minor symfony#16718 [SecurityBundle] test legacy CSRF configuration options (xabbuh)

This PR was merged into the 2.8 branch.

Discussion
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[SecurityBundle] test legacy CSRF configuration options

| Q             | A
| ------------- | ---
| Bug fix?      | no
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | symfony#16704
| License       | MIT
| Doc PR        |

Commits
-------

444b6ef test legacy CSRF configuration options

Author: nicolas-grekas

src/Symfony/Bundle/SecurityBundle/Tests/DependencyInjection/MainConfigurationTest.php

@@ -91,6 +91,32 @@ public function testCsrfAliases()
         $this->assertEquals('a_token_id', $processedConfig['firewalls']['stub']['logout']['csrf_token_id']);
     }
 
+    /**
+     * @group legacy
+     */
+    public function testLegacyCsrfAliases()
+    {
+        $config = array(
+            'firewalls' => array(
+                'stub' => array(
+                    'logout' => array(
+                        'csrf_provider' => 'a_token_generator',
+                        'intention' => 'a_token_id',
+                    ),
+                ),
+            ),
+        );
+        $config = array_merge(static::$minimalConfig, $config);
+
+        $processor = new Processor();
+        $configuration = new MainConfiguration(array(), array());
+        $processedConfig = $processor->processConfiguration($configuration, array($config));
+        $this->assertTrue(isset($processedConfig['firewalls']['stub']['logout']['csrf_token_generator']));
+        $this->assertEquals('a_token_generator', $processedConfig['firewalls']['stub']['logout']['csrf_token_generator']);
+        $this->assertTrue(isset($processedConfig['firewalls']['stub']['logout']['csrf_token_id']));
+        $this->assertEquals('a_token_id', $processedConfig['firewalls']['stub']['logout']['csrf_token_id']);
+    }
+
     /**
      * @expectedException \InvalidArgumentException
      */