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

vendor/behat/mink/driver-testsuite/tests/AbstractConfig.php

@@ -0,0 +1,83 @@
+<?php
+
+namespace Behat\Mink\Tests\Driver;
+
+use Behat\Mink\Driver\DriverInterface;
+
+abstract class AbstractConfig
+{
+    /**
+     * Creates driver instance.
+     *
+     * @return DriverInterface
+     */
+    abstract public function createDriver();
+
+    /**
+     * Map remote file path.
+     *
+     * @param string $file File path.
+     *
+     * @return string
+     */
+    public function mapRemoteFilePath($file)
+    {
+        if (!isset($_SERVER['TEST_MACHINE_BASE_PATH']) || !isset($_SERVER['DRIVER_MACHINE_BASE_PATH'])) {
+            return $file;
+        }
+
+        $pattern = '/^'.preg_quote($_SERVER['TEST_MACHINE_BASE_PATH'], '/').'/';
+        $basePath = $_SERVER['DRIVER_MACHINE_BASE_PATH'];
+
+        return preg_replace($pattern, $basePath, $file, 1);
+    }
+
+    /**
+     * Gets the base url to the fixture folder.
+     *
+     * @return string
+     */
+    public function getWebFixturesUrl()
+    {
+        return $_SERVER['WEB_FIXTURES_HOST'];
+    }
+
+    /**
+     * @param string $testCase The name of the TestCase class
+     * @param string $test     The name of the test method
+     *
+     * @return string|null A message explaining why the test should be skipped, or null to run the test.
+     */
+    public function skipMessage($testCase, $test)
+    {
+        if (!$this->supportsCss() && 0 === strpos($testCase, 'Behat\Mink\Tests\Driver\Css\\')) {
+            return 'This driver does not support CSS.';
+        }
+
+        if (!$this->supportsJs() && 0 === strpos($testCase, 'Behat\Mink\Tests\Driver\Js\\')) {
+            return 'This driver does not support JavaScript.';
+        }
+
+        return null;
+    }
+
+    /**
+     * Whether the JS tests should run or no.
+     *
+     * @return bool
+     */
+    protected function supportsJs()
+    {
+        return true;
+    }
+
+    /**
+     * Whether the CSS tests should run or no.
+     *
+     * @return bool
+     */
+    protected function supportsCss()
+    {
+        return false;
+    }
+}