moved default session configuration and active sessions teardown into initializer

src/Behat/MinkExtension/Context/Initializer/MinkAwareInitializer.php

@@ -2,8 +2,12 @@
 
 namespace Behat\MinkExtension\Context\Initializer;
 
+use Symfony\Component\EventDispatcher\EventSubscriberInterface;
+
 use Behat\Behat\Context\Initializer\InitializerInterface,
-    Behat\Behat\Context\ContextInterface;
+    Behat\Behat\Context\ContextInterface,
+    Behat\Behat\Event\ScenarioEvent,
+    Behat\Behat\Event\OutlineEvent;
 
 use Behat\Mink\Mink;
 
@@ -23,7 +27,7 @@ use Behat\MinkExtension\Context\MinkAwareContextInterface;
  *
  * @author Konstantin Kudryashov <ever.zet@gmail.com>
  */
-class MinkAwareInitializer implements InitializerInterface
+class MinkAwareInitializer implements InitializerInterface, EventSubscriberInterface
 {
     private $mink;
     private $parameters;
@@ -40,6 +44,32 @@ class MinkAwareInitializer implements InitializerInterface
         $this->parameters = $parameters;
     }
 
+    /**
+     * Returns an array of event names this subscriber wants to listen to.
+     *
+     * The array keys are event names and the value can be:
+     *
+     *  * The method name to call (priority defaults to 0)
+     *  * An array composed of the method name to call and the priority
+     *  * An array of arrays composed of the method names to call and respective
+     *    priorities, or 0 if unset
+     *
+     * For instance:
+     *
+     *  * array('eventName' => 'methodName')
+     *  * array('eventName' => array('methodName', $priority))
+     *  * array('eventName' => array(array('methodName1', $priority), array('methodName2'))
+     *
+     * @return array The event names to listen to
+     */
+    static function getSubscribedEvents()
+    {
+        return array(
+            'beforeScenario' => 'prepareDefaultMinkSession',
+            'afterSuite'     => 'tearDownMinkSessions'
+        );
+    }
+
     /**
      * Checks if initializer supports provided context.
      *
@@ -75,4 +105,44 @@ class MinkAwareInitializer implements InitializerInterface
         $context->setMink($this->mink);
         $context->setMinkParameters($this->parameters);
     }
+
+    /**
+     * Configures default Mink session before each scenario.
+     * Configuration is based on scenario tags.
+     *
+     * `@javascript` tagged scenarios will get `javascript_session` as default session
+     * `@mink:CUSTOM_NAME tagged scenarios will get `CUSTOM_NAME` as default session
+     * Other scenarios get `default_session` as default session
+     *
+     * @param ScenarioEvent|OutlineEvent $event
+     */
+    public function prepareDefaultMinkSession($event)
+    {
+        $scenario = $event instanceof ScenarioEvent ? $event->getScenario() : $event->getOutline();
+        $session  = $this->parameters['default_session'];
+
+        foreach ($scenario->getTags() as $tag) {
+            if ('javascript' === $tag) {
+                $session = $this->parameters['javascript_session'];
+            } elseif (preg_match('/^mink\:(.+)/', $tag, $matches)) {
+                $session = $matches[1];
+            }
+        }
+
+        if ($scenario->hasTag('insulated')) {
+            $this->mink->stopSessions();
+        } else {
+            $this->mink->resetSessions();
+        }
+
+        $this->mink->setDefaultSessionName($session);
+    }
+
+    /**
+     * Stops all started Mink sessions.
+     */
+    public function tearDownMinkSessions()
+    {
+        $this->mink->stopSessions();
+    }
 }