class HelloControllerTest extends WebTestCase
{
    public function testIndex()
    {
        $client = static::createClient();

        // Enable the profiler for the next request (it does nothing if the profiler is not available)
        $client->enableProfiler();

        $crawler = $client->request('GET', '/hello/Fabien');

        // ... write some assertions about the Response

        // Check that the profiler is enabled
        if ($profile = $client->getProfile()) {
            // check the number of requests
            $this->assertLessThan(
                10,
                $profile->getCollector('db')->getQueryCount()
            );

            // check the time spent in the framework
            $this->assertLessThan(
                500,
                $profile->getCollector('time')->getDuration()
            );
        }
    }
}

$this->assertLessThan(
    30,
    $profile->get('db')->getQueryCount(),
    sprintf(
        'Checks that query count is less than 30 (token %s)',
        $profile->getToken()
    )
);