public function setUp()
{
$this->testHelper = new TestHelper($this);
$aggregateId = BasketId::fromString('some-id');
$this->eventId = $this->testHelper->mockIdentifier();
$this->event = $this->testHelper->mockEvent();
$this->envelope = EventEnvelope::envelop($this->eventId, 'some.name', $this->event, $aggregateId, 123);
}