Added dontSeeAuthentication function

Author: TavoNiievez

documentation.md

@@ -376,6 +376,20 @@ For checking the raw source code, use `seeInSource()`.
  * `param array|string` $selector optional
 
 
+### dontSeeAuthentication
+ 
+Check that user is not authenticated.
+You can specify whether users logged in with the 'remember me' option should be ignored by passing 'false' as a parameter.
+
+```php
+<?php
+$I->dontSeeAuthentication();
+$I->dontSeeAuthentication(false);
+```
+
+ * `param bool` $remembered
+
+
 ### dontSeeCheckboxIsChecked
 
 Check that the specified checkbox is unchecked.

src/Codeception/Module/Symfony.php

@@ -998,4 +998,38 @@ public function seeUserHasRole($role)
             )
         );
     }
+
+    /**
+     * Check that user is not authenticated.
+     * You can specify whether users logged in with the 'remember me' option should be ignored by passing 'false' as a parameter.
+     *
+     * ```php
+     * <?php
+     * $I->dontSeeAuthentication();
+     * ```
+     *
+     * @param bool $remembered
+     */
+    public function dontSeeAuthentication($remembered = true)
+    {
+        $container = $this->_getContainer();
+
+        if (!$container->has('security.helper')) {
+            $this->fail("Symfony container doesn't have 'security.helper' service");
+            return;
+        }
+
+        $security = $this->grabService('security.helper');
+
+        if ($remembered) {
+            $role = 'IS_AUTHENTICATED_REMEMBERED';
+        } else {
+            $role = 'IS_AUTHENTICATED_FULLY';
+        }
+
+        $this->assertFalse(
+            $security->isGranted($role),
+            'There is an user authenticated'
+        );
+    }
 }