标题:如何在Symfony项目中高效测试消息队列？使用zenstruck/messenger-test库可以解决这个问题！

composer require --dev zenstruck/messenger-test

Zenstruck\Messenger\Test\ZenstruckMessengerTestBundle::class => ['test' => true],

when@test:
    framework:
        messenger:
            transports:
                async: test://

use Symfony\Bundle\FrameworkBundle\Test\KernelTestCase;
use Zenstruck\Messenger\Test\InteractsWithMessenger;

class MyTest extends KernelTestCase
{
    use InteractsWithMessenger;

    public function test_something(): void
    {
        // ...some code that routes messages to your configured transport

        // 断言队列为空
        $this->transport()->queue()->assertEmpty();

        // 断言队列不为空
        $this->transport()->queue()->assertNotEmpty();

        // 断言队列包含特定类型的消息
        $this->transport()->queue()->assertContains(MyMessage::class);
    }
}

public function test_something(): void
{
    // 假设队列中有3条消息
    $this->transport()->queue()->assertCount(3);

    // 处理一条消息
    $this->transport()->process(1);

    // 验证队列中剩余2条消息
    $this->transport()->queue()->assertCount(2);

    // 处理所有消息
    $this->transport()->process();

    // 验证队列为空
    $this->transport()->queue()->assertEmpty();
}