minor #95 Do not require raven.dsn when a client_id is specified (lyrixx)

This PR was merged into the 2.6.x-dev branch.

Discussion
----------

Do not require raven.dsn when a client_id is specified

Right now, I have the following configuration. And as you can see, the raven.dsn
is useless here, are the client_id service is not buildt by the extension
but by myself.

```yml
monolog:
    handlers:
        raven:
            type: raven
            # useless, because we set-up a custom client, but we have to...
            dsn:  "%raven.dsn%"
            client_id: sensiolabs.toolkit.monolog.raven_client
```

So with with patch, we can use:

```yml
monolog:
    handlers:
        raven:
            type: raven
            client_id: sensiolabs.toolkit.monolog.raven_client
```

BTW, I don't know the target branch of this PR.

Commits
-------

55aaefd Do not require raven.dsn when a client_id is specified

Author: stof

DependencyInjection/Configuration.php

@@ -570,7 +570,7 @@ public function getConfigTreeBuilder()
                             ->thenInvalid('The token and user have to be specified to use a PushoverHandler')
                         ->end()
                         ->validate()
-                            ->ifTrue(function ($v) { return 'raven' === $v['type'] && !array_key_exists('dsn', $v); })
+                            ->ifTrue(function ($v) { return 'raven' === $v['type'] && !array_key_exists('dsn', $v) && null === $v['client_id']; })
                             ->thenInvalid('The DSN has to be specified to use a RavenHandler')
                         ->end()
                         ->validate()

DependencyInjection/MonologExtension.php

@@ -468,15 +468,14 @@ private function buildHandler(ContainerBuilder $container, $name, array $handler
             break;
 
         case 'raven':
-            $clientId = 'monolog.raven.client.' . sha1($handler['dsn']);
             if (null !== $handler['client_id']) {
                 $clientId = $handler['client_id'];
-            }
-            if (!$container->hasDefinition($clientId)) {
+            } else {
                 $client = new Definition("Raven_Client", array(
                     $handler['dsn']
                 ));
                 $client->setPublic(false);
+                $clientId = 'monolog.raven.client.'.sha1($handler['dsn']);
                 $container->setDefinition($clientId, $client);
             }
             $definition->setArguments(array(

Tests/DependencyInjection/MonologExtensionTest.php

@@ -210,16 +210,19 @@ public function testSocketHandler()
 
     }
 
-    public function testRavenHandler()
+    public function testRavenHandlerWhenConfigurationIsWrong()
     {
-        $dsn = 'http://43f6017361224d098402974103bfc53d:[email protected]:9000/1';
-
         try {
             $this->getContainer(array(array('handlers' => array('raven' => array('type' => 'raven')))));
             $this->fail();
         } catch (InvalidConfigurationException $e) {
             $this->assertContains('DSN', $e->getMessage());
         }
+    }
+
+    public function testRavenHandlerWhenADSNIsSpecified()
+    {
+        $dsn = 'http://43f6017361224d098402974103bfc53d:[email protected]:9000/1';
 
         $container = $this->getContainer(array(array('handlers' => array('raven' => array(
             'type' => 'raven', 'dsn' => $dsn)
@@ -234,15 +237,36 @@ public function testRavenHandler()
 
         $handler = $container->getDefinition('monolog.handler.raven');
         $this->assertDICDefinitionClass($handler, '%monolog.handler.raven.class%');
+    }
 
+    public function testRavenHandlerWhenADSNAndAClientAreSpecified()
+    {
         $container = $this->getContainer(array(array('handlers' => array('raven' => array(
-            'type' => 'raven', 'dsn' => $dsn, 'client_id' => 'raven.client')
+            'type' => 'raven', 'dsn' => 'foobar', 'client_id' => 'raven.client')
         ))));
 
-        $this->assertTrue($container->hasDefinition('raven.client'));
+        $this->assertFalse($container->hasDefinition('raven.client'));
+
+        $logger = $container->getDefinition('monolog.logger');
+        $this->assertDICDefinitionMethodCallAt(0, $logger, 'pushHandler', array(new Reference('monolog.handler.raven')));
 
-        $handler = $container->getDefinition('raven.client');
-        $this->assertDICDefinitionClass($handler, 'Raven_Client');
+        $handler = $container->getDefinition('monolog.handler.raven');
+        $this->assertDICConstructorArguments($handler, array(new Reference('raven.client'), 100, true));
+    }
+
+    public function testRavenHandlerWhenAClientIsSpecified()
+    {
+        $container = $this->getContainer(array(array('handlers' => array('raven' => array(
+            'type' => 'raven', 'client_id' => 'raven.client')
+        ))));
+
+        $this->assertFalse($container->hasDefinition('raven.client'));
+
+        $logger = $container->getDefinition('monolog.logger');
+        $this->assertDICDefinitionMethodCallAt(0, $logger, 'pushHandler', array(new Reference('monolog.handler.raven')));
+
+        $handler = $container->getDefinition('monolog.handler.raven');
+        $this->assertDICConstructorArguments($handler, array(new Reference('raven.client'), 100, true));
     }
 
     public function testLogglyHandler()