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

vendor/symfony/yaml/Tests/YamlTest.php

@@ -0,0 +1,37 @@
+<?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\Yaml\Tests;
+
+use Symfony\Component\Yaml\Yaml;
+
+class YamlTest extends \PHPUnit_Framework_TestCase
+{
+    public function testParseAndDump()
+    {
+        $data = array('lorem' => 'ipsum', 'dolor' => 'sit');
+        $yml = Yaml::dump($data);
+        $parsed = Yaml::parse($yml);
+        $this->assertEquals($data, $parsed);
+    }
+
+    /**
+     * @group legacy
+     */
+    public function testLegacyParseFromFile()
+    {
+        $filename = __DIR__.'/Fixtures/index.yml';
+        $contents = file_get_contents($filename);
+        $parsedByFilename = Yaml::parse($filename);
+        $parsedByContents = Yaml::parse($contents);
+        $this->assertEquals($parsedByFilename, $parsedByContents);
+    }
+}