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

vendor/behat/mink/tests/Selector/CssSelectorTest.php

@@ -0,0 +1,41 @@
+<?php
+
+namespace Behat\Mink\Tests\Selector;
+
+use Behat\Mink\Selector\CssSelector;
+
+class CssSelectorTest extends \PHPUnit_Framework_TestCase
+{
+    protected function setUp()
+    {
+        if (!class_exists('Symfony\Component\CssSelector\CssSelector')) {
+            $this->markTestSkipped('Symfony2 CssSelector component not installed');
+        }
+    }
+
+    public function testSelector()
+    {
+        $selector = new CssSelector();
+
+        $this->assertEquals('descendant-or-self::h3', $selector->translateToXPath('h3'));
+        $this->assertEquals('descendant-or-self::h3/span', $selector->translateToXPath('h3 > span'));
+
+        if (interface_exists('Symfony\Component\CssSelector\XPath\TranslatorInterface')) {
+            // The rewritten component of Symfony 2.3 checks for attribute existence first for the class.
+            $expectation = "descendant-or-self::h3/*[@class and contains(concat(' ', normalize-space(@class), ' '), ' my_div ')]";
+        } else {
+            $expectation = "descendant-or-self::h3/*[contains(concat(' ', normalize-space(@class), ' '), ' my_div ')]";
+        }
+        $this->assertEquals($expectation, $selector->translateToXPath('h3 > .my_div'));
+    }
+
+    /**
+     * @expectedException \InvalidArgumentException
+     */
+    public function testThrowsForArrayLocator()
+    {
+        $selector = new CssSelector();
+
+        $selector->translateToXPath(array('h3'));
+    }
+}