Auto-detect and auto-activate installed wunit mink driver

Author: patrickdreyer

composer.json

@@ -14,7 +14,7 @@
 
     "require": {
         "php":          ">=5.3.2",
-        "behat/behat":  ">=2.4.0,<2.4.x-dev"
+        "behat/behat":  ">=2.4.1,<2.4.x-dev"
     },
 
     "autoload": {

src/Behat/YiiExtension/Extension.php

@@ -37,6 +37,11 @@ public function load(array $config, ContainerBuilder $container)
         $loader->load('yii.xml');
         $basePath = $container->getParameter('behat.paths.base');
 
+        // starting from Behat 2.4.1, we can check for activated extensions
+        $extensions = $container->hasParameter('behat.extension.classes')
+                    ? $container->getParameter('behat.extension.classes')
+                    : array();
+
         if (!isset($config['framework_script'])) {
             throw new \InvalidArgumentException(
                 'Specify `framework_script` parameter for yii_extension.'
@@ -64,6 +69,8 @@ public function load(array $config, ContainerBuilder $container)
                 );
             }
 
+            $loader->load('sessions/wunit.xml');
+        } elseif (in_array('Behat\\MinkExtension\\Extension', $extensions) && class_exists('Behat\\Mink\\Driver\\WUnitDriver')) {
             $loader->load('sessions/wunit.xml');
         }
     }