registerBus example

public function testHandle()
    {
        $message = new DummyMessage('dummy message');
        $envelope = new Envelope($message);

        $bus = $this->createMock(MessageBusInterface::class);
        $bus->method('dispatch')->with($message)->willReturn($envelope);
        $bus = new TraceableMessageBus($bus);

        $collector = new MessengerDataCollector();
        $collector->registerBus('default', $bus);

        $bus->dispatch($message);

        $collector->lateCollect();

        $messages = $collector->getMessages();
        $this->assertCount(1, $messages);

        $file = __FILE__;
        $expected = <<<DUMP array:5 [ "bus" => "default" "stamps" => [] "stamps_after_dispatch" => [] "message" => array:2 [ "type" => "Symfony\Component\Messenger\Tests\Fixtures\DummyMessage" "value" => Symfony\Component\Messenger\Tests\Fixtures\DummyMessage %A -message: "dummy message" } ] "caller" => array:3 [ "name" => "MessengerDataCollectorTest.php" "file" => "