public function testWithMetaData()
{
$payload = new \stdClass();
$metaData = new MetaData(['key' => 'value']);
$message = new GenericEventMessage($payload, $metaData);
$message1 = $message->withMetaData();
$message2 = $message->withMetaData(['key' => 'otherValue']);
$this->assertEquals(0, $message1->getMetaData()->count());
$this->assertEquals(1, $message2->getMetaData()->count());
$this->assertEquals($message->getIdentifier(), $message1->getIdentifier());
$this->assertEquals($message->getIdentifier(), $message2->getIdentifier());
$this->assertInstanceOf(GenericEventMessage::class, $message1);
$this->assertInstanceOf(GenericEventMessage::class, $message2);
}
