如何在功能测试中使用Profiler

class LuckyControllerTest extends WebTestCase
{
    public function testNumberAction()
    {
        $client = static::createClient();
 
        // Enable the profiler for the next request
        // (it does nothing if the profiler is not available)
        // 在下一次请求中开启分析器（如果分析器不可用则什么也不做）
        $client->enableProfiler();
 
        $crawler = $client->request('GET', '/lucky/number');
 
        // ... write some assertions about the Response
        // ... 编写一些关于Response的断言
 
        // Check that the profiler is enabled
        // 检查分析器的开启
        if ($profile = $client->getProfile()) {
            // check the number of requests
            // 检查请求的次数
            $this->assertLessThan(
                10,
                $profile->getCollector('db')->getQueryCount()
            );
 
            // check the time spent in the framework
            // 检查花在框架上的时间
            $this->assertLessThan(
                500,
                $profile->getCollector('time')->getDuration()
            );
        }
    }
}

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