tu crée une application de test dans ton dossier test qui extend de  WebTestCase
Exemple
```
<?php

namespace tests\SilexPress\Functionals;

use tests\SilexPress\SiteLexpressTestCase;

class LExpressApplicationTest extends SiteLexpressTestCase
{
    public function createApplication()
    {
        $app = parent::createApplication();

        // unset rules to be sure to fail
        unset($app['url_manager.rules']);

        return $app;
    }

    /**
     * @expectedException LogicException
     */
    public function testUrlManagerNoRules()
    {
        $this->app['url_manager'];
    }
}
```