improve error message when using test client without the BrowserKit component

Author: xabbuh

DependencyInjection/FrameworkExtension.php

@@ -18,6 +18,7 @@
 use Symfony\Bundle\FrameworkBundle\Controller\Controller;
 use Symfony\Bundle\FrameworkBundle\Routing\AnnotatedRouteControllerLoader;
 use Symfony\Bundle\FullStack;
+use Symfony\Component\BrowserKit\Client;
 use Symfony\Component\Cache\Adapter\AbstractAdapter;
 use Symfony\Component\Cache\Adapter\AdapterInterface;
 use Symfony\Component\Cache\Adapter\ArrayAdapter;
@@ -223,6 +224,10 @@ public function load(array $configs, ContainerBuilder $container)
             $container->getDefinition('test.client.history')->setPrivate(true);
             $container->getDefinition('test.client.cookiejar')->setPrivate(true);
             $container->getDefinition('test.session.listener')->setPrivate(true);
+
+            if (!class_exists(Client::class)) {
+                $container->removeDefinition('test.client');
+            }
         }
 
         if ($this->isConfigEnabled($container, $config['session'])) {

Test/WebTestCase.php

@@ -12,6 +12,7 @@
 namespace Symfony\Bundle\FrameworkBundle\Test;
 
 use Symfony\Bundle\FrameworkBundle\Client;
+use Symfony\Component\DependencyInjection\Exception\ServiceNotFoundException;
 
 /**
  * WebTestCase is the base class for functional tests.
@@ -32,7 +33,12 @@ protected static function createClient(array $options = array(), array $server =
     {
         $kernel = static::bootKernel($options);
 
-        $client = $kernel->getContainer()->get('test.client');
+        try {
+            $client = $kernel->getContainer()->get('test.client');
+        } catch (ServiceNotFoundException $e) {
+            throw new \LogicException('You cannot create the client used in functional tests if the BrowserKit component is not available. Try running "composer require symfony/browser-kit".');
+        }
+
         $client->setServerParameters($server);
 
         return $client;