SF2 functional test good practices

AppKernel.php

<?php

class AppKernel extends Kernel
{
    static protected $connection;

    public function boot()
    {
        parent::boot();

        if ('test' === $this->getEnvironment()) {
            if (null === static::$connection) {
                static::$connection = $this->getContainer()->get('doctrine.dbal.default_connection');
            } else {
                $this->getContainer()->set('doctrine.dbal.default_connection', static::$connection);
            }
        }
    }
}

WebTestCase.php

<?php

use Doctrine\Bundle\FixturesBundle\Command\LoadDataFixturesDoctrineCommand;
use Symfony\Bundle\FrameworkBundle\Console\Application;
use Symfony\Bundle\FrameworkBundle\Test\WebTestCase as BaseWebTestCase;

class WebTestCase extends BaseWebTestCase
{
    protected $client;
    protected $container;
    protected $em;

    public function setUp()
    {
        if (null !== $this->client) {
            $this->client->shutdown();
        }

        $this->client    = static::createClient();

        // Load fixtures (thx @FrancisBesset)
        $fixtures = new LoadDataFixturesDoctrineCommand();
        $fixtures->setApplication(new Application(static::$kernel));
        $fixtures->run(
            new ArrayInput(array(
                'doctrine:data:load',
            )),
            new NullOutput()
        );
    }
}