**
+     * @expectedException        \Symfony\Component\Config\Definition\Exception\InvalidConfigurationException
+     * @expectedExceptionMessage Unrecognized option "foo" under "root"
+     */
+    public function testExceptionThrownOnUnrecognizedChild()
+    {
+        $node = new ArrayNode('root');
+        $node->normalize(array('foo' => 'bar'));
+    }
+
+    public function ignoreAndRemoveMatrixProvider()
+    {
+        $unrecognizedOptionException = new InvalidConfigurationException('Unrecognized option "foo" under "root"');
+
+        return array(
+            array(true, true, array(), 'no exception is thrown for an unrecognized child if the ignoreExtraKeys option is set to true'),
+            array(true, false, array('foo' => 'bar'), 'extra keys are not removed when ignoreExtraKeys second option is set to false'),
+            array(false, true, $unrecognizedOptionException),
+            array(false, false, $unrecognizedOptionException),
+        );
+    }
+
+    /**
+     * @dataProvider ignoreAndRemoveMatrixProvider
+     */
+    public function testIgnoreAndRemoveBehaviors($ignore, $remove, $expected, $message = '')
+    {
+        if ($expected instanceof \Exception) {
+            if (method_exists($this, 'expectException')) {
+                $this->expectException(\get_class($expected));
+                $this->expectExceptionMessage($expected->getMessage());
+            } else {
+                $this->setExpectedException(\get_class($expected), $expected->getMessage());
+            }
+        }
+        $node = new ArrayNode('root');
+        $node->setIgnoreExtraKeys($ignore, $remove);
+        $result = $node->normalize(array('foo' => 'bar'));
+        $this->assertSame($expected, $result, $message);
+    }
+
+    /**
+     * @dataProvider getPreNormalizationTests
+     */
+    public function testPreNormalize($denormalized, $normalized)
+    {
+        $node = new ArrayNode('foo');
+
+        $r = new \ReflectionMethod($node, 'preNormalize');
+        $r->setAccessible(true);
+
+        $this->assertSame($normalized, $r->invoke($node, $denormalized));
+    }
+
+    public function getPreNormalizationTests()
+    {
+        return array(
+            array(
+                array('foo-bar' => 'foo'),
+                array('foo_bar' => 'foo'),
+            ),
+            array(
+                array('foo-bar_moo' => 'foo'),
+                array('foo-bar_moo' => 'foo'),
+            ),
+            array(
+                array('anything-with-dash-and-no-underscore' => 'first', 'no_dash' => 'second'),
+                array('anything_with_dash_and_no_underscore' => 'first', 'no_dash' => 'second'),
+            ),
+            array(
+                array('foo-bar' => null, 'foo_bar' => 'foo'),
+                array('foo-bar' => null, 'foo_bar' => 'foo'),
+            ),
+        );
+    }
+
+    /**
+     * @dataProvider getZeroNamedNodeExamplesData
+     */
+    public function testNodeNameCanBeZero($denormalized, $normalized)
+    {
+        $zeroNode = new ArrayNode(0);
+        $zeroNode->addChild(new ScalarNode('name'));
+        $fiveNode = new ArrayNode(5);
+        $fiveNode->addChild(new ScalarNode(0));
+        $fiveNode->addChild(new ScalarNode('new_key'));
+        $rootNode = new ArrayNode('root');
+        $rootNode->addChild($zeroNode);
+        $rootNode->addChild($fiveNode);
+        $rootNode->addChild(new ScalarNode('string_key'));
+        $r = new \ReflectionMethod($rootNode, 'normalizeValue');
+        $r->setAccessible(true);
+
+        $this->assertSame($normalized, $r->invoke($rootNode, $denormalized));
+    }
+
+    public function getZeroNamedNodeExamplesData()
+    {
+        return array(
+            array(
+                array(
+                    0 => array(
+                        'name' => 'something',
+                    ),
+                    5 => array(
+                        0 => 'this won\'t work too',
+                        'new_key' => 'some other value',
+                    ),
+                    'string_key' => 'just value',
+                ),
+                array(
+                    0 => array(
+                        'name' => 'something',
+                    ),
+                    5 => array(
+                        0 => 'this won\'t work too',
+                        'new_key' => 'some other value',
+                    ),
+                    'string_key' => 'just value',
+                ),
+            ),
+        );
+    }
+
+    /**
+     * @dataProvider getPreNormalizedNormalizedOrderedData
+     */
+    public function testChildrenOrderIsMaintainedOnNormalizeValue($prenormalized, $normalized)
+    {
+        $scalar1 = new ScalarNode('1');
+        $scalar2 = new ScalarNode('2');
+        $scalar3 = new ScalarNode('3');
+        $node = new ArrayNode('foo');
+        $node->addChild($scalar1);
+        $node->addChild($scalar3);
+        $node->addChild($scalar2);
+
+        $r = new \ReflectionMethod($node, 'normalizeValue');
+        $r->setAccessible(true);
+
+        $this->assertSame($normalized, $r->invoke($node, $prenormalized));
+    }
+
+    public function getPreNormalizedNormalizedOrderedData()
+    {
+        return array(
+            array(
+                array('2' => 'two', '1' => 'one', '3' => 'three'),
+                array('2' => 'two', '1' => 'one', '3' => 'three'),
+            ),
+        );
+    }
+
+    /**
+     * @expectedException \InvalidArgumentException
+     * @expectedExceptionMessage Child nodes must be named.
+     */
+    public function testAddChildEmptyName()
+    {
+        $node = new ArrayNode('root');
+
+        $childNode = new ArrayNode('');
+        $node->addChild($childNode);
+    }
+
+    /**
+     * @expectedException \InvalidArgumentException
+     * @expectedExceptionMessage A child node named "foo" already exists.
+     */
+    public function testAddChildNameAlreadyExists()
+    {
+        $node = new ArrayNode('root');
+
+        $childNode = new ArrayNode('foo');
+        $node->addChild($childNode);
+
+        $childNodeWithSameName = new ArrayNode('foo');
+        $node->addChild($childNodeWithSameName);
+    }
+
+    /**
+     * @expectedException \RuntimeException
+     * @expectedExceptionMessage The node at path "foo" has no default value.
+     */
+    public function testGetDefaultValueWithoutDefaultValue()
+    {
+        $node = new ArrayNode('foo');
+        $node->getDefaultValue();
+    }
+
+    public function testSetDeprecated()
+    {
+        $childNode = new ArrayNode('foo');
+        $childNode->setDeprecated('"%node%" is deprecated');
+
+        $this->assertTrue($childNode->isDeprecated());
+        $this->assertSame('"foo" is deprecated', $childNode->getDeprecationMessage($childNode->getName(), $childNode->getPath()));
+
+        $node = new ArrayNode('root');
+        $node->addChild($childNode);
+
+        $deprecationTriggered = false;
+        $deprecationHandler = function ($level, $message, $file, $line) use (&$prevErrorHandler, &$deprecationTriggered) {
+            if (E_USER_DEPRECATED === $level) {
+                return $deprecationTriggered = true;
+            }
+
+            return $prevErrorHandler ? $prevErrorHandler($level, $message, $file, $line) : false;
+        };
+
+        $prevErrorHandler = set_error_handler($deprecationHandler);
+        $node->finalize(array());
+        restore_error_handler();
+
+        $this->assertFalse($deprecationTriggered, '->finalize() should not trigger if the deprecated node is not set');
+
+        $prevErrorHandler = set_error_handler($deprecationHandler);
+        $node->finalize(array('foo' => array()));
+        restore_error_handler();
+        $this->assertTrue($deprecationTriggered, '->finalize() should trigger if the deprecated node is set');
+    }
+}

vendor/symfony/config/Tests/Definition/BooleanNodeTest.php

@@ -0,0 +1,74 @@
+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <fabien@symfony.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\Component\Config\Tests\Definition;
+
+use PHPUnit\Framework\TestCase;
+use Symfony\Component\Config\Definition\BooleanNode;
+
+class BooleanNodeTest extends TestCase
+{
+    /**
+     * @dataProvider getValidValues
+     */
+    public function testNormalize($value)
+    {
+        $node = new BooleanNode('test');
+        $this->assertSame($value, $node->normalize($value));
+    }
+
+    /**
+     * @dataProvider getValidValues
+     *
+     * @param bool $value
+     */
+    public function testValidNonEmptyValues($value)
+    {
+        $node = new BooleanNode('test');
+        $node->setAllowEmptyValue(false);
+
+        $this->assertSame($value, $node->finalize($value));
+    }
+
+    public function getValidValues()
+    {
+        return array(
+            array(false),
+            array(true),
+        );
+    }
+
+    /**
+     * @dataProvider getInvalidValues
+     * @expectedException \Symfony\Component\Config\Definition\Exception\InvalidTypeException
+     */
+    public function testNormalizeThrowsExceptionOnInvalidValues($value)
+    {
+        $node = new BooleanNode('test');
+        $node->normalize($value);
+    }
+
+    public function getInvalidValues()
+    {
+        return array(
+            array(null),
+            array(''),
+            array('foo'),
+            array(0),
+            array(1),
+            array(0.0),
+            array(0.1),
+            array(array()),
+            array(array('foo' => 'bar')),
+            array(new \stdClass()),
+        );
+    }
+}

vendor/symfony/config/Tests/Definition/Builder/ArrayNodeDefinitionTest.php

@@ -0,0 +1,347 @@
+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <fabien@symfony.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\Component\Config\Tests\Definition\Builder;
+
+use PHPUnit\Framework\TestCase;
+use Symfony\Component\Config\Definition\Builder\ArrayNodeDefinition;
+use Symfony\Component\Config\Definition\Builder\ScalarNodeDefinition;
+use Symfony\Component\Config\Definition\Exception\InvalidDefinitionException;
+use Symfony\Component\Config\Definition\Processor;
+
+class ArrayNodeDefinitionTest extends TestCase
+{
+    public function testAppendingSomeNode()
+    {
+        $parent = new ArrayNodeDefinition('root');
+        $child = new ScalarNodeDefinition('child');
+
+        $parent
+            ->children()
+                ->scalarNode('foo')->end()
+                ->scalarNode('bar')->end()
+            ->end()
+            ->append($child);
+
+        $this->assertCount(3, $this->getField($parent, 'children'));
+        $this->assertContains($child, $this->getField($parent, 'children'));
+    }
+
+    /**
+     * @expectedException \Symfony\Component\Config\Definition\Exception\InvalidDefinitionException
+     * @dataProvider providePrototypeNodeSpecificCalls
+     */
+    public function testPrototypeNodeSpecificOption($method, $args)
+    {
+        $node = new ArrayNodeDefinition('root');
+
+        \call_user_func_array(array($node, $method), $args);
+
+        $node->getNode();
+    }
+
+    public function providePrototypeNodeSpecificCalls()
+    {
+        return array(
+            array('defaultValue', array(array())),
+            array('addDefaultChildrenIfNoneSet', array()),
+            array('requiresAtLeastOneElement', array()),
+            array('useAttributeAsKey', array('foo')),
+        );
+    }
+
+    /**
+     * @expectedException \Symfony\Component\Config\Definition\Exception\InvalidDefinitionException
+     */
+    public function testConcreteNodeSpecificOption()
+    {
+        $node = new ArrayNodeDefinition('root');
+        $node
+            ->addDefaultsIfNotSet()
+            ->prototype('array')
+        ;
+        $node->getNode();
+    }
+
+    /**
+     * @expectedException \Symfony\Component\Config\Definition\Exception\InvalidDefinitionException
+     */
+    public function testPrototypeNodesCantHaveADefaultValueWhenUsingDefaultChildren()
+    {
+        $node = new ArrayNodeDefinition('root');
+        $node
+            ->defaultValue(array())
+            ->addDefaultChildrenIfNoneSet('foo')
+            ->prototype('array')
+        ;
+        $node->getNode();
+    }
+
+    public function testPrototypedArrayNodeDefaultWhenUsingDefaultChildren()
+    {
+        $node = new ArrayNodeDefinition('root');
+        $node
+            ->addDefaultChildrenIfNoneSet()
+            ->prototype('array')
+        ;
+        $tree = $node->getNode();
+        $this->assertEquals(array(array()), $tree->getDefaultValue());
+    }
+
+    /**
+     * @dataProvider providePrototypedArrayNodeDefaults
+     */
+    public function testPrototypedArrayNodeDefault($args, $shouldThrowWhenUsingAttrAsKey, $shouldThrowWhenNotUsingAttrAsKey, $defaults)
+    {
+        $node = new ArrayNodeDefinition('root');
+        $node
+            ->addDefaultChildrenIfNoneSet($args)
+            ->prototype('array')
+        ;
+
+        try {
+            $tree = $node->getNode();
+            $this->assertFalse($shouldThrowWhenNotUsingAttrAsKey);
+            $this->assertEquals($defaults, $tree->getDefaultValue());
+        } catch (InvalidDefinitionException $e) {
+            $this->assertTrue($shouldThrowWhenNotUsingAttrAsKey);
+        }
+
+        $node = new ArrayNodeDefinition('root');
+        $node
+            ->useAttributeAsKey('attr')
+            ->addDefaultChildrenIfNoneSet($args)
+            ->prototype('array')
+        ;
+
+        try {
+            $tree = $node->getNode();
+            $this->assertFalse($shouldThrowWhenUsingAttrAsKey);
+            $this->assertEquals($defaults, $tree->getDefaultValue());
+        } catch (InvalidDefinitionException $e) {
+            $this->assertTrue($shouldThrowWhenUsingAttrAsKey);
+        }
+    }
+
+    public function providePrototypedArrayNodeDefaults()
+    {
+        return array(
+            array(null, true, false, array(array())),
+            array(2, true, false, array(array(), array())),
+            array('2', false, true, array('2' => array())),
+            array('foo', false, true, array('foo' => array())),
+            array(array('foo'), false, true, array('foo' => array())),
+            array(array('foo', 'bar'), false, true, array('foo' => array(), 'bar' => array())),
+        );
+    }
+
+    public function testNestedPrototypedArrayNodes()
+    {
+        $nodeDefinition = new ArrayNodeDefinition('root');
+        $nodeDefinition
+            ->addDefaultChildrenIfNoneSet()
+            ->prototype('array')
+                  ->prototype('array')
+        ;
+        $node = $nodeDefinition->getNode();
+
+        $this->assertInstanceOf('Symfony\Component\Config\Definition\PrototypedArrayNode', $node);
+        $this->assertInstanceOf('Symfony\Component\Config\Definition\PrototypedArrayNode', $node->getPrototype());
+    }
+
+    public function testEnabledNodeDefaults()
+    {
+        $node = new ArrayNodeDefinition('root');
+        $node
+            ->canBeEnabled()
+            ->children()
+                ->scalarNode('foo')->defaultValue('bar')->end()
+        ;
+
+        $this->assertEquals(array('enabled' => false, 'foo' => 'bar'), $node->getNode()->getDefaultValue());
+    }
+
+    /**
+     * @dataProvider getEnableableNodeFixtures
+     */
+    public function testTrueEnableEnabledNode($expected, $config, $message)
+    {
+        $processor = new Processor();
+        $node = new ArrayNodeDefinition('root');
+        $node
+            ->canBeEnabled()
+            ->children()
+                ->scalarNode('foo')->defaultValue('bar')->end()
+        ;
+
+        $this->assertEquals(
+            $expected,
+            $processor->process($node->getNode(), $config),
+            $message
+        );
+    }
+
+    public function testCanBeDisabled()
+    {
+        $node = new ArrayNodeDefinition('root');
+        $node->canBeDisabled();
+
+        $this->assertTrue($this->getField($node, 'addDefaults'));
+        $this->assertEquals(array('enabled' => false), $this->getField($node, 'falseEquivalent'));
+        $this->assertEquals(array('enabled' => true), $this->getField($node, 'trueEquivalent'));
+        $this->assertEquals(array('enabled' => true), $this->getField($node, 'nullEquivalent'));
+
+        $nodeChildren = $this->getField($node, 'children');
+        $this->assertArrayHasKey('enabled', $nodeChildren);
+
+        $enabledNode = $nodeChildren['enabled'];
+        $this->assertTrue($this->getField($enabledNode, 'default'));
+        $this->assertTrue($this->getField($enabledNode, 'defaultValue'));
+    }
+
+    public function testIgnoreExtraKeys()
+    {
+        $node = new ArrayNodeDefinition('root');
+
+        $this->assertFalse($this->getField($node, 'ignoreExtraKeys'));
+
+        $result = $node->ignoreExtraKeys();
+
+        $this->assertEquals($node, $result);
+        $this->assertTrue($this->getField($node, 'ignoreExtraKeys'));
+    }
+
+    public function testNormalizeKeys()
+    {
+        $node = new ArrayNodeDefinition('root');
+
+        $this->assertTrue($this->getField($node, 'normalizeKeys'));
+
+        $result = $node->normalizeKeys(false);
+
+        $this->assertEquals($node, $result);
+        $this->assertFalse($this->getField($node, 'normalizeKeys'));
+    }
+
+    public function testPrototypeVariable()
+    {
+        $node = new ArrayNodeDefinition('root');
+        $this->assertEquals($node->prototype('variable'), $node->variablePrototype());
+    }
+
+    public function testPrototypeScalar()
+    {
+        $node = new ArrayNodeDefinition('root');
+        $this->assertEquals($node->prototype('scalar'), $node->scalarPrototype());
+    }
+
+    public function testPrototypeBoolean()
+    {
+        $node = new ArrayNodeDefinition('root');
+        $this->assertEquals($node->prototype('boolean'), $node->booleanPrototype());
+    }
+
+    public function testPrototypeInteger()
+    {
+        $node = new ArrayNodeDefinition('root');
+        $this->assertEquals($node->prototype('integer'), $node->integerPrototype());
+    }
+
+    public function testPrototypeFloat()
+    {
+        $node = new ArrayNodeDefinition('root');
+        $this->assertEquals($node->prototype('float'), $node->floatPrototype());
+    }
+
+    public function testPrototypeArray()
+    {
+        $node = new ArrayNodeDefinition('root');
+        $this->assertEquals($node->prototype('array'), $node->arrayPrototype());
+    }
+
+    public function testPrototypeEnum()
+    {
+        $node = new ArrayNodeDefinition('root');
+        $this->assertEquals($node->prototype('enum'), $node->enumPrototype());
+    }
+
+    public function getEnableableNodeFixtures()
+    {
+        return array(
+            array(array('enabled' => true, 'foo' => 'bar'), array(true), 'true enables an enableable node'),
+            array(array('enabled' => true, 'foo' => 'bar'), array(null), 'null enables an enableable node'),
+            array(array('enabled' => true, 'foo' => 'bar'), array(array('enabled' => true)), 'An enableable node can be enabled'),
+            array(array('enabled' => true, 'foo' => 'baz'), array(array('foo' => 'baz')), 'any configuration enables an enableable node'),
+            array(array('enabled' => false, 'foo' => 'baz'), array(array('foo' => 'baz', 'enabled' => false)), 'An enableable node can be disabled'),
+            array(array('enabled' => false, 'foo' => 'bar'), array(false), 'false disables an enableable node'),
+        );
+    }
+
+    public function testRequiresAtLeastOneElement()
+    {
+        $node = new ArrayNodeDefinition('root');
+        $node
+            ->requiresAtLeastOneElement()
+            ->integerPrototype();
+
+        $node->getNode()->finalize(array(1));
+
+        $this->addToAssertionCount(1);
+    }
+
+    /**
+     * @group legacy
+     * @expectedDeprecation Using Symfony\Component\Config\Definition\Builder\ArrayNodeDefinition::cannotBeEmpty() at path "root" has no effect, consider requiresAtLeastOneElement() instead. In 4.0 both methods will behave the same.
+     */
+    public function testCannotBeEmpty()
+    {
+        $node = new ArrayNodeDefinition('root');
+        $node
+            ->cannotBeEmpty()
+            ->integerPrototype();
+
+        $node->getNode()->finalize(array());
+    }
+
+    public function testSetDeprecated()
+    {
+        $node = new ArrayNodeDefinition('root');
+        $node
+            ->children()
+                ->arrayNode('foo')->setDeprecated('The "%path%" node is deprecated.')->end()
+            ->end()
+        ;
+        $deprecatedNode = $node->getNode()->getChildren()['foo'];
+
+        $this->assertTrue($deprecatedNode->isDeprecated());
+        $this->assertSame('The "root.foo" node is deprecated.', $deprecatedNode->getDeprecationMessage($deprecatedNode->getName(), $deprecatedNode->getPath()));
+    }
+
+    /**
+     * @group legacy
+     * @expectedDeprecation ->cannotBeEmpty() is not applicable to concrete nodes at path "root". In 4.0 it will throw an exception.
+     */
+    public function testCannotBeEmptyOnConcreteNode()
+    {
+        $node = new ArrayNodeDefinition('root');
+        $node->cannotBeEmpty();
+
+        $node->getNode()->finalize(array());
+    }
+
+    protected function getField($object, $field)
+    {
+        $reflection = new \ReflectionProperty($object, $field);
+        $reflection->setAccessible(true);
+
+        return $reflection->getValue($object);
+    }
+}

vendor/symfony/config/Tests/Definition/Builder/BooleanNodeDefinitionTest.php

@@ -0,0 +1,39 @@
+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <fabien@symfony.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\Component\Config\Tests\Definition\Builder;
+
+use PHPUnit\Framework\TestCase;
+use Symfony\Component\Config\Definition\Builder\BooleanNodeDefinition;
+
+class BooleanNodeDefinitionTest extends TestCase
+{
+    /**
+     * @expectedException \Symfony\Component\Config\Definition\Exception\InvalidDefinitionException
+     * @expectedExceptionMessage ->cannotBeEmpty() is not applicable to BooleanNodeDefinition.
+     */
+    public function testCannotBeEmptyThrowsAnException()
+    {
+        $def = new BooleanNodeDefinition('foo');
+        $def->cannotBeEmpty();
+    }
+
+    public function testSetDeprecated()
+    {
+        $def = new BooleanNodeDefinition('foo');
+        $def->setDeprecated('The "%path%" node is deprecated.');
+
+        $node = $def->getNode();
+
+        $this->assertTrue($node->isDeprecated());
+        $this->assertSame('The "foo" node is deprecated.', $node->getDeprecationMessage($node->getName(), $node->getPath()));
+    }
+}

vendor/symfony/config/Tests/Definition/Builder/EnumNodeDefinitionTest.php

@@ -0,0 +1,77 @@
+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <fabien@symfony.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\Component\Config\Tests\Definition\Builder;
+
+use PHPUnit\Framework\TestCase;
+use Symfony\Component\Config\Definition\Builder\EnumNodeDefinition;
+
+class EnumNodeDefinitionTest extends TestCase
+{
+    public function testWithOneValue()
+    {
+        $def = new EnumNodeDefinition('foo');
+        $def->values(array('foo'));
+
+        $node = $def->getNode();
+        $this->assertEquals(array('foo'), $node->getValues());
+    }
+
+    public function testWithOneDistinctValue()
+    {
+        $def = new EnumNodeDefinition('foo');
+        $def->values(array('foo', 'foo'));
+
+        $node = $def->getNode();
+        $this->assertEquals(array('foo'), $node->getValues());
+    }
+
+    /**
+     * @expectedException \RuntimeException
+     * @expectedExceptionMessage You must call ->values() on enum nodes.
+     */
+    public function testNoValuesPassed()
+    {
+        $def = new EnumNodeDefinition('foo');
+        $def->getNode();
+    }
+
+    /**
+     * @expectedException \InvalidArgumentException
+     * @expectedExceptionMessage ->values() must be called with at least one value.
+     */
+    public function testWithNoValues()
+    {
+        $def = new EnumNodeDefinition('foo');
+        $def->values(array());
+    }
+
+    public function testGetNode()
+    {
+        $def = new EnumNodeDefinition('foo');
+        $def->values(array('foo', 'bar'));
+
+        $node = $def->getNode();
+        $this->assertEquals(array('foo', 'bar'), $node->getValues());
+    }
+
+    public function testSetDeprecated()
+    {
+        $def = new EnumNodeDefinition('foo');
+        $def->values(array('foo', 'bar'));
+        $def->setDeprecated('The "%path%" node is deprecated.');
+
+        $node = $def->getNode();
+
+        $this->assertTrue($node->isDeprecated());
+        $this->assertSame('The "foo" node is deprecated.', $def->getNode()->getDeprecationMessage($node->getName(), $node->getPath()));
+    }
+}

vendor/symfony/config/Tests/Definition/Builder/ExprBuilderTest.php

@@ -0,0 +1,270 @@
+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <fabien@symfony.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\Component\Config\Tests\Definition\Builder;
+
+use PHPUnit\Framework\TestCase;
+use Symfony\Component\Config\Definition\Builder\TreeBuilder;
+
+class ExprBuilderTest extends TestCase
+{
+    public function testAlwaysExpression()
+    {
+        $test = $this->getTestBuilder()
+            ->always($this->returnClosure('new_value'))
+        ->end();
+
+        $this->assertFinalizedValueIs('new_value', $test);
+    }
+
+    public function testIfTrueExpression()
+    {
+        $test = $this->getTestBuilder()
+            ->ifTrue()
+            ->then($this->returnClosure('new_value'))
+        ->end();
+        $this->assertFinalizedValueIs('new_value', $test, array('key' => true));
+
+        $test = $this->getTestBuilder()
+            ->ifTrue(function ($v) { return true; })
+            ->then($this->returnClosure('new_value'))
+        ->end();
+        $this->assertFinalizedValueIs('new_value', $test);
+
+        $test = $this->getTestBuilder()
+            ->ifTrue(function ($v) { return false; })
+            ->then($this->returnClosure('new_value'))
+        ->end();
+        $this->assertFinalizedValueIs('value', $test);
+    }
+
+    public function testIfStringExpression()
+    {
+        $test = $this->getTestBuilder()
+            ->ifString()
+            ->then($this->returnClosure('new_value'))
+        ->end();
+        $this->assertFinalizedValueIs('new_value', $test);
+
+        $test = $this->getTestBuilder()
+            ->ifString()
+            ->then($this->returnClosure('new_value'))
+        ->end();
+        $this->assertFinalizedValueIs(45, $test, array('key' => 45));
+    }
+
+    public function testIfNullExpression()
+    {
+        $test = $this->getTestBuilder()
+            ->ifNull()
+            ->then($this->returnClosure('new_value'))
+        ->end();
+        $this->assertFinalizedValueIs('new_value', $test, array('key' => null));
+
+        $test = $this->getTestBuilder()
+            ->ifNull()
+            ->then($this->returnClosure('new_value'))
+        ->end();
+        $this->assertFinalizedValueIs('value', $test);
+    }
+
+    public function testIfEmptyExpression()
+    {
+        $test = $this->getTestBuilder()
+            ->ifEmpty()
+            ->then($this->returnClosure('new_value'))
+        ->end();
+        $this->assertFinalizedValueIs('new_value', $test, array('key' => array()));
+
+        $test = $this->getTestBuilder()
+            ->ifEmpty()
+            ->then($this->returnClosure('new_value'))
+        ->end();
+        $this->assertFinalizedValueIs('value', $test);
+    }
+
+    public function testIfArrayExpression()
+    {
+        $test = $this->getTestBuilder()
+            ->ifArray()
+            ->then($this->returnClosure('new_value'))
+        ->end();
+        $this->assertFinalizedValueIs('new_value', $test, array('key' => array()));
+
+        $test = $this->getTestBuilder()
+            ->ifArray()
+            ->then($this->returnClosure('new_value'))
+        ->end();
+        $this->assertFinalizedValueIs('value', $test);
+    }
+
+    public function testIfInArrayExpression()
+    {
+        $test = $this->getTestBuilder()
+            ->ifInArray(array('foo', 'bar', 'value'))
+            ->then($this->returnClosure('new_value'))
+        ->end();
+        $this->assertFinalizedValueIs('new_value', $test);
+
+        $test = $this->getTestBuilder()
+            ->ifInArray(array('foo', 'bar'))
+            ->then($this->returnClosure('new_value'))
+        ->end();
+        $this->assertFinalizedValueIs('value', $test);
+    }
+
+    public function testIfNotInArrayExpression()
+    {
+        $test = $this->getTestBuilder()
+            ->ifNotInArray(array('foo', 'bar'))
+            ->then($this->returnClosure('new_value'))
+        ->end();
+        $this->assertFinalizedValueIs('new_value', $test);
+
+        $test = $this->getTestBuilder()
+            ->ifNotInArray(array('foo', 'bar', 'value_from_config'))
+            ->then($this->returnClosure('new_value'))
+        ->end();
+        $this->assertFinalizedValueIs('new_value', $test);
+    }
+
+    public function testThenEmptyArrayExpression()
+    {
+        $test = $this->getTestBuilder()
+            ->ifString()
+            ->thenEmptyArray()
+        ->end();
+        $this->assertFinalizedValueIs(array(), $test);
+    }
+
+    /**
+     * @dataProvider castToArrayValues
+     */
+    public function testcastToArrayExpression($configValue, $expectedValue)
+    {
+        $test = $this->getTestBuilder()
+            ->castToArray()
+        ->end();
+        $this->assertFinalizedValueIs($expectedValue, $test, array('key' => $configValue));
+    }
+
+    public function castToArrayValues()
+    {
+        yield array('value', array('value'));
+        yield array(-3.14, array(-3.14));
+        yield array(null, array(null));
+        yield array(array('value'), array('value'));
+    }
+
+    /**
+     * @expectedException \Symfony\Component\Config\Definition\Exception\InvalidConfigurationException
+     */
+    public function testThenInvalid()
+    {
+        $test = $this->getTestBuilder()
+            ->ifString()
+            ->thenInvalid('Invalid value')
+        ->end();
+        $this->finalizeTestBuilder($test);
+    }
+
+    public function testThenUnsetExpression()
+    {
+        $test = $this->getTestBuilder()
+            ->ifString()
+            ->thenUnset()
+        ->end();
+        $this->assertEquals(array(), $this->finalizeTestBuilder($test));
+    }
+
+    /**
+     * @expectedException \RuntimeException
+     * @expectedExceptionMessage You must specify an if part.
+     */
+    public function testEndIfPartNotSpecified()
+    {
+        $this->getTestBuilder()->end();
+    }
+
+    /**
+     * @expectedException \RuntimeException
+     * @expectedExceptionMessage You must specify a then part.
+     */
+    public function testEndThenPartNotSpecified()
+    {
+        $builder = $this->getTestBuilder();
+        $builder->ifPart = 'test';
+        $builder->end();
+    }
+
+    /**
+     * Create a test treebuilder with a variable node, and init the validation.
+     *
+     * @return TreeBuilder
+     */
+    protected function getTestBuilder()
+    {
+        $builder = new TreeBuilder();
+
+        return $builder
+            ->root('test')
+            ->children()
+            ->variableNode('key')
+            ->validate()
+        ;
+    }
+
+    /**
+     * Close the validation process and finalize with the given config.
+     *
+     * @param TreeBuilder $testBuilder The tree builder to finalize
+     * @param array       $config      The config you want to use for the finalization, if nothing provided
+     *                                 a simple array('key'=>'value') will be used
+     *
+     * @return array The finalized config values
+     */
+    protected function finalizeTestBuilder($testBuilder, $config = null)
+    {
+        return $testBuilder
+            ->end()
+            ->end()
+            ->end()
+            ->buildTree()
+            ->finalize(null === $config ? array('key' => 'value') : $config)
+        ;
+    }
+
+    /**
+     * Return a closure that will return the given value.
+     *
+     * @param mixed $val The value that the closure must return
+     *
+     * @return \Closure
+     */
+    protected function returnClosure($val)
+    {
+        return function ($v) use ($val) {
+            return $val;
+        };
+    }
+
+    /**
+     * Assert that the given test builder, will return the given value.
+     *
+     * @param mixed       $value       The value to test
+     * @param TreeBuilder $treeBuilder The tree builder to finalize
+     * @param mixed       $config      The config values that new to be finalized
+     */
+    protected function assertFinalizedValueIs($value, $treeBuilder, $config = null)
+    {
+        $this->assertEquals(array('key' => $value), $this->finalizeTestBuilder($treeBuilder, $config));
+    }
+}

vendor/symfony/config/Tests/Definition/Builder/NodeBuilderTest.php

@@ -0,0 +1,95 @@
+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <fabien@symfony.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\Component\Config\Tests\Definition\Builder;
+
+use PHPUnit\Framework\TestCase;
+use Symfony\Component\Config\Definition\Builder\NodeBuilder as BaseNodeBuilder;
+use Symfony\Component\Config\Definition\Builder\VariableNodeDefinition as BaseVariableNodeDefinition;
+
+class NodeBuilderTest extends TestCase
+{
+    /**
+     * @expectedException \RuntimeException
+     */
+    public function testThrowsAnExceptionWhenTryingToCreateANonRegisteredNodeType()
+    {
+        $builder = new BaseNodeBuilder();
+        $builder->node('', 'foobar');
+    }
+
+    /**
+     * @expectedException \RuntimeException
+     */
+    public function testThrowsAnExceptionWhenTheNodeClassIsNotFound()
+    {
+        $builder = new BaseNodeBuilder();
+        $builder
+            ->setNodeClass('noclasstype', '\\foo\\bar\\noclass')
+            ->node('', 'noclasstype');
+    }
+
+    public function testAddingANewNodeType()
+    {
+        $class = __NAMESPACE__.'\\SomeNodeDefinition';
+
+        $builder = new BaseNodeBuilder();
+        $node = $builder
+            ->setNodeClass('newtype', $class)
+            ->node('', 'newtype');
+
+        $this->assertInstanceOf($class, $node);
+    }
+
+    public function testOverridingAnExistingNodeType()
+    {
+        $class = __NAMESPACE__.'\\SomeNodeDefinition';
+
+        $builder = new BaseNodeBuilder();
+        $node = $builder
+            ->setNodeClass('variable', $class)
+            ->node('', 'variable');
+
+        $this->assertInstanceOf($class, $node);
+    }
+
+    public function testNodeTypesAreNotCaseSensitive()
+    {
+        $builder = new BaseNodeBuilder();
+
+        $node1 = $builder->node('', 'VaRiAbLe');
+        $node2 = $builder->node('', 'variable');
+
+        $this->assertInstanceOf(\get_class($node1), $node2);
+
+        $builder->setNodeClass('CuStOm', __NAMESPACE__.'\\SomeNodeDefinition');
+
+        $node1 = $builder->node('', 'CUSTOM');
+        $node2 = $builder->node('', 'custom');
+
+        $this->assertInstanceOf(\get_class($node1), $node2);
+    }
+
+    public function testNumericNodeCreation()
+    {
+        $builder = new BaseNodeBuilder();
+
+        $node = $builder->integerNode('foo')->min(3)->max(5);
+        $this->assertInstanceOf('Symfony\Component\Config\Definition\Builder\IntegerNodeDefinition', $node);
+
+        $node = $builder->floatNode('bar')->min(3.0)->max(5.0);
+        $this->assertInstanceOf('Symfony\Component\Config\Definition\Builder\FloatNodeDefinition', $node);
+    }
+}
+
+class SomeNodeDefinition extends BaseVariableNodeDefinition
+{
+}

vendor/symfony/config/Tests/Definition/Builder/NumericNodeDefinitionTest.php

@@ -0,0 +1,104 @@
+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <fabien@symfony.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\Component\Config\Tests\Definition\Builder;
+
+use PHPUnit\Framework\TestCase;
+use Symfony\Component\Config\Definition\Builder\FloatNodeDefinition;
+use Symfony\Component\Config\Definition\Builder\IntegerNodeDefinition;
+use Symfony\Component\Config\Definition\Builder\IntegerNodeDefinition as NumericNodeDefinition;
+
+class NumericNodeDefinitionTest extends TestCase
+{
+    /**
+     * @expectedException \InvalidArgumentException
+     * @expectedExceptionMessage You cannot define a min(4) as you already have a max(3)
+     */
+    public function testIncoherentMinAssertion()
+    {
+        $def = new NumericNodeDefinition('foo');
+        $def->max(3)->min(4);
+    }
+
+    /**
+     * @expectedException \InvalidArgumentException
+     * @expectedExceptionMessage You cannot define a max(2) as you already have a min(3)
+     */
+    public function testIncoherentMaxAssertion()
+    {
+        $node = new NumericNodeDefinition('foo');
+        $node->min(3)->max(2);
+    }
+
+    /**
+     * @expectedException \Symfony\Component\Config\Definition\Exception\InvalidConfigurationException
+     * @expectedExceptionMessage The value 4 is too small for path "foo". Should be greater than or equal to 5
+     */
+    public function testIntegerMinAssertion()
+    {
+        $def = new IntegerNodeDefinition('foo');
+        $def->min(5)->getNode()->finalize(4);
+    }
+
+    /**
+     * @expectedException \Symfony\Component\Config\Definition\Exception\InvalidConfigurationException
+     * @expectedExceptionMessage The value 4 is too big for path "foo". Should be less than or equal to 3
+     */
+    public function testIntegerMaxAssertion()
+    {
+        $def = new IntegerNodeDefinition('foo');
+        $def->max(3)->getNode()->finalize(4);
+    }
+
+    public function testIntegerValidMinMaxAssertion()
+    {
+        $def = new IntegerNodeDefinition('foo');
+        $node = $def->min(3)->max(7)->getNode();
+        $this->assertEquals(4, $node->finalize(4));
+    }
+
+    /**
+     * @expectedException \Symfony\Component\Config\Definition\Exception\InvalidConfigurationException
+     * @expectedExceptionMessage The value 400 is too small for path "foo". Should be greater than or equal to 500
+     */
+    public function testFloatMinAssertion()
+    {
+        $def = new FloatNodeDefinition('foo');
+        $def->min(5E2)->getNode()->finalize(4e2);
+    }
+
+    /**
+     * @expectedException \Symfony\Component\Config\Definition\Exception\InvalidConfigurationException
+     * @expectedExceptionMessage The value 4.3 is too big for path "foo". Should be less than or equal to 0.3
+     */
+    public function testFloatMaxAssertion()
+    {
+        $def = new FloatNodeDefinition('foo');
+        $def->max(0.3)->getNode()->finalize(4.3);
+    }
+
+    public function testFloatValidMinMaxAssertion()
+    {
+        $def = new FloatNodeDefinition('foo');
+        $node = $def->min(3.0)->max(7e2)->getNode();
+        $this->assertEquals(4.5, $node->finalize(4.5));
+    }
+
+    /**
+     * @expectedException \Symfony\Component\Config\Definition\Exception\InvalidDefinitionException
+     * @expectedExceptionMessage ->cannotBeEmpty() is not applicable to NumericNodeDefinition.
+     */
+    public function testCannotBeEmptyThrowsAnException()
+    {
+        $def = new NumericNodeDefinition('foo');
+        $def->cannotBeEmpty();
+    }
+}

vendor/symfony/config/Tests/Definition/Builder/TreeBuilderTest.php

@@ -0,0 +1,134 @@
+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <fabien@symfony.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\Component\Config\Tests\Definition\Builder;
+
+use PHPUnit\Framework\TestCase;
+use Symfony\Component\Config\Definition\Builder\TreeBuilder;
+use Symfony\Component\Config\Tests\Fixtures\Builder\NodeBuilder as CustomNodeBuilder;
+
+class TreeBuilderTest extends TestCase
+{
+    public function testUsingACustomNodeBuilder()
+    {
+        $builder = new TreeBuilder();
+        $root = $builder->root('custom', 'array', new CustomNodeBuilder());
+
+        $nodeBuilder = $root->children();
+
+        $this->assertInstanceOf('Symfony\Component\Config\Tests\Fixtures\Builder\NodeBuilder', $nodeBuilder);
+
+        $nodeBuilder = $nodeBuilder->arrayNode('deeper')->children();
+
+        $this->assertInstanceOf('Symfony\Component\Config\Tests\Fixtures\Builder\NodeBuilder', $nodeBuilder);
+    }
+
+    public function testOverrideABuiltInNodeType()
+    {
+        $builder = new TreeBuilder();
+        $root = $builder->root('override', 'array', new CustomNodeBuilder());
+
+        $definition = $root->children()->variableNode('variable');
+
+        $this->assertInstanceOf('Symfony\Component\Config\Tests\Fixtures\Builder\VariableNodeDefinition', $definition);
+    }
+
+    public function testAddANodeType()
+    {
+        $builder = new TreeBuilder();
+        $root = $builder->root('override', 'array', new CustomNodeBuilder());
+
+        $definition = $root->children()->barNode('variable');
+
+        $this->assertInstanceOf('Symfony\Component\Config\Tests\Fixtures\Builder\BarNodeDefinition', $definition);
+    }
+
+    public function testCreateABuiltInNodeTypeWithACustomNodeBuilder()
+    {
+        $builder = new TreeBuilder();
+        $root = $builder->root('builtin', 'array', new CustomNodeBuilder());
+
+        $definition = $root->children()->booleanNode('boolean');
+
+        $this->assertInstanceOf('Symfony\Component\Config\Definition\Builder\BooleanNodeDefinition', $definition);
+    }
+
+    public function testPrototypedArrayNodeUseTheCustomNodeBuilder()
+    {
+        $builder = new TreeBuilder();
+        $root = $builder->root('override', 'array', new CustomNodeBuilder());
+
+        $root->prototype('bar')->end();
+
+        $this->assertInstanceOf('Symfony\Component\Config\Tests\Fixtures\BarNode', $root->getNode(true)->getPrototype());
+    }
+
+    public function testAnExtendedNodeBuilderGetsPropagatedToTheChildren()
+    {
+        $builder = new TreeBuilder();
+
+        $builder->root('propagation')
+            ->children()
+                ->setNodeClass('extended', 'Symfony\Component\Config\Definition\Builder\BooleanNodeDefinition')
+                ->node('foo', 'extended')->end()
+                ->arrayNode('child')
+                    ->children()
+                        ->node('foo', 'extended')
+                    ->end()
+                ->end()
+            ->end()
+        ->end();
+
+        $node = $builder->buildTree();
+        $children = $node->getChildren();
+
+        $this->assertInstanceOf('Symfony\Component\Config\Definition\BooleanNode', $children['foo']);
+
+        $childChildren = $children['child']->getChildren();
+
+        $this->assertInstanceOf('Symfony\Component\Config\Definition\BooleanNode', $childChildren['foo']);
+    }
+
+    public function testDefinitionInfoGetsTransferredToNode()
+    {
+        $builder = new TreeBuilder();
+
+        $builder->root('test')->info('root info')
+            ->children()
+                ->node('child', 'variable')->info('child info')->defaultValue('default')
+            ->end()
+        ->end();
+
+        $tree = $builder->buildTree();
+        $children = $tree->getChildren();
+
+        $this->assertEquals('root info', $tree->getInfo());
+        $this->assertEquals('child info', $children['child']->getInfo());
+    }
+
+    public function testDefinitionExampleGetsTransferredToNode()
+    {
+        $builder = new TreeBuilder();
+
+        $builder->root('test')
+            ->example(array('key' => 'value'))
+            ->children()
+                ->node('child', 'variable')->info('child info')->defaultValue('default')->example('example')
+            ->end()
+        ->end();
+
+        $tree = $builder->buildTree();
+        $children = $tree->getChildren();
+
+        $this->assertInternalType('array', $tree->getExample());
+        $this->assertEquals('example', $children['child']->getExample());
+    }
+}

vendor/symfony/config/Tests/Definition/Dumper/XmlReferenceDumperTest.php

@@ -0,0 +1,114 @@
+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <fabien@symfony.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\Component\Config\Tests\Definition\Dumper;
+
+use PHPUnit\Framework\TestCase;
+use Symfony\Component\Config\Definition\Dumper\XmlReferenceDumper;
+use Symfony\Component\Config\Tests\Fixtures\Configuration\ExampleConfiguration;
+
+class XmlReferenceDumperTest extends TestCase
+{
+    public function testDumper()
+    {
+        $configuration = new ExampleConfiguration();
+
+        $dumper = new XmlReferenceDumper();
+        $this->assertEquals($this->getConfigurationAsString(), $dumper->dump($configuration));
+    }
+
+    public function testNamespaceDumper()
+    {
+        $configuration = new ExampleConfiguration();
+
+        $dumper = new XmlReferenceDumper();
+        $this->assertEquals(str_replace('http://example.org/schema/dic/acme_root', 'http://symfony.com/schema/dic/symfony', $this->getConfigurationAsString()), $dumper->dump($configuration, 'http://symfony.com/schema/dic/symfony'));
+    }
+
+    private function getConfigurationAsString()
+    {
+        return str_replace("\n", PHP_EOL, <<<'EOL'
+<!-- Namespace: http://example.org/schema/dic/acme_root -->
+<!-- scalar-required: Required -->
+<!-- scalar-deprecated: Deprecated (The child node "scalar_deprecated" at path "acme_root" is deprecated.) -->
+<!-- scalar-deprecated-with-message: Deprecated (Deprecation custom message for "scalar_deprecated_with_message" at "acme_root") -->
+<!-- enum-with-default: One of "this"; "that" -->
+<!-- enum: One of "this"; "that" -->
+<config
+    boolean="true"
+    scalar-empty=""
+    scalar-null="null"
+    scalar-true="true"
+    scalar-false="false"
+    scalar-default="default"
+    scalar-array-empty=""
+    scalar-array-defaults="elem1,elem2"
+    scalar-required=""
+    scalar-deprecated=""
+    scalar-deprecated-with-message=""
+    node-with-a-looong-name=""
+    enum-with-default="this"
+    enum=""
+>
+
+    <!-- some info -->
+    <!--
+        child3: this is a long
+                multi-line info text
+                which should be indented;
+                Example: example setting
+    -->
+    <array
+        child1=""
+        child2=""
+        child3=""
+    />
+
+    <!-- prototype -->
+    <scalar-prototyped>scalar value</scalar-prototyped>
+
+    <!-- prototype: Parameter name -->
+    <parameter name="parameter name">scalar value</parameter>
+
+    <!-- prototype -->
+    <connection
+        user=""
+        pass=""
+    />
+
+    <!-- prototype -->
+    <cms-page page="cms page page">
+
+        <!-- prototype -->
+        <!-- title: Required -->
+        <!-- path: Required -->
+        <page
+            locale="page locale"
+            title=""
+            path=""
+        />
+
+    </cms-page>
+
+    <!-- prototype -->
+    <pipou name="pipou name">
+
+        <!-- prototype -->
+        <name didou="" />
+
+    </pipou>
+
+</config>
+
+EOL
+        );
+    }
+}

vendor/symfony/config/Tests/Definition/Dumper/YamlReferenceDumperTest.php

@@ -0,0 +1,143 @@
+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <fabien@symfony.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\Component\Config\Tests\Definition\Dumper;
+
+use PHPUnit\Framework\TestCase;
+use Symfony\Component\Config\Definition\Dumper\YamlReferenceDumper;
+use Symfony\Component\Config\Tests\Fixtures\Configuration\ExampleConfiguration;
+
+class YamlReferenceDumperTest extends TestCase
+{
+    public function testDumper()
+    {
+        $configuration = new ExampleConfiguration();
+
+        $dumper = new YamlReferenceDumper();
+
+        $this->assertEquals($this->getConfigurationAsString(), $dumper->dump($configuration));
+    }
+
+    public function provideDumpAtPath()
+    {
+        return array(
+            'Regular node' => array('scalar_true', <<<EOL
+scalar_true:          true
+EOL
+            ),
+            'Array node' => array('array', <<<EOL
+# some info
+array:
+    child1:               ~
+    child2:               ~
+
+    # this is a long
+    # multi-line info text
+    # which should be indented
+    child3:               ~ # Example: example setting
+EOL
+            ),
+            'Regular nested' => array('array.child2', <<<EOL
+child2:               ~
+EOL
+            ),
+            'Prototype' => array('cms_pages.page', <<<EOL
+# Prototype
+page:
+
+    # Prototype
+    locale:
+        title:                ~ # Required
+        path:                 ~ # Required
+EOL
+            ),
+            'Nested prototype' => array('cms_pages.page.locale', <<<EOL
+# Prototype
+locale:
+    title:                ~ # Required
+    path:                 ~ # Required
+EOL
+            ),
+        );
+    }
+
+    /**
+     * @dataProvider provideDumpAtPath
+     */
+    public function testDumpAtPath($path, $expected)
+    {
+        $configuration = new ExampleConfiguration();
+
+        $dumper = new YamlReferenceDumper();
+
+        $this->assertSame(trim($expected), trim($dumper->dumpAtPath($configuration, $path)));
+    }
+
+    private function getConfigurationAsString()
+    {
+        return <<<'EOL'
+acme_root:
+    boolean:              true
+    scalar_empty:         ~
+    scalar_null:          null
+    scalar_true:          true
+    scalar_false:         false
+    scalar_default:       default
+    scalar_array_empty:   []
+    scalar_array_defaults:
+
+        # Defaults:
+        - elem1
+        - elem2
+    scalar_required:      ~ # Required
+    scalar_deprecated:    ~ # Deprecated (The child node "scalar_deprecated" at path "acme_root" is deprecated.)
+    scalar_deprecated_with_message: ~ # Deprecated (Deprecation custom message for "scalar_deprecated_with_message" at "acme_root")
+    node_with_a_looong_name: ~
+    enum_with_default:    this # One of "this"; "that"
+    enum:                 ~ # One of "this"; "that"
+
+    # some info
+    array:
+        child1:               ~
+        child2:               ~
+
+        # this is a long
+        # multi-line info text
+        # which should be indented
+        child3:               ~ # Example: example setting
+    scalar_prototyped:    []
+    parameters:
+
+        # Prototype: Parameter name
+        name:                 ~
+    connections:
+
+        # Prototype
+        -
+            user:                 ~
+            pass:                 ~
+    cms_pages:
+
+        # Prototype
+        page:
+
+            # Prototype
+            locale:
+                title:                ~ # Required
+                path:                 ~ # Required
+    pipou:
+
+        # Prototype
+        name:                 []
+
+EOL;
+    }
+}

vendor/symfony/config/Tests/Definition/EnumNodeTest.php

@@ -0,0 +1,55 @@
+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <fabien@symfony.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\Component\Config\Tests\Definition;
+
+use PHPUnit\Framework\TestCase;
+use Symfony\Component\Config\Definition\EnumNode;
+
+class EnumNodeTest extends TestCase
+{
+    public function testFinalizeValue()
+    {
+        $node = new EnumNode('foo', null, array('foo', 'bar'));
+        $this->assertSame('foo', $node->finalize('foo'));
+    }
+
+    /**
+     * @expectedException \InvalidArgumentException
+     * @expectedExceptionMessage $values must contain at least one element.
+     */
+    public function testConstructionWithNoValues()
+    {
+        new EnumNode('foo', null, array());
+    }
+
+    public function testConstructionWithOneValue()
+    {
+        $node = new EnumNode('foo', null, array('foo'));
+        $this->assertSame('foo', $node->finalize('foo'));
+    }
+
+    public function testConstructionWithOneDistinctValue()
+    {
+        $node = new EnumNode('foo', null, array('foo', 'foo'));
+        $this->assertSame('foo', $node->finalize('foo'));
+    }
+
+    /**
+     * @expectedException \Symfony\Component\Config\Definition\Exception\InvalidConfigurationException
+     * @expectedExceptionMessage The value "foobar" is not allowed for path "foo". Permissible values: "foo", "bar"
+     */
+    public function testFinalizeWithInvalidValue()
+    {
+        $node = new EnumNode('foo', null, array('foo', 'bar'));
+        $node->finalize('foobar');
+    }
+}

vendor/symfony/config/Tests/Definition/FinalizationTest.php

@@ -0,0 +1,74 @@
+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <fabien@symfony.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\Component\Config\Tests\Definition;
+
+use PHPUnit\Framework\TestCase;
+use Symfony\Component\Config\Definition\Builder\TreeBuilder;
+use Symfony\Component\Config\Definition\NodeInterface;
+use Symfony\Component\Config\Definition\Processor;
+
+class FinalizationTest extends TestCase
+{
+    public function testUnsetKeyWithDeepHierarchy()
+    {
+        $tb = new TreeBuilder();
+        $tree = $tb
+            ->root('config', 'array')
+                ->children()
+                    ->node('level1', 'array')
+                        ->canBeUnset()
+                        ->children()
+                            ->node('level2', 'array')
+                                ->canBeUnset()
+                                ->children()
+                                    ->node('somevalue', 'scalar')->end()
+                                    ->node('anothervalue', 'scalar')->end()
+                                ->end()
+                            ->end()
+                            ->node('level1_scalar', 'scalar')->end()
+                        ->end()
+                    ->end()
+                ->end()
+            ->end()
+            ->buildTree()
+        ;
+
+        $a = array(
+            'level1' => array(
+                'level2' => array(
+                    'somevalue' => 'foo',
+                    'anothervalue' => 'bar',
+                ),
+                'level1_scalar' => 'foo',
+            ),
+        );
+
+        $b = array(
+            'level1' => array(
+                'level2' => false,
+            ),
+        );
+
+        $this->assertEquals(array(
+            'level1' => array(
+                'level1_scalar' => 'foo',
+            ),
+        ), $this->process($tree, array($a, $b)));
+    }
+
+    protected function process(NodeInterface $tree, array $configs)
+    {
+        $processor = new Processor();
+
+        return $processor->process($tree, $configs);
+    }
+}

vendor/symfony/config/Tests/Definition/FloatNodeTest.php

@@ -0,0 +1,78 @@
+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <fabien@symfony.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\Component\Config\Tests\Definition;
+
+use PHPUnit\Framework\TestCase;
+use Symfony\Component\Config\Definition\FloatNode;
+
+class FloatNodeTest extends TestCase
+{
+    /**
+     * @dataProvider getValidValues
+     */
+    public function testNormalize($value)
+    {
+        $node = new FloatNode('test');
+        $this->assertSame($value, $node->normalize($value));
+    }
+
+    /**
+     * @dataProvider getValidValues
+     *
+     * @param int $value
+     */
+    public function testValidNonEmptyValues($value)
+    {
+        $node = new FloatNode('test');
+        $node->setAllowEmptyValue(false);
+
+        $this->assertSame($value, $node->finalize($value));
+    }
+
+    public function getValidValues()
+    {
+        return array(
+            array(1798.0),
+            array(-678.987),
+            array(12.56E45),
+            array(0.0),
+            // Integer are accepted too, they will be cast
+            array(17),
+            array(-10),
+            array(0),
+        );
+    }
+
+    /**
+     * @dataProvider getInvalidValues
+     * @expectedException \Symfony\Component\Config\Definition\Exception\InvalidTypeException
+     */
+    public function testNormalizeThrowsExceptionOnInvalidValues($value)
+    {
+        $node = new FloatNode('test');
+        $node->normalize($value);
+    }
+
+    public function getInvalidValues()
+    {
+        return array(
+            array(null),
+            array(''),
+            array('foo'),
+            array(true),
+            array(false),
+            array(array()),
+            array(array('foo' => 'bar')),
+            array(new \stdClass()),
+        );
+    }
+}

vendor/symfony/config/Tests/Definition/IntegerNodeTest.php

@@ -0,0 +1,75 @@
+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <fabien@symfony.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\Component\Config\Tests\Definition;
+
+use PHPUnit\Framework\TestCase;
+use Symfony\Component\Config\Definition\IntegerNode;
+
+class IntegerNodeTest extends TestCase
+{
+    /**
+     * @dataProvider getValidValues
+     */
+    public function testNormalize($value)
+    {
+        $node = new IntegerNode('test');
+        $this->assertSame($value, $node->normalize($value));
+    }
+
+    /**
+     * @dataProvider getValidValues
+     *
+     * @param int $value
+     */
+    public function testValidNonEmptyValues($value)
+    {
+        $node = new IntegerNode('test');
+        $node->setAllowEmptyValue(false);
+
+        $this->assertSame($value, $node->finalize($value));
+    }
+
+    public function getValidValues()
+    {
+        return array(
+            array(1798),
+            array(-678),
+            array(0),
+        );
+    }
+
+    /**
+     * @dataProvider getInvalidValues
+     * @expectedException \Symfony\Component\Config\Definition\Exception\InvalidTypeException
+     */
+    public function testNormalizeThrowsExceptionOnInvalidValues($value)
+    {
+        $node = new IntegerNode('test');
+        $node->normalize($value);
+    }
+
+    public function getInvalidValues()
+    {
+        return array(
+            array(null),
+            array(''),
+            array('foo'),
+            array(true),
+            array(false),
+            array(0.0),
+            array(0.1),
+            array(array()),
+            array(array('foo' => 'bar')),
+            array(new \stdClass()),
+        );
+    }
+}

vendor/symfony/config/Tests/Definition/MergeTest.php

@@ -0,0 +1,196 @@
+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <fabien@symfony.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\Component\Config\Tests\Definition;
+
+use PHPUnit\Framework\TestCase;
+use Symfony\Component\Config\Definition\Builder\TreeBuilder;
+
+class MergeTest extends TestCase
+{
+    /**
+     * @expectedException \Symfony\Component\Config\Definition\Exception\ForbiddenOverwriteException
+     */
+    public function testForbiddenOverwrite()
+    {
+        $tb = new TreeBuilder();
+        $tree = $tb
+            ->root('root', 'array')
+                ->children()
+                    ->node('foo', 'scalar')
+                        ->cannotBeOverwritten()
+                    ->end()
+                ->end()
+            ->end()
+            ->buildTree()
+        ;
+
+        $a = array(
+            'foo' => 'bar',
+        );
+
+        $b = array(
+            'foo' => 'moo',
+        );
+
+        $tree->merge($a, $b);
+    }
+
+    public function testUnsetKey()
+    {
+        $tb = new TreeBuilder();
+        $tree = $tb
+            ->root('root', 'array')
+                ->children()
+                    ->node('foo', 'scalar')->end()
+                    ->node('bar', 'scalar')->end()
+                    ->node('unsettable', 'array')
+                        ->canBeUnset()
+                        ->children()
+                            ->node('foo', 'scalar')->end()
+                            ->node('bar', 'scalar')->end()
+                        ->end()
+                    ->end()
+                    ->node('unsetted', 'array')
+                        ->canBeUnset()
+                        ->prototype('scalar')->end()
+                    ->end()
+                ->end()
+            ->end()
+            ->buildTree()
+        ;
+
+        $a = array(
+            'foo' => 'bar',
+            'unsettable' => array(
+                'foo' => 'a',
+                'bar' => 'b',
+            ),
+            'unsetted' => false,
+        );
+
+        $b = array(
+            'foo' => 'moo',
+            'bar' => 'b',
+            'unsettable' => false,
+            'unsetted' => array('a', 'b'),
+        );
+
+        $this->assertEquals(array(
+            'foo' => 'moo',
+            'bar' => 'b',
+            'unsettable' => false,
+            'unsetted' => array('a', 'b'),
+        ), $tree->merge($a, $b));
+    }
+
+    /**
+     * @expectedException \Symfony\Component\Config\Definition\Exception\InvalidConfigurationException
+     */
+    public function testDoesNotAllowNewKeysInSubsequentConfigs()
+    {
+        $tb = new TreeBuilder();
+        $tree = $tb
+            ->root('config', 'array')
+                ->children()
+                    ->node('test', 'array')
+                        ->disallowNewKeysInSubsequentConfigs()
+                        ->useAttributeAsKey('key')
+                        ->prototype('array')
+                            ->children()
+                                ->node('value', 'scalar')->end()
+                            ->end()
+                        ->end()
+                    ->end()
+                ->end()
+            ->end()
+            ->buildTree();
+
+        $a = array(
+            'test' => array(
+                'a' => array('value' => 'foo'),
+            ),
+        );
+
+        $b = array(
+            'test' => array(
+                'b' => array('value' => 'foo'),
+            ),
+        );
+
+        $tree->merge($a, $b);
+    }
+
+    public function testPerformsNoDeepMerging()
+    {
+        $tb = new TreeBuilder();
+
+        $tree = $tb
+            ->root('config', 'array')
+                ->children()
+                    ->node('no_deep_merging', 'array')
+                        ->performNoDeepMerging()
+                        ->children()
+                            ->node('foo', 'scalar')->end()
+                            ->node('bar', 'scalar')->end()
+                        ->end()
+                    ->end()
+                ->end()
+            ->end()
+            ->buildTree()
+        ;
+
+        $a = array(
+            'no_deep_merging' => array(
+                'foo' => 'a',
+                'bar' => 'b',
+            ),
+        );
+
+        $b = array(
+            'no_deep_merging' => array(
+                'c' => 'd',
+            ),
+        );
+
+        $this->assertEquals(array(
+            'no_deep_merging' => array(
+                'c' => 'd',
+            ),
+        ), $tree->merge($a, $b));
+    }
+
+    public function testPrototypeWithoutAKeyAttribute()
+    {
+        $tb = new TreeBuilder();
+
+        $tree = $tb
+            ->root('config', 'array')
+                ->children()
+                    ->arrayNode('append_elements')
+                        ->prototype('scalar')->end()
+                    ->end()
+                ->end()
+            ->end()
+            ->buildTree()
+        ;
+
+        $a = array(
+            'append_elements' => array('a', 'b'),
+        );
+
+        $b = array(
+            'append_elements' => array('c', 'd'),
+        );
+
+        $this->assertEquals(array('append_elements' => array('a', 'b', 'c', 'd')), $tree->merge($a, $b));
+    }
+}

vendor/symfony/config/Tests/Definition/NormalizationTest.php

@@ -0,0 +1,230 @@
+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <fabien@symfony.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\Component\Config\Tests\Definition;
+
+use PHPUnit\Framework\TestCase;
+use Symfony\Component\Config\Definition\Builder\TreeBuilder;
+use Symfony\Component\Config\Definition\NodeInterface;
+
+class NormalizationTest extends TestCase
+{
+    /**
+     * @dataProvider getEncoderTests
+     */
+    public function testNormalizeEncoders($denormalized)
+    {
+        $tb = new TreeBuilder();
+        $tree = $tb
+            ->root('root_name', 'array')
+                ->fixXmlConfig('encoder')
+                ->children()
+                    ->node('encoders', 'array')
+                        ->useAttributeAsKey('class')
+                        ->prototype('array')
+                            ->beforeNormalization()->ifString()->then(function ($v) { return array('algorithm' => $v); })->end()
+                            ->children()
+                                ->node('algorithm', 'scalar')->end()
+                            ->end()
+                        ->end()
+                    ->end()
+                ->end()
+            ->end()
+            ->buildTree()
+        ;
+
+        $normalized = array(
+            'encoders' => array(
+                'foo' => array('algorithm' => 'plaintext'),
+            ),
+        );
+
+        $this->assertNormalized($tree, $denormalized, $normalized);
+    }
+
+    public function getEncoderTests()
+    {
+        $configs = array();
+
+        // XML
+        $configs[] = array(
+            'encoder' => array(
+                array('class' => 'foo', 'algorithm' => 'plaintext'),
+            ),
+        );
+
+        // XML when only one element of this type
+        $configs[] = array(
+            'encoder' => array('class' => 'foo', 'algorithm' => 'plaintext'),
+        );
+
+        // YAML/PHP
+        $configs[] = array(
+            'encoders' => array(
+                array('class' => 'foo', 'algorithm' => 'plaintext'),
+            ),
+        );
+
+        // YAML/PHP
+        $configs[] = array(
+            'encoders' => array(
+                'foo' => 'plaintext',
+            ),
+        );
+
+        // YAML/PHP
+        $configs[] = array(
+            'encoders' => array(
+                'foo' => array('algorithm' => 'plaintext'),
+            ),
+        );
+
+        return array_map(function ($v) {
+            return array($v);
+        }, $configs);
+    }
+
+    /**
+     * @dataProvider getAnonymousKeysTests
+     */
+    public function testAnonymousKeysArray($denormalized)
+    {
+        $tb = new TreeBuilder();
+        $tree = $tb
+            ->root('root', 'array')
+                ->children()
+                    ->node('logout', 'array')
+                        ->fixXmlConfig('handler')
+                        ->children()
+                            ->node('handlers', 'array')
+                                ->prototype('scalar')->end()
+                            ->end()
+                        ->end()
+                    ->end()
+                ->end()
+            ->end()
+            ->buildTree()
+        ;
+
+        $normalized = array('logout' => array('handlers' => array('a', 'b', 'c')));
+
+        $this->assertNormalized($tree, $denormalized, $normalized);
+    }
+
+    public function getAnonymousKeysTests()
+    {
+        $configs = array();
+
+        $configs[] = array(
+            'logout' => array(
+                'handlers' => array('a', 'b', 'c'),
+            ),
+        );
+
+        $configs[] = array(
+            'logout' => array(
+                'handler' => array('a', 'b', 'c'),
+            ),
+        );
+
+        return array_map(function ($v) { return array($v); }, $configs);
+    }
+
+    /**
+     * @dataProvider getNumericKeysTests
+     */
+    public function testNumericKeysAsAttributes($denormalized)
+    {
+        $normalized = array(
+            'thing' => array(42 => array('foo', 'bar'), 1337 => array('baz', 'qux')),
+        );
+
+        $this->assertNormalized($this->getNumericKeysTestTree(), $denormalized, $normalized);
+    }
+
+    public function getNumericKeysTests()
+    {
+        $configs = array();
+
+        $configs[] = array(
+            'thing' => array(
+                42 => array('foo', 'bar'), 1337 => array('baz', 'qux'),
+            ),
+        );
+
+        $configs[] = array(
+            'thing' => array(
+                array('foo', 'bar', 'id' => 42), array('baz', 'qux', 'id' => 1337),
+            ),
+        );
+
+        return array_map(function ($v) { return array($v); }, $configs);
+    }
+
+    /**
+     * @expectedException \Symfony\Component\Config\Definition\Exception\InvalidConfigurationException
+     * @expectedExceptionMessage The attribute "id" must be set for path "root.thing".
+     */
+    public function testNonAssociativeArrayThrowsExceptionIfAttributeNotSet()
+    {
+        $denormalized = array(
+            'thing' => array(
+                array('foo', 'bar'), array('baz', 'qux'),
+            ),
+        );
+
+        $this->assertNormalized($this->getNumericKeysTestTree(), $denormalized, array());
+    }
+
+    public function testAssociativeArrayPreserveKeys()
+    {
+        $tb = new TreeBuilder();
+        $tree = $tb
+            ->root('root', 'array')
+                ->prototype('array')
+                    ->children()
+                        ->node('foo', 'scalar')->end()
+                    ->end()
+                ->end()
+            ->end()
+            ->buildTree()
+        ;
+
+        $data = array('first' => array('foo' => 'bar'));
+
+        $this->assertNormalized($tree, $data, $data);
+    }
+
+    public static function assertNormalized(NodeInterface $tree, $denormalized, $normalized)
+    {
+        self::assertSame($normalized, $tree->normalize($denormalized));
+    }
+
+    private function getNumericKeysTestTree()
+    {
+        $tb = new TreeBuilder();
+        $tree = $tb
+            ->root('root', 'array')
+                ->children()
+                    ->node('thing', 'array')
+                        ->useAttributeAsKey('id')
+                        ->prototype('array')
+                            ->prototype('scalar')->end()
+                        ->end()
+                    ->end()
+                ->end()
+            ->end()
+            ->buildTree()
+        ;
+
+        return $tree;
+    }
+}

vendor/symfony/config/Tests/Definition/PrototypedArrayNodeTest.php

@@ -0,0 +1,342 @@
+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <fabien@symfony.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\Component\Config\Tests\Definition;
+
+use PHPUnit\Framework\TestCase;
+use Symfony\Component\Config\Definition\ArrayNode;
+use Symfony\Component\Config\Definition\PrototypedArrayNode;
+use Symfony\Component\Config\Definition\ScalarNode;
+use Symfony\Component\Config\Definition\VariableNode;
+
+class PrototypedArrayNodeTest extends TestCase
+{
+    public function testGetDefaultValueReturnsAnEmptyArrayForPrototypes()
+    {
+        $node = new PrototypedArrayNode('root');
+        $prototype = new ArrayNode(null, $node);
+        $node->setPrototype($prototype);
+        $this->assertEmpty($node->getDefaultValue());
+    }
+
+    public function testGetDefaultValueReturnsDefaultValueForPrototypes()
+    {
+        $node = new PrototypedArrayNode('root');
+        $prototype = new ArrayNode(null, $node);
+        $node->setPrototype($prototype);
+        $node->setDefaultValue(array('test'));
+        $this->assertEquals(array('test'), $node->getDefaultValue());
+    }
+
+    // a remapped key (e.g. "mapping" -> "mappings") should be unset after being used
+    public function testRemappedKeysAreUnset()
+    {
+        $node = new ArrayNode('root');
+        $mappingsNode = new PrototypedArrayNode('mappings');
+        $node->addChild($mappingsNode);
+
+        // each item under mappings is just a scalar
+        $prototype = new ScalarNode(null, $mappingsNode);
+        $mappingsNode->setPrototype($prototype);
+
+        $remappings = array();
+        $remappings[] = array('mapping', 'mappings');
+        $node->setXmlRemappings($remappings);
+
+        $normalized = $node->normalize(array('mapping' => array('foo', 'bar')));
+        $this->assertEquals(array('mappings' => array('foo', 'bar')), $normalized);
+    }
+
+    /**
+     * Tests that when a key attribute is mapped, that key is removed from the array.
+     *
+     *     <things>
+     *         <option id="option1" value="foo">
+     *         <option id="option2" value="bar">
+     *     </things>
+     *
+     * The above should finally be mapped to an array that looks like this
+     * (because "id" is the key attribute).
+     *
+     *     array(
+     *         'things' => array(
+     *             'option1' => 'foo',
+     *             'option2' => 'bar',
+     *         )
+     *     )
+     */
+    public function testMappedAttributeKeyIsRemoved()
+    {
+        $node = new PrototypedArrayNode('root');
+        $node->setKeyAttribute('id', true);
+
+        // each item under the root is an array, with one scalar item
+        $prototype = new ArrayNode(null, $node);
+        $prototype->addChild(new ScalarNode('foo'));
+        $node->setPrototype($prototype);
+
+        $children = array();
+        $children[] = array('id' => 'item_name', 'foo' => 'bar');
+        $normalized = $node->normalize($children);
+
+        $expected = array();
+        $expected['item_name'] = array('foo' => 'bar');
+        $this->assertEquals($expected, $normalized);
+    }
+
+    /**
+     * Tests the opposite of the testMappedAttributeKeyIsRemoved because
+     * the removal can be toggled with an option.
+     */
+    public function testMappedAttributeKeyNotRemoved()
+    {
+        $node = new PrototypedArrayNode('root');
+        $node->setKeyAttribute('id', false);
+
+        // each item under the root is an array, with two scalar items
+        $prototype = new ArrayNode(null, $node);
+        $prototype->addChild(new ScalarNode('foo'));
+        $prototype->addChild(new ScalarNode('id')); // the key attribute will remain
+        $node->setPrototype($prototype);
+
+        $children = array();
+        $children[] = array('id' => 'item_name', 'foo' => 'bar');
+        $normalized = $node->normalize($children);
+
+        $expected = array();
+        $expected['item_name'] = array('id' => 'item_name', 'foo' => 'bar');
+        $this->assertEquals($expected, $normalized);
+    }
+
+    public function testAddDefaultChildren()
+    {
+        $node = $this->getPrototypeNodeWithDefaultChildren();
+        $node->setAddChildrenIfNoneSet();
+        $this->assertTrue($node->hasDefaultValue());
+        $this->assertEquals(array(array('foo' => 'bar')), $node->getDefaultValue());
+
+        $node = $this->getPrototypeNodeWithDefaultChildren();
+        $node->setKeyAttribute('foobar');
+        $node->setAddChildrenIfNoneSet();
+        $this->assertTrue($node->hasDefaultValue());
+        $this->assertEquals(array('defaults' => array('foo' => 'bar')), $node->getDefaultValue());
+
+        $node = $this->getPrototypeNodeWithDefaultChildren();
+        $node->setKeyAttribute('foobar');
+        $node->setAddChildrenIfNoneSet('defaultkey');
+        $this->assertTrue($node->hasDefaultValue());
+        $this->assertEquals(array('defaultkey' => array('foo' => 'bar')), $node->getDefaultValue());
+
+        $node = $this->getPrototypeNodeWithDefaultChildren();
+        $node->setKeyAttribute('foobar');
+        $node->setAddChildrenIfNoneSet(array('defaultkey'));
+        $this->assertTrue($node->hasDefaultValue());
+        $this->assertEquals(array('defaultkey' => array('foo' => 'bar')), $node->getDefaultValue());
+
+        $node = $this->getPrototypeNodeWithDefaultChildren();
+        $node->setKeyAttribute('foobar');
+        $node->setAddChildrenIfNoneSet(array('dk1', 'dk2'));
+        $this->assertTrue($node->hasDefaultValue());
+        $this->assertEquals(array('dk1' => array('foo' => 'bar'), 'dk2' => array('foo' => 'bar')), $node->getDefaultValue());
+
+        $node = $this->getPrototypeNodeWithDefaultChildren();
+        $node->setAddChildrenIfNoneSet(array(5, 6));
+        $this->assertTrue($node->hasDefaultValue());
+        $this->assertEquals(array(0 => array('foo' => 'bar'), 1 => array('foo' => 'bar')), $node->getDefaultValue());
+
+        $node = $this->getPrototypeNodeWithDefaultChildren();
+        $node->setAddChildrenIfNoneSet(2);
+        $this->assertTrue($node->hasDefaultValue());
+        $this->assertEquals(array(array('foo' => 'bar'), array('foo' => 'bar')), $node->getDefaultValue());
+    }
+
+    public function testDefaultChildrenWinsOverDefaultValue()
+    {
+        $node = $this->getPrototypeNodeWithDefaultChildren();
+        $node->setAddChildrenIfNoneSet();
+        $node->setDefaultValue(array('bar' => 'foo'));
+        $this->assertTrue($node->hasDefaultValue());
+        $this->assertEquals(array(array('foo' => 'bar')), $node->getDefaultValue());
+    }
+
+    protected function getPrototypeNodeWithDefaultChildren()
+    {
+        $node = new PrototypedArrayNode('root');
+        $prototype = new ArrayNode(null, $node);
+        $child = new ScalarNode('foo');
+        $child->setDefaultValue('bar');
+        $prototype->addChild($child);
+        $prototype->setAddIfNotSet(true);
+        $node->setPrototype($prototype);
+
+        return $node;
+    }
+
+    /**
+     * Tests that when a key attribute is mapped, that key is removed from the array.
+     * And if only 'value' element is left in the array, it will replace its wrapper array.
+     *
+     *     <things>
+     *         <option id="option1" value="value1">
+     *     </things>
+     *
+     * The above should finally be mapped to an array that looks like this
+     * (because "id" is the key attribute).
+     *
+     *     array(
+     *         'things' => array(
+     *             'option1' => 'value1'
+     *         )
+     *     )
+     *
+     * It's also possible to mix 'value-only' and 'non-value-only' elements in the array.
+     *
+     * <things>
+     *     <option id="option1" value="value1">
+     *     <option id="option2" value="value2" foo="foo2">
+     * </things>
+     *
+     * The above should finally be mapped to an array as follows
+     *
+     * array(
+     *     'things' => array(
+     *         'option1' => 'value1',
+     *         'option2' => array(
+     *             'value' => 'value2',
+     *             'foo' => 'foo2'
+     *         )
+     *     )
+     * )
+     *
+     * The 'value' element can also be ArrayNode:
+     *
+     * <things>
+     *     <option id="option1">
+     *         <value>
+     *            <foo>foo1</foo>
+     *            <bar>bar1</bar>
+     *         </value>
+     *     </option>
+     * </things>
+     *
+     * The above should be finally be mapped to an array as follows
+     *
+     * array(
+     *     'things' => array(
+     *         'option1' => array(
+     *             'foo' => 'foo1',
+     *             'bar' => 'bar1'
+     *         )
+     *     )
+     * )
+     *
+     * If using VariableNode for value node, it's also possible to mix different types of value nodes:
+     *
+     * <things>
+     *     <option id="option1">
+     *         <value>
+     *            <foo>foo1</foo>
+     *            <bar>bar1</bar>
+     *         </value>
+     *     </option>
+     *     <option id="option2" value="value2">
+     * </things>
+     *
+     * The above should be finally mapped to an array as follows
+     *
+     * array(
+     *     'things' => array(
+     *         'option1' => array(
+     *             'foo' => 'foo1',
+     *             'bar' => 'bar1'
+     *         ),
+     *         'option2' => 'value2'
+     *     )
+     * )
+     *
+     *
+     * @dataProvider getDataForKeyRemovedLeftValueOnly
+     */
+    public function testMappedAttributeKeyIsRemovedLeftValueOnly($value, $children, $expected)
+    {
+        $node = new PrototypedArrayNode('root');
+        $node->setKeyAttribute('id', true);
+
+        // each item under the root is an array, with one scalar item
+        $prototype = new ArrayNode(null, $node);
+        $prototype->addChild(new ScalarNode('id'));
+        $prototype->addChild(new ScalarNode('foo'));
+        $prototype->addChild($value);
+        $node->setPrototype($prototype);
+
+        $normalized = $node->normalize($children);
+        $this->assertEquals($expected, $normalized);
+    }
+
+    public function getDataForKeyRemovedLeftValueOnly()
+    {
+        $scalarValue = new ScalarNode('value');
+
+        $arrayValue = new ArrayNode('value');
+        $arrayValue->addChild(new ScalarNode('foo'));
+        $arrayValue->addChild(new ScalarNode('bar'));
+
+        $variableValue = new VariableNode('value');
+
+        return array(
+           array(
+               $scalarValue,
+               array(
+                   array('id' => 'option1', 'value' => 'value1'),
+               ),
+               array('option1' => 'value1'),
+           ),
+
+           array(
+               $scalarValue,
+               array(
+                   array('id' => 'option1', 'value' => 'value1'),
+                   array('id' => 'option2', 'value' => 'value2', 'foo' => 'foo2'),
+               ),
+               array(
+                   'option1' => 'value1',
+                   'option2' => array('value' => 'value2', 'foo' => 'foo2'),
+               ),
+           ),
+
+           array(
+               $arrayValue,
+               array(
+                   array(
+                       'id' => 'option1',
+                       'value' => array('foo' => 'foo1', 'bar' => 'bar1'),
+                   ),
+               ),
+               array(
+                   'option1' => array('foo' => 'foo1', 'bar' => 'bar1'),
+               ),
+           ),
+
+           array($variableValue,
+               array(
+                   array(
+                       'id' => 'option1', 'value' => array('foo' => 'foo1', 'bar' => 'bar1'),
+                   ),
+                   array('id' => 'option2', 'value' => 'value2'),
+               ),
+               array(
+                   'option1' => array('foo' => 'foo1', 'bar' => 'bar1'),
+                   'option2' => 'value2',
+               ),
+           ),
+        );
+    }
+}

vendor/symfony/config/Tests/Definition/ScalarNodeTest.php

@@ -0,0 +1,169 @@
+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <fabien@symfony.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\Component\Config\Tests\Definition;
+
+use PHPUnit\Framework\TestCase;
+use Symfony\Component\Config\Definition\ArrayNode;
+use Symfony\Component\Config\Definition\ScalarNode;
+
+class ScalarNodeTest extends TestCase
+{
+    /**
+     * @dataProvider getValidValues
+     */
+    public function testNormalize($value)
+    {
+        $node = new ScalarNode('test');
+        $this->assertSame($value, $node->normalize($value));
+    }
+
+    public function getValidValues()
+    {
+        return array(
+            array(false),
+            array(true),
+            array(null),
+            array(''),
+            array('foo'),
+            array(0),
+            array(1),
+            array(0.0),
+            array(0.1),
+        );
+    }
+
+    public function testSetDeprecated()
+    {
+        $childNode = new ScalarNode('foo');
+        $childNode->setDeprecated('"%node%" is deprecated');
+
+        $this->assertTrue($childNode->isDeprecated());
+        $this->assertSame('"foo" is deprecated', $childNode->getDeprecationMessage($childNode->getName(), $childNode->getPath()));
+
+        $node = new ArrayNode('root');
+        $node->addChild($childNode);
+
+        $deprecationTriggered = 0;
+        $deprecationHandler = function ($level, $message, $file, $line) use (&$prevErrorHandler, &$deprecationTriggered) {
+            if (E_USER_DEPRECATED === $level) {
+                return ++$deprecationTriggered;
+            }
+
+            return $prevErrorHandler ? $prevErrorHandler($level, $message, $file, $line) : false;
+        };
+
+        $prevErrorHandler = set_error_handler($deprecationHandler);
+        $node->finalize(array());
+        restore_error_handler();
+        $this->assertSame(0, $deprecationTriggered, '->finalize() should not trigger if the deprecated node is not set');
+
+        $prevErrorHandler = set_error_handler($deprecationHandler);
+        $node->finalize(array('foo' => ''));
+        restore_error_handler();
+        $this->assertSame(1, $deprecationTriggered, '->finalize() should trigger if the deprecated node is set');
+    }
+
+    /**
+     * @dataProvider getInvalidValues
+     * @expectedException \Symfony\Component\Config\Definition\Exception\InvalidTypeException
+     */
+    public function testNormalizeThrowsExceptionOnInvalidValues($value)
+    {
+        $node = new ScalarNode('test');
+        $node->normalize($value);
+    }
+
+    public function getInvalidValues()
+    {
+        return array(
+            array(array()),
+            array(array('foo' => 'bar')),
+            array(new \stdClass()),
+        );
+    }
+
+    public function testNormalizeThrowsExceptionWithoutHint()
+    {
+        $node = new ScalarNode('test');
+
+        if (method_exists($this, 'expectException')) {
+            $this->expectException('Symfony\Component\Config\Definition\Exception\InvalidTypeException');
+            $this->expectExceptionMessage('Invalid type for path "test". Expected scalar, but got array.');
+        } else {
+            $this->setExpectedException('Symfony\Component\Config\Definition\Exception\InvalidTypeException', 'Invalid type for path "test". Expected scalar, but got array.');
+        }
+
+        $node->normalize(array());
+    }
+
+    public function testNormalizeThrowsExceptionWithErrorMessage()
+    {
+        $node = new ScalarNode('test');
+        $node->setInfo('"the test value"');
+
+        if (method_exists($this, 'expectException')) {
+            $this->expectException('Symfony\Component\Config\Definition\Exception\InvalidTypeException');
+            $this->expectExceptionMessage("Invalid type for path \"test\". Expected scalar, but got array.\nHint: \"the test value\"");
+        } else {
+            $this->setExpectedException('Symfony\Component\Config\Definition\Exception\InvalidTypeException', "Invalid type for path \"test\". Expected scalar, but got array.\nHint: \"the test value\"");
+        }
+
+        $node->normalize(array());
+    }
+
+    /**
+     * @dataProvider getValidNonEmptyValues
+     *
+     * @param mixed $value
+     */
+    public function testValidNonEmptyValues($value)
+    {
+        $node = new ScalarNode('test');
+        $node->setAllowEmptyValue(false);
+
+        $this->assertSame($value, $node->finalize($value));
+    }
+
+    public function getValidNonEmptyValues()
+    {
+        return array(
+            array(false),
+            array(true),
+            array('foo'),
+            array(0),
+            array(1),
+            array(0.0),
+            array(0.1),
+        );
+    }
+
+    /**
+     * @dataProvider getEmptyValues
+     * @expectedException \Symfony\Component\Config\Definition\Exception\InvalidConfigurationException
+     *
+     * @param mixed $value
+     */
+    public function testNotAllowedEmptyValuesThrowException($value)
+    {
+        $node = new ScalarNode('test');
+        $node->setAllowEmptyValue(false);
+        $node->finalize($value);
+    }
+
+    public function getEmptyValues()
+    {
+        return array(
+            array(null),
+            array(''),
+        );
+    }
+}

vendor/symfony/config/Tests/DependencyInjection/ConfigCachePassTest.php

@@ -0,0 +1,59 @@
+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <fabien@symfony.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\Component\Config\Tests\DependencyInjection;
+
+use PHPUnit\Framework\TestCase;
+use Symfony\Component\Config\DependencyInjection\ConfigCachePass;
+use Symfony\Component\DependencyInjection\Argument\IteratorArgument;
+use Symfony\Component\DependencyInjection\ContainerBuilder;
+use Symfony\Component\DependencyInjection\Reference;
+
+/**
+ * @group legacy
+ */
+class ConfigCachePassTest extends TestCase
+{
+    public function testThatCheckersAreProcessedInPriorityOrder()
+    {
+        $container = new ContainerBuilder();
+
+        $definition = $container->register('config_cache_factory')->addArgument(null);
+        $container->register('checker_2')->addTag('config_cache.resource_checker', array('priority' => 100));
+        $container->register('checker_1')->addTag('config_cache.resource_checker', array('priority' => 200));
+        $container->register('checker_3')->addTag('config_cache.resource_checker');
+
+        $pass = new ConfigCachePass();
+        $pass->process($container);
+
+        $expected = new IteratorArgument(array(
+            new Reference('checker_1'),
+            new Reference('checker_2'),
+            new Reference('checker_3'),
+        ));
+        $this->assertEquals($expected, $definition->getArgument(0));
+    }
+
+    public function testThatCheckersCanBeMissing()
+    {
+        $container = new ContainerBuilder();
+
+        $definitionsBefore = \count($container->getDefinitions());
+        $aliasesBefore = \count($container->getAliases());
+
+        $pass = new ConfigCachePass();
+        $pass->process($container);
+
+        // the container is untouched (i.e. no new definitions or aliases)
+        $this->assertCount($definitionsBefore, $container->getDefinitions());
+        $this->assertCount($aliasesBefore, $container->getAliases());
+    }
+}

vendor/symfony/config/Tests/Exception/FileLoaderLoadExceptionTest.php

@@ -0,0 +1,98 @@
+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <fabien@symfony.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\Component\Config\Tests\Exception;
+
+use PHPUnit\Framework\TestCase;
+use Symfony\Component\Config\Exception\FileLoaderLoadException;
+
+class FileLoaderLoadExceptionTest extends TestCase
+{
+    public function testMessageCannotLoadResource()
+    {
+        $exception = new FileLoaderLoadException('resource', null);
+        $this->assertEquals('Cannot load resource "resource".', $exception->getMessage());
+    }
+
+    public function testMessageCannotLoadResourceWithType()
+    {
+        $exception = new FileLoaderLoadException('resource', null, null, null, 'foobar');
+        $this->assertEquals('Cannot load resource "resource". Make sure there is a loader supporting the "foobar" type.', $exception->getMessage());
+    }
+
+    public function testMessageCannotLoadResourceWithAnnotationType()
+    {
+        $exception = new FileLoaderLoadException('resource', null, null, null, 'annotation');
+        $this->assertEquals('Cannot load resource "resource". Make sure annotations are installed and enabled.', $exception->getMessage());
+    }
+
+    public function testMessageCannotImportResourceFromSource()
+    {
+        $exception = new FileLoaderLoadException('resource', 'sourceResource');
+        $this->assertEquals('Cannot import resource "resource" from "sourceResource".', $exception->getMessage());
+    }
+
+    public function testMessageCannotImportBundleResource()
+    {
+        $exception = new FileLoaderLoadException('@resource', 'sourceResource');
+        $this->assertEquals(
+            'Cannot import resource "@resource" from "sourceResource". '.
+            'Make sure the "resource" bundle is correctly registered and loaded in the application kernel class. '.
+            'If the bundle is registered, make sure the bundle path "@resource" is not empty.',
+            $exception->getMessage()
+        );
+    }
+
+    public function testMessageHasPreviousErrorWithDotAndUnableToLoad()
+    {
+        $exception = new FileLoaderLoadException(
+            'resource',
+            null,
+            null,
+            new \Exception('There was a previous error with an ending dot.')
+        );
+        $this->assertEquals(
+            'There was a previous error with an ending dot in resource (which is loaded in resource "resource").',
+            $exception->getMessage()
+        );
+    }
+
+    public function testMessageHasPreviousErrorWithoutDotAndUnableToLoad()
+    {
+        $exception = new FileLoaderLoadException(
+            'resource',
+            null,
+            null,
+            new \Exception('There was a previous error with no ending dot')
+        );
+        $this->assertEquals(
+            'There was a previous error with no ending dot in resource (which is loaded in resource "resource").',
+            $exception->getMessage()
+        );
+    }
+
+    public function testMessageHasPreviousErrorAndUnableToLoadBundle()
+    {
+        $exception = new FileLoaderLoadException(
+            '@resource',
+            null,
+            null,
+            new \Exception('There was a previous error with an ending dot.')
+        );
+        $this->assertEquals(
+            'There was a previous error with an ending dot in @resource '.
+            '(which is loaded in resource "@resource"). '.
+            'Make sure the "resource" bundle is correctly registered and loaded in the application kernel class. '.
+            'If the bundle is registered, make sure the bundle path "@resource" is not empty.',
+            $exception->getMessage()
+        );
+    }
+}

vendor/symfony/config/Tests/FileLocatorTest.php

@@ -0,0 +1,120 @@
+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <fabien@symfony.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\Component\Config\Tests;
+
+use PHPUnit\Framework\TestCase;
+use Symfony\Component\Config\FileLocator;
+
+class FileLocatorTest extends TestCase
+{
+    /**
+     * @dataProvider getIsAbsolutePathTests
+     */
+    public function testIsAbsolutePath($path)
+    {
+        $loader = new FileLocator(array());
+        $r = new \ReflectionObject($loader);
+        $m = $r->getMethod('isAbsolutePath');
+        $m->setAccessible(true);
+
+        $this->assertTrue($m->invoke($loader, $path), '->isAbsolutePath() returns true for an absolute path');
+    }
+
+    public function getIsAbsolutePathTests()
+    {
+        return array(
+            array('/foo.xml'),
+            array('c:\\\\foo.xml'),
+            array('c:/foo.xml'),
+            array('\\server\\foo.xml'),
+            array('https://server/foo.xml'),
+            array('phar://server/foo.xml'),
+        );
+    }
+
+    public function testLocate()
+    {
+        $loader = new FileLocator(__DIR__.'/Fixtures');
+
+        $this->assertEquals(
+            __DIR__.\DIRECTORY_SEPARATOR.'FileLocatorTest.php',
+            $loader->locate('FileLocatorTest.php', __DIR__),
+            '->locate() returns the absolute filename if the file exists in the given path'
+        );
+
+        $this->assertEquals(
+            __DIR__.'/Fixtures'.\DIRECTORY_SEPARATOR.'foo.xml',
+            $loader->locate('foo.xml', __DIR__),
+            '->locate() returns the absolute filename if the file exists in one of the paths given in the constructor'
+        );
+
+        $this->assertEquals(
+            __DIR__.'/Fixtures'.\DIRECTORY_SEPARATOR.'foo.xml',
+            $loader->locate(__DIR__.'/Fixtures'.\DIRECTORY_SEPARATOR.'foo.xml', __DIR__),
+            '->locate() returns the absolute filename if the file exists in one of the paths given in the constructor'
+        );
+
+        $loader = new FileLocator(array(__DIR__.'/Fixtures', __DIR__.'/Fixtures/Again'));
+
+        $this->assertEquals(
+            array(__DIR__.'/Fixtures'.\DIRECTORY_SEPARATOR.'foo.xml', __DIR__.'/Fixtures/Again'.\DIRECTORY_SEPARATOR.'foo.xml'),
+            $loader->locate('foo.xml', __DIR__, false),
+            '->locate() returns an array of absolute filenames'
+        );
+
+        $this->assertEquals(
+            array(__DIR__.'/Fixtures'.\DIRECTORY_SEPARATOR.'foo.xml', __DIR__.'/Fixtures/Again'.\DIRECTORY_SEPARATOR.'foo.xml'),
+            $loader->locate('foo.xml', __DIR__.'/Fixtures', false),
+            '->locate() returns an array of absolute filenames'
+        );
+
+        $loader = new FileLocator(__DIR__.'/Fixtures/Again');
+
+        $this->assertEquals(
+            array(__DIR__.'/Fixtures'.\DIRECTORY_SEPARATOR.'foo.xml', __DIR__.'/Fixtures/Again'.\DIRECTORY_SEPARATOR.'foo.xml'),
+            $loader->locate('foo.xml', __DIR__.'/Fixtures', false),
+            '->locate() returns an array of absolute filenames'
+        );
+    }
+
+    /**
+     * @expectedException \Symfony\Component\Config\Exception\FileLocatorFileNotFoundException
+     * @expectedExceptionMessage The file "foobar.xml" does not exist
+     */
+    public function testLocateThrowsAnExceptionIfTheFileDoesNotExists()
+    {
+        $loader = new FileLocator(array(__DIR__.'/Fixtures'));
+
+        $loader->locate('foobar.xml', __DIR__);
+    }
+
+    /**
+     * @expectedException \Symfony\Component\Config\Exception\FileLocatorFileNotFoundException
+     */
+    public function testLocateThrowsAnExceptionIfTheFileDoesNotExistsInAbsolutePath()
+    {
+        $loader = new FileLocator(array(__DIR__.'/Fixtures'));
+
+        $loader->locate(__DIR__.'/Fixtures/foobar.xml', __DIR__);
+    }
+
+    /**
+     * @expectedException \InvalidArgumentException
+     * @expectedExceptionMessage An empty file name is not valid to be located.
+     */
+    public function testLocateEmpty()
+    {
+        $loader = new FileLocator(array(__DIR__.'/Fixtures'));
+
+        $loader->locate(null, __DIR__);
+    }
+}

vendor/symfony/config/Tests/Fixtures/BadParent.php

@@ -0,0 +1,7 @@
+<?php
+
+namespace Symfony\Component\Config\Tests\Fixtures;
+
+class BadParent extends MissingParent
+{
+}

vendor/symfony/config/Tests/Fixtures/BarNode.php

@@ -0,0 +1,18 @@
+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <fabien@symfony.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\Component\Config\Tests\Fixtures;
+
+use Symfony\Component\Config\Definition\ArrayNode;
+
+class BarNode extends ArrayNode
+{
+}

vendor/symfony/config/Tests/Fixtures/Builder/BarNodeDefinition.php

@@ -0,0 +1,23 @@
+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <fabien@symfony.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\Component\Config\Tests\Fixtures\Builder;
+
+use Symfony\Component\Config\Definition\Builder\NodeDefinition;
+use Symfony\Component\Config\Tests\Fixtures\BarNode;
+
+class BarNodeDefinition extends NodeDefinition
+{
+    protected function createNode()
+    {
+        return new BarNode($this->name);
+    }
+}

vendor/symfony/config/Tests/Fixtures/Builder/NodeBuilder.php

@@ -0,0 +1,34 @@
+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <fabien@symfony.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\Component\Config\Tests\Fixtures\Builder;
+
+use Symfony\Component\Config\Definition\Builder\NodeBuilder as BaseNodeBuilder;
+
+class NodeBuilder extends BaseNodeBuilder
+{
+    public function barNode($name)
+    {
+        return $this->node($name, 'bar');
+    }
+
+    protected function getNodeClass($type)
+    {
+        switch ($type) {
+            case 'variable':
+                return __NAMESPACE__.'\\'.ucfirst($type).'NodeDefinition';
+            case 'bar':
+                return __NAMESPACE__.'\\'.ucfirst($type).'NodeDefinition';
+            default:
+                return parent::getNodeClass($type);
+        }
+    }
+}

vendor/symfony/config/Tests/Fixtures/Builder/VariableNodeDefinition.php

@@ -0,0 +1,18 @@
+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <fabien@symfony.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\Component\Config\Tests\Fixtures\Builder;
+
+use Symfony\Component\Config\Definition\Builder\VariableNodeDefinition as BaseVariableNodeDefinition;
+
+class VariableNodeDefinition extends BaseVariableNodeDefinition
+{
+}

vendor/symfony/config/Tests/Fixtures/Configuration/ExampleConfiguration.php

@@ -0,0 +1,102 @@
+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <fabien@symfony.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\Component\Config\Tests\Fixtures\Configuration;
+
+use Symfony\Component\Config\Definition\Builder\TreeBuilder;
+use Symfony\Component\Config\Definition\ConfigurationInterface;
+
+class ExampleConfiguration implements ConfigurationInterface
+{
+    public function getConfigTreeBuilder()
+    {
+        $treeBuilder = new TreeBuilder();
+        $rootNode = $treeBuilder->root('acme_root');
+
+        $rootNode
+            ->fixXmlConfig('parameter')
+            ->fixXmlConfig('connection')
+            ->fixXmlConfig('cms_page')
+            ->children()
+                ->booleanNode('boolean')->defaultTrue()->end()
+                ->scalarNode('scalar_empty')->end()
+                ->scalarNode('scalar_null')->defaultNull()->end()
+                ->scalarNode('scalar_true')->defaultTrue()->end()
+                ->scalarNode('scalar_false')->defaultFalse()->end()
+                ->scalarNode('scalar_default')->defaultValue('default')->end()
+                ->scalarNode('scalar_array_empty')->defaultValue(array())->end()
+                ->scalarNode('scalar_array_defaults')->defaultValue(array('elem1', 'elem2'))->end()
+                ->scalarNode('scalar_required')->isRequired()->end()
+                ->scalarNode('scalar_deprecated')->setDeprecated()->end()
+                ->scalarNode('scalar_deprecated_with_message')->setDeprecated('Deprecation custom message for "%node%" at "%path%"')->end()
+                ->scalarNode('node_with_a_looong_name')->end()
+                ->enumNode('enum_with_default')->values(array('this', 'that'))->defaultValue('this')->end()
+                ->enumNode('enum')->values(array('this', 'that'))->end()
+                ->arrayNode('array')
+                    ->info('some info')
+                    ->canBeUnset()
+                    ->children()
+                        ->scalarNode('child1')->end()
+                        ->scalarNode('child2')->end()
+                        ->scalarNode('child3')
+                            ->info(
+                                "this is a long\n".
+                                "multi-line info text\n".
+                                'which should be indented'
+                            )
+                            ->example('example setting')
+                        ->end()
+                    ->end()
+                ->end()
+                ->arrayNode('scalar_prototyped')
+                    ->prototype('scalar')->end()
+                ->end()
+                ->arrayNode('parameters')
+                    ->useAttributeAsKey('name')
+                    ->prototype('scalar')->info('Parameter name')->end()
+                ->end()
+                ->arrayNode('connections')
+                    ->prototype('array')
+                        ->children()
+                            ->scalarNode('user')->end()
+                            ->scalarNode('pass')->end()
+                        ->end()
+                    ->end()
+                ->end()
+                ->arrayNode('cms_pages')
+                    ->useAttributeAsKey('page')
+                    ->prototype('array')
+                        ->useAttributeAsKey('locale')
+                        ->prototype('array')
+                            ->children()
+                                ->scalarNode('title')->isRequired()->end()
+                                ->scalarNode('path')->isRequired()->end()
+                            ->end()
+                        ->end()
+                    ->end()
+                ->end()
+                ->arrayNode('pipou')
+                    ->useAttributeAsKey('name')
+                    ->prototype('array')
+                        ->prototype('array')
+                            ->children()
+                                ->scalarNode('didou')
+                                ->end()
+                            ->end()
+                        ->end()
+                    ->end()
+                ->end()
+            ->end()
+        ;
+
+        return $treeBuilder;
+    }
+}

vendor/symfony/config/Tests/Fixtures/Resource/ConditionalClass.php

@@ -0,0 +1,9 @@
+<?php
+
+namespace Symfony\Component\Config\Tests\Fixtures\Resource;
+
+if (!class_exists(MissingClass::class)) {
+    class ConditionalClass
+    {
+    }
+}

vendor/symfony/config/Tests/Fixtures/Util/document_type.xml

@@ -0,0 +1,3 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE scan [<!ENTITY test SYSTEM "php://filter/read=convert.base64-encode/resource={{ resource }}">]>
+<scan></scan>

vendor/symfony/config/Tests/Fixtures/Util/invalid.xml

@@ -0,0 +1,2 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<root>

vendor/symfony/config/Tests/Fixtures/Util/invalid_schema.xml

@@ -0,0 +1,2 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<root2 xmlns="http://example.com/schema" />

vendor/symfony/config/Tests/Fixtures/Util/schema.xsd

@@ -0,0 +1,9 @@
+<?xml version="1.0" encoding="UTF-8"?>
+
+<xsd:schema xmlns="http://example.com/schema"
+    xmlns:xsd="http://www.w3.org/2001/XMLSchema"
+    targetNamespace="http://example.com/schema"
+    elementFormDefault="qualified">
+
+  <xsd:element name="root" />
+</xsd:schema>

vendor/symfony/config/Tests/Fixtures/Util/valid.xml

@@ -0,0 +1,3 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<root xmlns="http://example.com/schema">
+</root>

vendor/symfony/config/Tests/Loader/DelegatingLoaderTest.php

@@ -0,0 +1,71 @@
+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <fabien@symfony.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\Component\Config\Tests\Loader;
+
+use PHPUnit\Framework\TestCase;
+use Symfony\Component\Config\Loader\DelegatingLoader;
+use Symfony\Component\Config\Loader\LoaderResolver;
+
+class DelegatingLoaderTest extends TestCase
+{
+    public function testConstructor()
+    {
+        $loader = new DelegatingLoader($resolver = new LoaderResolver());
+        $this->assertTrue(true, '__construct() takes a loader resolver as its first argument');
+    }
+
+    public function testGetSetResolver()
+    {
+        $resolver = new LoaderResolver();
+        $loader = new DelegatingLoader($resolver);
+        $this->assertSame($resolver, $loader->getResolver(), '->getResolver() gets the resolver loader');
+        $loader->setResolver($resolver = new LoaderResolver());
+        $this->assertSame($resolver, $loader->getResolver(), '->setResolver() sets the resolver loader');
+    }
+
+    public function testSupports()
+    {
+        $loader1 = $this->getMockBuilder('Symfony\Component\Config\Loader\LoaderInterface')->getMock();
+        $loader1->expects($this->once())->method('supports')->will($this->returnValue(true));
+        $loader = new DelegatingLoader(new LoaderResolver(array($loader1)));
+        $this->assertTrue($loader->supports('foo.xml'), '->supports() returns true if the resource is loadable');
+
+        $loader1 = $this->getMockBuilder('Symfony\Component\Config\Loader\LoaderInterface')->getMock();
+        $loader1->expects($this->once())->method('supports')->will($this->returnValue(false));
+        $loader = new DelegatingLoader(new LoaderResolver(array($loader1)));
+        $this->assertFalse($loader->supports('foo.foo'), '->supports() returns false if the resource is not loadable');
+    }
+
+    public function testLoad()
+    {
+        $loader = $this->getMockBuilder('Symfony\Component\Config\Loader\LoaderInterface')->getMock();
+        $loader->expects($this->once())->method('supports')->will($this->returnValue(true));
+        $loader->expects($this->once())->method('load');
+        $resolver = new LoaderResolver(array($loader));
+        $loader = new DelegatingLoader($resolver);
+
+        $loader->load('foo');
+    }
+
+    /**
+     * @expectedException \Symfony\Component\Config\Exception\FileLoaderLoadException
+     */
+    public function testLoadThrowsAnExceptionIfTheResourceCannotBeLoaded()
+    {
+        $loader = $this->getMockBuilder('Symfony\Component\Config\Loader\LoaderInterface')->getMock();
+        $loader->expects($this->once())->method('supports')->will($this->returnValue(false));
+        $resolver = new LoaderResolver(array($loader));
+        $loader = new DelegatingLoader($resolver);
+
+        $loader->load('foo');
+    }
+}

vendor/symfony/config/Tests/Loader/FileLoaderTest.php

@@ -0,0 +1,128 @@
+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <fabien@symfony.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\Component\Config\Tests\Loader;
+
+use PHPUnit\Framework\TestCase;
+use Symfony\Component\Config\FileLocator;
+use Symfony\Component\Config\Loader\FileLoader;
+use Symfony\Component\Config\Loader\LoaderResolver;
+
+class FileLoaderTest extends TestCase
+{
+    public function testImportWithFileLocatorDelegation()
+    {
+        $locatorMock = $this->getMockBuilder('Symfony\Component\Config\FileLocatorInterface')->getMock();
+
+        $locatorMockForAdditionalLoader = $this->getMockBuilder('Symfony\Component\Config\FileLocatorInterface')->getMock();
+        $locatorMockForAdditionalLoader->expects($this->any())->method('locate')->will($this->onConsecutiveCalls(
+                array('path/to/file1'),                    // Default
+                array('path/to/file1', 'path/to/file2'),   // First is imported
+                array('path/to/file1', 'path/to/file2'),   // Second is imported
+                array('path/to/file1'),                    // Exception
+                array('path/to/file1', 'path/to/file2')    // Exception
+                ));
+
+        $fileLoader = new TestFileLoader($locatorMock);
+        $fileLoader->setSupports(false);
+        $fileLoader->setCurrentDir('.');
+
+        $additionalLoader = new TestFileLoader($locatorMockForAdditionalLoader);
+        $additionalLoader->setCurrentDir('.');
+
+        $fileLoader->setResolver($loaderResolver = new LoaderResolver(array($fileLoader, $additionalLoader)));
+
+        // Default case
+        $this->assertSame('path/to/file1', $fileLoader->import('my_resource'));
+
+        // Check first file is imported if not already loading
+        $this->assertSame('path/to/file1', $fileLoader->import('my_resource'));
+
+        // Check second file is imported if first is already loading
+        $fileLoader->addLoading('path/to/file1');
+        $this->assertSame('path/to/file2', $fileLoader->import('my_resource'));
+
+        // Check exception throws if first (and only available) file is already loading
+        try {
+            $fileLoader->import('my_resource');
+            $this->fail('->import() throws a FileLoaderImportCircularReferenceException if the resource is already loading');
+        } catch (\Exception $e) {
+            $this->assertInstanceOf('Symfony\Component\Config\Exception\FileLoaderImportCircularReferenceException', $e, '->import() throws a FileLoaderImportCircularReferenceException if the resource is already loading');
+        }
+
+        // Check exception throws if all files are already loading
+        try {
+            $fileLoader->addLoading('path/to/file2');
+            $fileLoader->import('my_resource');
+            $this->fail('->import() throws a FileLoaderImportCircularReferenceException if the resource is already loading');
+        } catch (\Exception $e) {
+            $this->assertInstanceOf('Symfony\Component\Config\Exception\FileLoaderImportCircularReferenceException', $e, '->import() throws a FileLoaderImportCircularReferenceException if the resource is already loading');
+        }
+    }
+
+    public function testImportWithGlobLikeResource()
+    {
+        $locatorMock = $this->getMockBuilder('Symfony\Component\Config\FileLocatorInterface')->getMock();
+        $loader = new TestFileLoader($locatorMock);
+
+        $this->assertSame('[foo]', $loader->import('[foo]'));
+    }
+
+    public function testImportWithNoGlobMatch()
+    {
+        $locatorMock = $this->getMockBuilder('Symfony\Component\Config\FileLocatorInterface')->getMock();
+        $loader = new TestFileLoader($locatorMock);
+
+        $this->assertNull($loader->import('./*.abc'));
+    }
+
+    public function testImportWithSimpleGlob()
+    {
+        $loader = new TestFileLoader(new FileLocator(__DIR__));
+
+        $this->assertSame(__FILE__, strtr($loader->import('FileLoaderTest.*'), '/', \DIRECTORY_SEPARATOR));
+    }
+}
+
+class TestFileLoader extends FileLoader
+{
+    private $supports = true;
+
+    public function load($resource, $type = null)
+    {
+        return $resource;
+    }
+
+    public function supports($resource, $type = null)
+    {
+        return $this->supports;
+    }
+
+    public function addLoading($resource)
+    {
+        self::$loading[$resource] = true;
+    }
+
+    public function removeLoading($resource)
+    {
+        unset(self::$loading[$resource]);
+    }
+
+    public function clearLoading()
+    {
+        self::$loading = array();
+    }
+
+    public function setSupports($supports)
+    {
+        $this->supports = $supports;
+    }
+}

vendor/symfony/config/Tests/Loader/LoaderResolverTest.php

@@ -0,0 +1,47 @@
+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <fabien@symfony.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\Component\Config\Tests\Loader;
+
+use PHPUnit\Framework\TestCase;
+use Symfony\Component\Config\Loader\LoaderResolver;
+
+class LoaderResolverTest extends TestCase
+{
+    public function testConstructor()
+    {
+        $resolver = new LoaderResolver(array(
+            $loader = $this->getMockBuilder('Symfony\Component\Config\Loader\LoaderInterface')->getMock(),
+        ));
+
+        $this->assertEquals(array($loader), $resolver->getLoaders(), '__construct() takes an array of loaders as its first argument');
+    }
+
+    public function testResolve()
+    {
+        $loader = $this->getMockBuilder('Symfony\Component\Config\Loader\LoaderInterface')->getMock();
+        $resolver = new LoaderResolver(array($loader));
+        $this->assertFalse($resolver->resolve('foo.foo'), '->resolve() returns false if no loader is able to load the resource');
+
+        $loader = $this->getMockBuilder('Symfony\Component\Config\Loader\LoaderInterface')->getMock();
+        $loader->expects($this->once())->method('supports')->will($this->returnValue(true));
+        $resolver = new LoaderResolver(array($loader));
+        $this->assertEquals($loader, $resolver->resolve(function () {}), '->resolve() returns the loader for the given resource');
+    }
+
+    public function testLoaders()
+    {
+        $resolver = new LoaderResolver();
+        $resolver->addLoader($loader = $this->getMockBuilder('Symfony\Component\Config\Loader\LoaderInterface')->getMock());
+
+        $this->assertEquals(array($loader), $resolver->getLoaders(), 'addLoader() adds a loader');
+    }
+}

vendor/symfony/config/Tests/Loader/LoaderTest.php

@@ -0,0 +1,118 @@
+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <fabien@symfony.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\Component\Config\Tests\Loader;
+
+use PHPUnit\Framework\TestCase;
+use Symfony\Component\Config\Loader\Loader;
+
+class LoaderTest extends TestCase
+{
+    public function testGetSetResolver()
+    {
+        $resolver = $this->getMockBuilder('Symfony\Component\Config\Loader\LoaderResolverInterface')->getMock();
+
+        $loader = new ProjectLoader1();
+        $loader->setResolver($resolver);
+
+        $this->assertSame($resolver, $loader->getResolver(), '->setResolver() sets the resolver loader');
+    }
+
+    public function testResolve()
+    {
+        $resolvedLoader = $this->getMockBuilder('Symfony\Component\Config\Loader\LoaderInterface')->getMock();
+
+        $resolver = $this->getMockBuilder('Symfony\Component\Config\Loader\LoaderResolverInterface')->getMock();
+        $resolver->expects($this->once())
+            ->method('resolve')
+            ->with('foo.xml')
+            ->will($this->returnValue($resolvedLoader));
+
+        $loader = new ProjectLoader1();
+        $loader->setResolver($resolver);
+
+        $this->assertSame($loader, $loader->resolve('foo.foo'), '->resolve() finds a loader');
+        $this->assertSame($resolvedLoader, $loader->resolve('foo.xml'), '->resolve() finds a loader');
+    }
+
+    /**
+     * @expectedException \Symfony\Component\Config\Exception\FileLoaderLoadException
+     */
+    public function testResolveWhenResolverCannotFindLoader()
+    {
+        $resolver = $this->getMockBuilder('Symfony\Component\Config\Loader\LoaderResolverInterface')->getMock();
+        $resolver->expects($this->once())
+            ->method('resolve')
+            ->with('FOOBAR')
+            ->will($this->returnValue(false));
+
+        $loader = new ProjectLoader1();
+        $loader->setResolver($resolver);
+
+        $loader->resolve('FOOBAR');
+    }
+
+    public function testImport()
+    {
+        $resolvedLoader = $this->getMockBuilder('Symfony\Component\Config\Loader\LoaderInterface')->getMock();
+        $resolvedLoader->expects($this->once())
+            ->method('load')
+            ->with('foo')
+            ->will($this->returnValue('yes'));
+
+        $resolver = $this->getMockBuilder('Symfony\Component\Config\Loader\LoaderResolverInterface')->getMock();
+        $resolver->expects($this->once())
+            ->method('resolve')
+            ->with('foo')
+            ->will($this->returnValue($resolvedLoader));
+
+        $loader = new ProjectLoader1();
+        $loader->setResolver($resolver);
+
+        $this->assertEquals('yes', $loader->import('foo'));
+    }
+
+    public function testImportWithType()
+    {
+        $resolvedLoader = $this->getMockBuilder('Symfony\Component\Config\Loader\LoaderInterface')->getMock();
+        $resolvedLoader->expects($this->once())
+            ->method('load')
+            ->with('foo', 'bar')
+            ->will($this->returnValue('yes'));
+
+        $resolver = $this->getMockBuilder('Symfony\Component\Config\Loader\LoaderResolverInterface')->getMock();
+        $resolver->expects($this->once())
+            ->method('resolve')
+            ->with('foo', 'bar')
+            ->will($this->returnValue($resolvedLoader));
+
+        $loader = new ProjectLoader1();
+        $loader->setResolver($resolver);
+
+        $this->assertEquals('yes', $loader->import('foo', 'bar'));
+    }
+}
+
+class ProjectLoader1 extends Loader
+{
+    public function load($resource, $type = null)
+    {
+    }
+
+    public function supports($resource, $type = null)
+    {
+        return \is_string($resource) && 'foo' === pathinfo($resource, PATHINFO_EXTENSION);
+    }
+
+    public function getType()
+    {
+    }
+}

vendor/symfony/config/Tests/Resource/ClassExistenceResourceTest.php

@@ -0,0 +1,100 @@
+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <fabien@symfony.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\Component\Config\Tests\Resource;
+
+use PHPUnit\Framework\TestCase;
+use Symfony\Component\Config\Resource\ClassExistenceResource;
+use Symfony\Component\Config\Tests\Fixtures\BadParent;
+use Symfony\Component\Config\Tests\Fixtures\Resource\ConditionalClass;
+
+class ClassExistenceResourceTest extends TestCase
+{
+    public function testToString()
+    {
+        $res = new ClassExistenceResource('BarClass');
+        $this->assertSame('BarClass', (string) $res);
+    }
+
+    public function testGetResource()
+    {
+        $res = new ClassExistenceResource('BarClass');
+        $this->assertSame('BarClass', $res->getResource());
+    }
+
+    public function testIsFreshWhenClassDoesNotExist()
+    {
+        $res = new ClassExistenceResource('Symfony\Component\Config\Tests\Fixtures\BarClass');
+
+        $this->assertTrue($res->isFresh(time()));
+
+        eval(<<<EOF
+namespace Symfony\Component\Config\Tests\Fixtures;
+
+class BarClass
+{
+}
+EOF
+        );
+
+        $this->assertFalse($res->isFresh(time()));
+    }
+
+    public function testIsFreshWhenClassExists()
+    {
+        $res = new ClassExistenceResource('Symfony\Component\Config\Tests\Resource\ClassExistenceResourceTest');
+
+        $this->assertTrue($res->isFresh(time()));
+    }
+
+    public function testExistsKo()
+    {
+        spl_autoload_register($autoloader = function ($class) use (&$loadedClass) { $loadedClass = $class; });
+
+        try {
+            $res = new ClassExistenceResource('MissingFooClass');
+            $this->assertTrue($res->isFresh(0));
+
+            $this->assertSame('MissingFooClass', $loadedClass);
+
+            $loadedClass = 123;
+
+            $res = new ClassExistenceResource('MissingFooClass', false);
+
+            $this->assertSame(123, $loadedClass);
+        } finally {
+            spl_autoload_unregister($autoloader);
+        }
+    }
+
+    public function testBadParentWithTimestamp()
+    {
+        $res = new ClassExistenceResource(BadParent::class, false);
+        $this->assertTrue($res->isFresh(time()));
+    }
+
+    /**
+     * @expectedException \ReflectionException
+     * @expectedExceptionMessage Class Symfony\Component\Config\Tests\Fixtures\MissingParent not found
+     */
+    public function testBadParentWithNoTimestamp()
+    {
+        $res = new ClassExistenceResource(BadParent::class, false);
+        $res->isFresh(0);
+    }
+
+    public function testConditionalClass()
+    {
+        $res = new ClassExistenceResource(ConditionalClass::class, false);
+
+        $this->assertFalse($res->isFresh(0));
+    }
+}

vendor/symfony/config/Tests/Resource/ComposerResourceTest.php

@@ -0,0 +1,47 @@
+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <fabien@symfony.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\Component\Config\Tests\Resource;
+
+use Composer\Autoload\ClassLoader;
+use PHPUnit\Framework\TestCase;
+use Symfony\Component\Config\Resource\ComposerResource;
+
+class ComposerResourceTest extends TestCase
+{
+    public function testGetVendor()
+    {
+        $res = new ComposerResource();
+
+        $r = new \ReflectionClass(ClassLoader::class);
+        $found = false;
+
+        foreach ($res->getVendors() as $vendor) {
+            if ($vendor && 0 === strpos($r->getFileName(), $vendor)) {
+                $found = true;
+                break;
+            }
+        }
+
+        $this->assertTrue($found);
+    }
+
+    public function testSerializeUnserialize()
+    {
+        $res = new ComposerResource();
+        $ser = unserialize(serialize($res));
+
+        $this->assertTrue($res->isFresh(0));
+        $this->assertTrue($ser->isFresh(0));
+
+        $this->assertEquals($res, $ser);
+    }
+}

vendor/symfony/config/Tests/Resource/DirectoryResourceTest.php

@@ -0,0 +1,183 @@
+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <fabien@symfony.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\Component\Config\Tests\Resource;
+
+use PHPUnit\Framework\TestCase;
+use Symfony\Component\Config\Resource\DirectoryResource;
+
+class DirectoryResourceTest extends TestCase
+{
+    protected $directory;
+
+    protected function setUp()
+    {
+        $this->directory = sys_get_temp_dir().\DIRECTORY_SEPARATOR.'symfonyDirectoryIterator';
+        if (!file_exists($this->directory)) {
+            mkdir($this->directory);
+        }
+        touch($this->directory.'/tmp.xml');
+    }
+
+    protected function tearDown()
+    {
+        if (!is_dir($this->directory)) {
+            return;
+        }
+        $this->removeDirectory($this->directory);
+    }
+
+    protected function removeDirectory($directory)
+    {
+        $iterator = new \RecursiveIteratorIterator(new \RecursiveDirectoryIterator($directory), \RecursiveIteratorIterator::CHILD_FIRST);
+        foreach ($iterator as $path) {
+            if (preg_match('#[/\\\\]\.\.?$#', $path->__toString())) {
+                continue;
+            }
+            if ($path->isDir()) {
+                rmdir($path->__toString());
+            } else {
+                unlink($path->__toString());
+            }
+        }
+        rmdir($directory);
+    }
+
+    public function testGetResource()
+    {
+        $resource = new DirectoryResource($this->directory);
+        $this->assertSame(realpath($this->directory), $resource->getResource(), '->getResource() returns the path to the resource');
+    }
+
+    public function testGetPattern()
+    {
+        $resource = new DirectoryResource($this->directory, 'bar');
+        $this->assertEquals('bar', $resource->getPattern());
+    }
+
+    /**
+     * @expectedException \InvalidArgumentException
+     * @expectedExceptionMessageRegExp /The directory ".*" does not exist./
+     */
+    public function testResourceDoesNotExist()
+    {
+        $resource = new DirectoryResource('/____foo/foobar'.mt_rand(1, 999999));
+    }
+
+    public function testIsFresh()
+    {
+        $resource = new DirectoryResource($this->directory);
+        $this->assertTrue($resource->isFresh(time() + 10), '->isFresh() returns true if the resource has not changed');
+        $this->assertFalse($resource->isFresh(time() - 86400), '->isFresh() returns false if the resource has been updated');
+    }
+
+    public function testIsFreshForDeletedResources()
+    {
+        $resource = new DirectoryResource($this->directory);
+        $this->removeDirectory($this->directory);
+
+        $this->assertFalse($resource->isFresh(time()), '->isFresh() returns false if the resource does not exist');
+    }
+
+    public function testIsFreshUpdateFile()
+    {
+        $resource = new DirectoryResource($this->directory);
+        touch($this->directory.'/tmp.xml', time() + 20);
+        $this->assertFalse($resource->isFresh(time() + 10), '->isFresh() returns false if an existing file is modified');
+    }
+
+    public function testIsFreshNewFile()
+    {
+        $resource = new DirectoryResource($this->directory);
+        touch($this->directory.'/new.xml', time() + 20);
+        $this->assertFalse($resource->isFresh(time() + 10), '->isFresh() returns false if a new file is added');
+    }
+
+    public function testIsFreshNewFileWithDifferentPattern()
+    {
+        $resource = new DirectoryResource($this->directory, '/.xml$/');
+        touch($this->directory.'/new.yaml', time() + 20);
+        $this->assertTrue($resource->isFresh(time() + 10), '->isFresh() returns true if a new file with a non-matching pattern is added');
+    }
+
+    public function testIsFreshDeleteFile()
+    {
+        $resource = new DirectoryResource($this->directory);
+        $time = time();
+        sleep(1);
+        unlink($this->directory.'/tmp.xml');
+        $this->assertFalse($resource->isFresh($time), '->isFresh() returns false if an existing file is removed');
+    }
+
+    public function testIsFreshDeleteDirectory()
+    {
+        $resource = new DirectoryResource($this->directory);
+        $this->removeDirectory($this->directory);
+        $this->assertFalse($resource->isFresh(time()), '->isFresh() returns false if the whole resource is removed');
+    }
+
+    public function testIsFreshCreateFileInSubdirectory()
+    {
+        $subdirectory = $this->directory.'/subdirectory';
+        mkdir($subdirectory);
+
+        $resource = new DirectoryResource($this->directory);
+        $this->assertTrue($resource->isFresh(time() + 10), '->isFresh() returns true if an unmodified subdirectory exists');
+
+        touch($subdirectory.'/newfile.xml', time() + 20);
+        $this->assertFalse($resource->isFresh(time() + 10), '->isFresh() returns false if a new file in a subdirectory is added');
+    }
+
+    public function testIsFreshModifySubdirectory()
+    {
+        $resource = new DirectoryResource($this->directory);
+
+        $subdirectory = $this->directory.'/subdirectory';
+        mkdir($subdirectory);
+        touch($subdirectory, time() + 20);
+
+        $this->assertFalse($resource->isFresh(time() + 10), '->isFresh() returns false if a subdirectory is modified (e.g. a file gets deleted)');
+    }
+
+    public function testFilterRegexListNoMatch()
+    {
+        $resource = new DirectoryResource($this->directory, '/\.(foo|xml)$/');
+
+        touch($this->directory.'/new.bar', time() + 20);
+        $this->assertTrue($resource->isFresh(time() + 10), '->isFresh() returns true if a new file not matching the filter regex is created');
+    }
+
+    public function testFilterRegexListMatch()
+    {
+        $resource = new DirectoryResource($this->directory, '/\.(foo|xml)$/');
+
+        touch($this->directory.'/new.xml', time() + 20);
+        $this->assertFalse($resource->isFresh(time() + 10), '->isFresh() returns false if an new file matching the filter regex is created ');
+    }
+
+    public function testSerializeUnserialize()
+    {
+        $resource = new DirectoryResource($this->directory, '/\.(foo|xml)$/');
+
+        $unserialized = unserialize(serialize($resource));
+
+        $this->assertSame(realpath($this->directory), $resource->getResource());
+        $this->assertSame('/\.(foo|xml)$/', $resource->getPattern());
+    }
+
+    public function testResourcesWithDifferentPatternsAreDifferent()
+    {
+        $resourceA = new DirectoryResource($this->directory, '/.xml$/');
+        $resourceB = new DirectoryResource($this->directory, '/.yaml$/');
+
+        $this->assertCount(2, array_unique(array($resourceA, $resourceB)));
+    }
+}

vendor/symfony/config/Tests/Resource/FileExistenceResourceTest.php

@@ -0,0 +1,71 @@
+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <fabien@symfony.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\Component\Config\Tests\Resource;
+
+use PHPUnit\Framework\TestCase;
+use Symfony\Component\Config\Resource\FileExistenceResource;
+
+class FileExistenceResourceTest extends TestCase
+{
+    protected $resource;
+    protected $file;
+    protected $time;
+
+    protected function setUp()
+    {
+        $this->file = realpath(sys_get_temp_dir()).'/tmp.xml';
+        $this->time = time();
+        $this->resource = new FileExistenceResource($this->file);
+    }
+
+    protected function tearDown()
+    {
+        if (file_exists($this->file)) {
+            unlink($this->file);
+        }
+    }
+
+    public function testToString()
+    {
+        $this->assertSame($this->file, (string) $this->resource);
+    }
+
+    public function testGetResource()
+    {
+        $this->assertSame($this->file, $this->resource->getResource(), '->getResource() returns the path to the resource');
+    }
+
+    public function testIsFreshWithExistingResource()
+    {
+        touch($this->file, $this->time);
+        $serialized = serialize(new FileExistenceResource($this->file));
+
+        $resource = unserialize($serialized);
+        $this->assertTrue($resource->isFresh($this->time), '->isFresh() returns true if the resource is still present');
+
+        unlink($this->file);
+        $resource = unserialize($serialized);
+        $this->assertFalse($resource->isFresh($this->time), '->isFresh() returns false if the resource has been deleted');
+    }
+
+    public function testIsFreshWithAbsentResource()
+    {
+        $serialized = serialize(new FileExistenceResource($this->file));
+
+        $resource = unserialize($serialized);
+        $this->assertTrue($resource->isFresh($this->time), '->isFresh() returns true if the resource is still absent');
+
+        touch($this->file, $this->time);
+        $resource = unserialize($serialized);
+        $this->assertFalse($resource->isFresh($this->time), '->isFresh() returns false if the resource has been created');
+    }
+}

vendor/symfony/config/Tests/Resource/FileResourceTest.php

@@ -0,0 +1,85 @@
+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <fabien@symfony.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\Component\Config\Tests\Resource;
+
+use PHPUnit\Framework\TestCase;
+use Symfony\Component\Config\Resource\FileResource;
+
+class FileResourceTest extends TestCase
+{
+    protected $resource;
+    protected $file;
+    protected $time;
+
+    protected function setUp()
+    {
+        $this->file = sys_get_temp_dir().'/tmp.xml';
+        $this->time = time();
+        touch($this->file, $this->time);
+        $this->resource = new FileResource($this->file);
+    }
+
+    protected function tearDown()
+    {
+        if (!file_exists($this->file)) {
+            return;
+        }
+
+        unlink($this->file);
+    }
+
+    public function testGetResource()
+    {
+        $this->assertSame(realpath($this->file), $this->resource->getResource(), '->getResource() returns the path to the resource');
+    }
+
+    public function testGetResourceWithScheme()
+    {
+        $resource = new FileResource('file://'.$this->file);
+        $this->assertSame('file://'.$this->file, $resource->getResource(), '->getResource() returns the path to the schemed resource');
+    }
+
+    public function testToString()
+    {
+        $this->assertSame(realpath($this->file), (string) $this->resource);
+    }
+
+    /**
+     * @expectedException \InvalidArgumentException
+     * @expectedExceptionMessageRegExp /The file ".*" does not exist./
+     */
+    public function testResourceDoesNotExist()
+    {
+        $resource = new FileResource('/____foo/foobar'.mt_rand(1, 999999));
+    }
+
+    public function testIsFresh()
+    {
+        $this->assertTrue($this->resource->isFresh($this->time), '->isFresh() returns true if the resource has not changed in same second');
+        $this->assertTrue($this->resource->isFresh($this->time + 10), '->isFresh() returns true if the resource has not changed');
+        $this->assertFalse($this->resource->isFresh($this->time - 86400), '->isFresh() returns false if the resource has been updated');
+    }
+
+    public function testIsFreshForDeletedResources()
+    {
+        unlink($this->file);
+
+        $this->assertFalse($this->resource->isFresh($this->time), '->isFresh() returns false if the resource does not exist');
+    }
+
+    public function testSerializeUnserialize()
+    {
+        $unserialized = unserialize(serialize($this->resource));
+
+        $this->assertSame(realpath($this->file), $this->resource->getResource());
+    }
+}

vendor/symfony/config/Tests/Resource/GlobResourceTest.php

@@ -0,0 +1,114 @@
+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <fabien@symfony.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\Component\Config\Tests\Resource;
+
+use PHPUnit\Framework\TestCase;
+use Symfony\Component\Config\Resource\GlobResource;
+
+class GlobResourceTest extends TestCase
+{
+    protected function tearDown()
+    {
+        $dir = \dirname(__DIR__).'/Fixtures';
+        @rmdir($dir.'/TmpGlob');
+        @unlink($dir.'/TmpGlob');
+        @unlink($dir.'/Resource/TmpGlob');
+        touch($dir.'/Resource/.hiddenFile');
+    }
+
+    public function testIterator()
+    {
+        $dir = \dirname(__DIR__).\DIRECTORY_SEPARATOR.'Fixtures';
+        $resource = new GlobResource($dir, '/Resource', true);
+
+        $paths = iterator_to_array($resource);
+
+        $file = $dir.'/Resource'.\DIRECTORY_SEPARATOR.'ConditionalClass.php';
+        $this->assertEquals(array($file => new \SplFileInfo($file)), $paths);
+        $this->assertInstanceOf('SplFileInfo', current($paths));
+        $this->assertSame($dir, $resource->getPrefix());
+
+        $resource = new GlobResource($dir, '/**/Resource', true);
+
+        $paths = iterator_to_array($resource);
+
+        $file = $dir.\DIRECTORY_SEPARATOR.'Resource'.\DIRECTORY_SEPARATOR.'ConditionalClass.php';
+        $this->assertEquals(array($file => $file), $paths);
+        $this->assertInstanceOf('SplFileInfo', current($paths));
+        $this->assertSame($dir, $resource->getPrefix());
+    }
+
+    public function testIsFreshNonRecursiveDetectsNewFile()
+    {
+        $dir = \dirname(__DIR__).'/Fixtures';
+        $resource = new GlobResource($dir, '/*', false);
+
+        $this->assertTrue($resource->isFresh(0));
+
+        mkdir($dir.'/TmpGlob');
+        $this->assertTrue($resource->isFresh(0));
+
+        rmdir($dir.'/TmpGlob');
+        $this->assertTrue($resource->isFresh(0));
+
+        touch($dir.'/TmpGlob');
+        $this->assertFalse($resource->isFresh(0));
+
+        unlink($dir.'/TmpGlob');
+        $this->assertTrue($resource->isFresh(0));
+    }
+
+    public function testIsFreshNonRecursiveDetectsRemovedFile()
+    {
+        $dir = \dirname(__DIR__).'/Fixtures';
+        $resource = new GlobResource($dir, '/*', false);
+
+        touch($dir.'/TmpGlob');
+        touch($dir.'/.TmpGlob');
+        $this->assertTrue($resource->isFresh(0));
+
+        unlink($dir.'/.TmpGlob');
+        $this->assertTrue($resource->isFresh(0));
+
+        unlink($dir.'/TmpGlob');
+        $this->assertFalse($resource->isFresh(0));
+    }
+
+    public function testIsFreshRecursiveDetectsRemovedFile()
+    {
+        $dir = \dirname(__DIR__).'/Fixtures';
+        $resource = new GlobResource($dir, '/*', true);
+
+        touch($dir.'/Resource/TmpGlob');
+        $this->assertTrue($resource->isFresh(0));
+
+        unlink($dir.'/Resource/TmpGlob');
+        $this->assertFalse($resource->isFresh(0));
+
+        touch($dir.'/Resource/TmpGlob');
+        $this->assertTrue($resource->isFresh(0));
+
+        unlink($dir.'/Resource/.hiddenFile');
+        $this->assertTrue($resource->isFresh(0));
+    }
+
+    public function testIsFreshRecursiveDetectsNewFile()
+    {
+        $dir = \dirname(__DIR__).'/Fixtures';
+        $resource = new GlobResource($dir, '/*', true);
+
+        $this->assertTrue($resource->isFresh(0));
+
+        touch($dir.'/Resource/TmpGlob');
+        $this->assertFalse($resource->isFresh(0));
+    }
+}

vendor/symfony/config/Tests/Resource/ReflectionClassResourceTest.php

@@ -0,0 +1,189 @@
+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <fabien@symfony.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\Component\Config\Tests\Resource;
+
+use PHPUnit\Framework\TestCase;
+use Symfony\Component\Config\Resource\ReflectionClassResource;
+use Symfony\Component\DependencyInjection\ServiceSubscriberInterface;
+use Symfony\Component\EventDispatcher\EventSubscriberInterface;
+
+class ReflectionClassResourceTest extends TestCase
+{
+    public function testToString()
+    {
+        $res = new ReflectionClassResource(new \ReflectionClass('ErrorException'));
+
+        $this->assertSame('reflection.ErrorException', (string) $res);
+    }
+
+    public function testSerializeUnserialize()
+    {
+        $res = new ReflectionClassResource(new \ReflectionClass(DummyInterface::class));
+        $ser = unserialize(serialize($res));
+
+        $this->assertTrue($res->isFresh(0));
+        $this->assertTrue($ser->isFresh(0));
+
+        $this->assertSame((string) $res, (string) $ser);
+    }
+
+    public function testIsFresh()
+    {
+        $res = new ReflectionClassResource(new \ReflectionClass(__CLASS__));
+        $mtime = filemtime(__FILE__);
+
+        $this->assertTrue($res->isFresh($mtime), '->isFresh() returns true if the resource has not changed in same second');
+        $this->assertTrue($res->isFresh($mtime + 10), '->isFresh() returns true if the resource has not changed');
+        $this->assertTrue($res->isFresh($mtime - 86400), '->isFresh() returns true if the resource has not changed');
+    }
+
+    public function testIsFreshForDeletedResources()
+    {
+        $now = time();
+        $tmp = sys_get_temp_dir().'/tmp.php';
+        file_put_contents($tmp, '<?php class ReflectionClassResourceTestClass {}');
+        require $tmp;
+
+        $res = new ReflectionClassResource(new \ReflectionClass('ReflectionClassResourceTestClass'));
+        $this->assertTrue($res->isFresh($now));
+
+        unlink($tmp);
+        $this->assertFalse($res->isFresh($now), '->isFresh() returns false if the resource does not exist');
+    }
+
+    /**
+     * @dataProvider provideHashedSignature
+     */
+    public function testHashedSignature($changeExpected, $changedLine, $changedCode)
+    {
+        $code = <<<'EOPHP'
+/* 0*/
+/* 1*/  class %s extends ErrorException
+/* 2*/  {
+/* 3*/      const FOO = 123;
+/* 4*/
+/* 5*/      public $pub = array();
+/* 6*/
+/* 7*/      protected $prot;
+/* 8*/
+/* 9*/      private $priv;
+/*10*/
+/*11*/      public function pub($arg = null) {}
+/*12*/
+/*13*/      protected function prot($a = array()) {}
+/*14*/
+/*15*/      private function priv() {}
+/*16*/  }
+EOPHP;
+
+        static $expectedSignature, $generateSignature;
+
+        if (null === $expectedSignature) {
+            eval(sprintf($code, $class = 'Foo'.str_replace('.', '_', uniqid('', true))));
+            $r = new \ReflectionClass(ReflectionClassResource::class);
+            $generateSignature = $r->getMethod('generateSignature');
+            $generateSignature->setAccessible(true);
+            $generateSignature = $generateSignature->getClosure($r->newInstanceWithoutConstructor());
+            $expectedSignature = implode("\n", iterator_to_array($generateSignature(new \ReflectionClass($class))));
+        }
+
+        $code = explode("\n", $code);
+        $code[$changedLine] = $changedCode;
+        eval(sprintf(implode("\n", $code), $class = 'Foo'.str_replace('.', '_', uniqid('', true))));
+        $signature = implode("\n", iterator_to_array($generateSignature(new \ReflectionClass($class))));
+
+        if ($changeExpected) {
+            $this->assertNotSame($expectedSignature, $signature);
+        } else {
+            $this->assertSame($expectedSignature, $signature);
+        }
+    }
+
+    public function provideHashedSignature()
+    {
+        yield array(0, 0, "// line change\n\n");
+        yield array(1, 0, '/** class docblock */');
+        yield array(1, 1, 'abstract class %s');
+        yield array(1, 1, 'final class %s');
+        yield array(1, 1, 'class %s extends Exception');
+        yield array(1, 1, 'class %s implements '.DummyInterface::class);
+        yield array(1, 3, 'const FOO = 456;');
+        yield array(1, 3, 'const BAR = 123;');
+        yield array(1, 4, '/** pub docblock */');
+        yield array(1, 5, 'protected $pub = array();');
+        yield array(1, 5, 'public $pub = array(123);');
+        yield array(1, 6, '/** prot docblock */');
+        yield array(1, 7, 'private $prot;');
+        yield array(0, 8, '/** priv docblock */');
+        yield array(0, 9, 'private $priv = 123;');
+        yield array(1, 10, '/** pub docblock */');
+        if (\PHP_VERSION_ID >= 50600) {
+            yield array(1, 11, 'public function pub(...$arg) {}');
+        }
+        if (\PHP_VERSION_ID >= 70000) {
+            yield array(1, 11, 'public function pub($arg = null): Foo {}');
+        }
+        yield array(0, 11, "public function pub(\$arg = null) {\nreturn 123;\n}");
+        yield array(1, 12, '/** prot docblock */');
+        yield array(1, 13, 'protected function prot($a = array(123)) {}');
+        yield array(0, 14, '/** priv docblock */');
+        yield array(0, 15, '');
+    }
+
+    public function testEventSubscriber()
+    {
+        $res = new ReflectionClassResource(new \ReflectionClass(TestEventSubscriber::class));
+        $this->assertTrue($res->isFresh(0));
+
+        TestEventSubscriber::$subscribedEvents = array(123);
+        $this->assertFalse($res->isFresh(0));
+
+        $res = new ReflectionClassResource(new \ReflectionClass(TestEventSubscriber::class));
+        $this->assertTrue($res->isFresh(0));
+    }
+
+    public function testServiceSubscriber()
+    {
+        $res = new ReflectionClassResource(new \ReflectionClass(TestServiceSubscriber::class));
+        $this->assertTrue($res->isFresh(0));
+
+        TestServiceSubscriber::$subscribedServices = array(123);
+        $this->assertFalse($res->isFresh(0));
+
+        $res = new ReflectionClassResource(new \ReflectionClass(TestServiceSubscriber::class));
+        $this->assertTrue($res->isFresh(0));
+    }
+}
+
+interface DummyInterface
+{
+}
+
+class TestEventSubscriber implements EventSubscriberInterface
+{
+    public static $subscribedEvents = array();
+
+    public static function getSubscribedEvents()
+    {
+        return self::$subscribedEvents;
+    }
+}
+
+class TestServiceSubscriber implements ServiceSubscriberInterface
+{
+    public static $subscribedServices = array();
+
+    public static function getSubscribedServices()
+    {
+        return self::$subscribedServices;
+    }
+}

vendor/symfony/config/Tests/Resource/ResourceStub.php

@@ -0,0 +1,34 @@
+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <fabien@symfony.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\Component\Config\Tests\Resource;
+
+use Symfony\Component\Config\Resource\SelfCheckingResourceInterface;
+
+class ResourceStub implements SelfCheckingResourceInterface
+{
+    private $fresh = true;
+
+    public function setFresh($isFresh)
+    {
+        $this->fresh = $isFresh;
+    }
+
+    public function __toString()
+    {
+        return 'stub';
+    }
+
+    public function isFresh($timestamp)
+    {
+        return $this->fresh;
+    }
+}

vendor/symfony/config/Tests/ResourceCheckerConfigCacheTest.php

@@ -0,0 +1,150 @@
+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <fabien@symfony.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\Component\Config\Tests;
+
+use PHPUnit\Framework\TestCase;
+use Symfony\Component\Config\Resource\FileResource;
+use Symfony\Component\Config\ResourceCheckerConfigCache;
+use Symfony\Component\Config\Tests\Resource\ResourceStub;
+
+class ResourceCheckerConfigCacheTest extends TestCase
+{
+    private $cacheFile = null;
+
+    protected function setUp()
+    {
+        $this->cacheFile = tempnam(sys_get_temp_dir(), 'config_');
+    }
+
+    protected function tearDown()
+    {
+        $files = array($this->cacheFile, "{$this->cacheFile}.meta");
+
+        foreach ($files as $file) {
+            if (file_exists($file)) {
+                unlink($file);
+            }
+        }
+    }
+
+    public function testGetPath()
+    {
+        $cache = new ResourceCheckerConfigCache($this->cacheFile);
+
+        $this->assertSame($this->cacheFile, $cache->getPath());
+    }
+
+    public function testCacheIsNotFreshIfEmpty()
+    {
+        $checker = $this->getMockBuilder('\Symfony\Component\Config\ResourceCheckerInterface')->getMock()
+            ->expects($this->never())->method('supports');
+
+        /* If there is nothing in the cache, it needs to be filled (and thus it's not fresh).
+            It does not matter if you provide checkers or not. */
+
+        unlink($this->cacheFile); // remove tempnam() side effect
+        $cache = new ResourceCheckerConfigCache($this->cacheFile, array($checker));
+
+        $this->assertFalse($cache->isFresh());
+    }
+
+    public function testCacheIsFreshIfNoCheckerProvided()
+    {
+        /* For example in prod mode, you may choose not to run any checkers
+           at all. In that case, the cache should always be considered fresh. */
+        $cache = new ResourceCheckerConfigCache($this->cacheFile);
+        $this->assertTrue($cache->isFresh());
+    }
+
+    public function testCacheIsFreshIfEmptyCheckerIteratorProvided()
+    {
+        $cache = new ResourceCheckerConfigCache($this->cacheFile, new \ArrayIterator(array()));
+        $this->assertTrue($cache->isFresh());
+    }
+
+    public function testResourcesWithoutcheckersAreIgnoredAndConsideredFresh()
+    {
+        /* As in the previous test, but this time we have a resource. */
+        $cache = new ResourceCheckerConfigCache($this->cacheFile);
+        $cache->write('', array(new ResourceStub()));
+
+        $this->assertTrue($cache->isFresh()); // no (matching) ResourceChecker passed
+    }
+
+    public function testIsFreshWithchecker()
+    {
+        $checker = $this->getMockBuilder('\Symfony\Component\Config\ResourceCheckerInterface')->getMock();
+
+        $checker->expects($this->once())
+                  ->method('supports')
+                  ->willReturn(true);
+
+        $checker->expects($this->once())
+                  ->method('isFresh')
+                  ->willReturn(true);
+
+        $cache = new ResourceCheckerConfigCache($this->cacheFile, array($checker));
+        $cache->write('', array(new ResourceStub()));
+
+        $this->assertTrue($cache->isFresh());
+    }
+
+    public function testIsNotFreshWithchecker()
+    {
+        $checker = $this->getMockBuilder('\Symfony\Component\Config\ResourceCheckerInterface')->getMock();
+
+        $checker->expects($this->once())
+                  ->method('supports')
+                  ->willReturn(true);
+
+        $checker->expects($this->once())
+                  ->method('isFresh')
+                  ->willReturn(false);
+
+        $cache = new ResourceCheckerConfigCache($this->cacheFile, array($checker));
+        $cache->write('', array(new ResourceStub()));
+
+        $this->assertFalse($cache->isFresh());
+    }
+
+    public function testCacheIsNotFreshWhenUnserializeFails()
+    {
+        $checker = $this->getMockBuilder('\Symfony\Component\Config\ResourceCheckerInterface')->getMock();
+        $cache = new ResourceCheckerConfigCache($this->cacheFile, array($checker));
+        $cache->write('foo', array(new FileResource(__FILE__)));
+
+        $metaFile = "{$this->cacheFile}.meta";
+        file_put_contents($metaFile, str_replace('FileResource', 'ClassNotHere', file_get_contents($metaFile)));
+
+        $this->assertFalse($cache->isFresh());
+    }
+
+    public function testCacheKeepsContent()
+    {
+        $cache = new ResourceCheckerConfigCache($this->cacheFile);
+        $cache->write('FOOBAR');
+
+        $this->assertSame('FOOBAR', file_get_contents($cache->getPath()));
+    }
+
+    public function testCacheIsNotFreshIfNotExistsMetaFile()
+    {
+        $checker = $this->getMockBuilder('\Symfony\Component\Config\ResourceCheckerInterface')->getMock();
+        $cache = new ResourceCheckerConfigCache($this->cacheFile, array($checker));
+        $cache->write('foo', array(new FileResource(__FILE__)));
+
+        $metaFile = "{$this->cacheFile}.meta";
+        unlink($metaFile);
+
+        $this->assertFalse($cache->isFresh());
+    }
+}

vendor/symfony/config/Tests/Util/XmlUtilsTest.php

@@ -0,0 +1,217 @@
+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <fabien@symfony.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\Component\Config\Tests\Util;
+
+use PHPUnit\Framework\TestCase;
+use Symfony\Component\Config\Util\XmlUtils;
+
+class XmlUtilsTest extends TestCase
+{
+    public function testLoadFile()
+    {
+        $fixtures = __DIR__.'/../Fixtures/Util/';
+
+        try {
+            XmlUtils::loadFile($fixtures.'invalid.xml');
+            $this->fail();
+        } catch (\InvalidArgumentException $e) {
+            $this->assertContains('ERROR 77', $e->getMessage());
+        }
+
+        try {
+            XmlUtils::loadFile($fixtures.'document_type.xml');
+            $this->fail();
+        } catch (\InvalidArgumentException $e) {
+            $this->assertContains('Document types are not allowed', $e->getMessage());
+        }
+
+        try {
+            XmlUtils::loadFile($fixtures.'invalid_schema.xml', $fixtures.'schema.xsd');
+            $this->fail();
+        } catch (\InvalidArgumentException $e) {
+            $this->assertContains('ERROR 1845', $e->getMessage());
+        }
+
+        try {
+            XmlUtils::loadFile($fixtures.'invalid_schema.xml', 'invalid_callback_or_file');
+            $this->fail();
+        } catch (\InvalidArgumentException $e) {
+            $this->assertContains('XSD file or callable', $e->getMessage());
+        }
+
+        $mock = $this->getMockBuilder(__NAMESPACE__.'\Validator')->getMock();
+        $mock->expects($this->exactly(2))->method('validate')->will($this->onConsecutiveCalls(false, true));
+
+        try {
+            XmlUtils::loadFile($fixtures.'valid.xml', array($mock, 'validate'));
+            $this->fail();
+        } catch (\InvalidArgumentException $e) {
+            $this->assertRegExp('/The XML file ".+" is not valid\./', $e->getMessage());
+        }
+
+        $this->assertInstanceOf('DOMDocument', XmlUtils::loadFile($fixtures.'valid.xml', array($mock, 'validate')));
+        $this->assertSame(array(), libxml_get_errors());
+    }
+
+    /**
+     * @expectedException \Symfony\Component\Config\Util\Exception\InvalidXmlException
+     * @expectedExceptionMessage The XML is not valid
+     */
+    public function testParseWithInvalidValidatorCallable()
+    {
+        $fixtures = __DIR__.'/../Fixtures/Util/';
+
+        $mock = $this->getMockBuilder(__NAMESPACE__.'\Validator')->getMock();
+        $mock->expects($this->once())->method('validate')->willReturn(false);
+
+        XmlUtils::parse(file_get_contents($fixtures.'valid.xml'), array($mock, 'validate'));
+    }
+
+    public function testLoadFileWithInternalErrorsEnabled()
+    {
+        $internalErrors = libxml_use_internal_errors(true);
+
+        $this->assertSame(array(), libxml_get_errors());
+        $this->assertInstanceOf('DOMDocument', XmlUtils::loadFile(__DIR__.'/../Fixtures/Util/invalid_schema.xml'));
+        $this->assertSame(array(), libxml_get_errors());
+
+        libxml_clear_errors();
+        libxml_use_internal_errors($internalErrors);
+    }
+
+    /**
+     * @dataProvider getDataForConvertDomToArray
+     */
+    public function testConvertDomToArray($expected, $xml, $root = false, $checkPrefix = true)
+    {
+        $dom = new \DOMDocument();
+        $dom->loadXML($root ? $xml : '<root>'.$xml.'</root>');
+
+        $this->assertSame($expected, XmlUtils::convertDomElementToArray($dom->documentElement, $checkPrefix));
+    }
+
+    public function getDataForConvertDomToArray()
+    {
+        return array(
+            array(null, ''),
+            array('bar', 'bar'),
+            array(array('bar' => 'foobar'), '<foo bar="foobar" />', true),
+            array(array('foo' => null), '<foo />'),
+            array(array('foo' => 'bar'), '<foo>bar</foo>'),
+            array(array('foo' => array('foo' => 'bar')), '<foo foo="bar"/>'),
+            array(array('foo' => array('foo' => 0)), '<foo><foo>0</foo></foo>'),
+            array(array('foo' => array('foo' => 'bar')), '<foo><foo>bar</foo></foo>'),
+            array(array('foo' => array('foo' => 'bar', 'value' => 'text')), '<foo foo="bar">text</foo>'),
+            array(array('foo' => array('attr' => 'bar', 'foo' => 'text')), '<foo attr="bar"><foo>text</foo></foo>'),
+            array(array('foo' => array('bar', 'text')), '<foo>bar</foo><foo>text</foo>'),
+            array(array('foo' => array(array('foo' => 'bar'), array('foo' => 'text'))), '<foo foo="bar"/><foo foo="text" />'),
+            array(array('foo' => array('foo' => array('bar', 'text'))), '<foo foo="bar"><foo>text</foo></foo>'),
+            array(array('foo' => 'bar'), '<foo><!-- Comment -->bar</foo>'),
+            array(array('foo' => 'text'), '<foo xmlns:h="http://www.example.org/bar" h:bar="bar">text</foo>'),
+            array(array('foo' => array('bar' => 'bar', 'value' => 'text')), '<foo xmlns:h="http://www.example.org/bar" h:bar="bar">text</foo>', false, false),
+            array(array('attr' => 1, 'b' => 'hello'), '<foo:a xmlns:foo="http://www.example.org/foo" xmlns:h="http://www.example.org/bar" attr="1" h:bar="bar"><foo:b>hello</foo:b><h:c>2</h:c></foo:a>', true),
+        );
+    }
+
+    /**
+     * @dataProvider getDataForPhpize
+     */
+    public function testPhpize($expected, $value)
+    {
+        $this->assertSame($expected, XmlUtils::phpize($value));
+    }
+
+    public function getDataForPhpize()
+    {
+        return array(
+            array('', ''),
+            array(null, 'null'),
+            array(true, 'true'),
+            array(false, 'false'),
+            array(null, 'Null'),
+            array(true, 'True'),
+            array(false, 'False'),
+            array(0, '0'),
+            array(1, '1'),
+            array(-1, '-1'),
+            array(0777, '0777'),
+            array(255, '0xFF'),
+            array(100.0, '1e2'),
+            array(-120.0, '-1.2E2'),
+            array(-10100.1, '-10100.1'),
+            array('-10,100.1', '-10,100.1'),
+            array('1234 5678 9101 1121 3141', '1234 5678 9101 1121 3141'),
+            array('1,2,3,4', '1,2,3,4'),
+            array('11,22,33,44', '11,22,33,44'),
+            array('11,222,333,4', '11,222,333,4'),
+            array('1,222,333,444', '1,222,333,444'),
+            array('11,222,333,444', '11,222,333,444'),
+            array('111,222,333,444', '111,222,333,444'),
+            array('1111,2222,3333,4444,5555', '1111,2222,3333,4444,5555'),
+            array('foo', 'foo'),
+            array(6, '0b0110'),
+        );
+    }
+
+    public function testLoadEmptyXmlFile()
+    {
+        $file = __DIR__.'/../Fixtures/foo.xml';
+
+        if (method_exists($this, 'expectException')) {
+            $this->expectException('InvalidArgumentException');
+            $this->expectExceptionMessage(sprintf('File %s does not contain valid XML, it is empty.', $file));
+        } else {
+            $this->setExpectedException('InvalidArgumentException', sprintf('File %s does not contain valid XML, it is empty.', $file));
+        }
+
+        XmlUtils::loadFile($file);
+    }
+
+    // test for issue https://github.com/symfony/symfony/issues/9731
+    public function testLoadWrongEmptyXMLWithErrorHandler()
+    {
+        $originalDisableEntities = libxml_disable_entity_loader(false);
+        $errorReporting = error_reporting(-1);
+
+        set_error_handler(function ($errno, $errstr) {
+            throw new \Exception($errstr, $errno);
+        });
+
+        $file = __DIR__.'/../Fixtures/foo.xml';
+        try {
+            try {
+                XmlUtils::loadFile($file);
+                $this->fail('An exception should have been raised');
+            } catch (\InvalidArgumentException $e) {
+                $this->assertEquals(sprintf('File %s does not contain valid XML, it is empty.', $file), $e->getMessage());
+            }
+        } finally {
+            restore_error_handler();
+            error_reporting($errorReporting);
+        }
+
+        $disableEntities = libxml_disable_entity_loader(true);
+        libxml_disable_entity_loader($disableEntities);
+
+        libxml_disable_entity_loader($originalDisableEntities);
+
+        $this->assertFalse($disableEntities);
+
+        // should not throw an exception
+        XmlUtils::loadFile(__DIR__.'/../Fixtures/Util/valid.xml', __DIR__.'/../Fixtures/Util/schema.xsd');
+    }
+}
+
+interface Validator
+{
+    public function validate();
+}