Utilize the fast logout method for step definitions

- Also utilizes fast logout during user cleanup.
- Addresses #62

src/Drupal/DrupalExtension/Context/DrupalContext.php

@@ -27,9 +27,7 @@ public static function getTranslationResources() {
    */
   public function assertAnonymousUser() {
     // Verify the user is logged out.
-    if ($this->loggedIn()) {
-      $this->logout();
-    }
+    $this->logout(TRUE);
   }
 
   /**

src/Drupal/DrupalExtension/Context/RawDrupalContext.php

@@ -20,6 +20,7 @@
 use Drupal\DrupalExtension\Hook\Scope\BeforeNodeCreateScope;
 use Drupal\DrupalExtension\Hook\Scope\BeforeUserCreateScope;
 use Drupal\DrupalExtension\Hook\Scope\BeforeTermCreateScope;
+use Drupal\DrupalExtension\Manager\FastLogoutInterface;
 
 
 /**
@@ -251,9 +252,7 @@ public function cleanUsers() {
       }
       $this->getDriver()->processBatch();
       $this->userManager->clearUsers();
-      if ($this->loggedIn()) {
-        $this->logout();
-      }
+      $this->logout(TRUE);
     }
   }
 
@@ -511,9 +510,17 @@ public function login(\stdClass $user) {
 
   /**
    * Logs the current user out.
+   *
+   * @param bool $fast
+   *   Utilize direct logout by session if available.
    */
-  public function logout() {
-    $this->getAuthenticationManager()->logOut();
+  public function logout($fast = FALSE) {
+    if ($fast && $this->getAuthenticationManager() instanceof FastLogoutInterface) {
+      $this->getAuthenticationManager()->fastLogout();
+    }
+    else {
+      $this->getAuthenticationManager()->logOut();
+    }
   }
 
   /**

src/Drupal/DrupalExtension/Manager/DrupalAuthenticationManager.php

@@ -10,7 +10,7 @@
 /**
  * Default implementation of the Drupal authentication manager service.
  */
-class DrupalAuthenticationManager implements DrupalAuthenticationManagerInterface
+class DrupalAuthenticationManager implements DrupalAuthenticationManagerInterface, FastLogoutInterface
 {
 
     use DrupalParametersTrait;
@@ -124,12 +124,9 @@ public function loggedIn() {
     }
 
     /**
-     * Logs out by directly resetting the session.
-     *
-     * A fast logout method that resets the session and doesn't need to
-     * bootstrap Drupal. This should not be used if logout hooks need to fire.
+     * {@inheritdoc}
      */
-    protected function fastLogout()
+    public function fastLogout()
     {
         $this->getSession()->reset();
         $this->userManager->setCurrentUser(FALSE);

src/Drupal/DrupalExtension/Manager/FastLogoutInterface.php

@@ -0,0 +1,17 @@
+<?php
+
+namespace Drupal\DrupalExtension\Manager;
+
+/**
+ * Interface for authentication managers that support fast logout.
+ */
+interface FastLogoutInterface
+{
+    /**
+     * Logs out by directly resetting the session.
+     *
+     * A fast logout method that resets the session and doesn't need to
+     * bootstrap Drupal. This should not be used if logout hooks need to fire.
+     */
+    public function fastLogout();
+}