Update to drupal 8.0.0-rc1. For more information, see https://www.drupal.org/node/2582663

vendor/symfony/dependency-injection/Tests/ReferenceTest.php

@@ -0,0 +1,32 @@
+<?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\DependencyInjection\Tests;
+
+use Symfony\Component\DependencyInjection\Reference;
+
+class ReferenceTest extends \PHPUnit_Framework_TestCase
+{
+    /**
+     * @covers Symfony\Component\DependencyInjection\Reference::__construct
+     */
+    public function testConstructor()
+    {
+        $ref = new Reference('foo');
+        $this->assertEquals('foo', (string) $ref, '__construct() sets the id of the reference, which is used for the __toString() method');
+    }
+
+    public function testCaseInsensitive()
+    {
+        $ref = new Reference('FooBar');
+        $this->assertEquals('foobar', (string) $ref, 'the id is lowercased as the container is case insensitive');
+    }
+}