public void ship_created_domain_event_is_raised()
{
_raisedDomainEvent.ShouldNotBeNull();
_raisedDomainEvent.ShouldBeOfType <ShipCreatedDomainEvent>();
var shipCreatedDomainEvent = (ShipCreatedDomainEvent)_raisedDomainEvent;
shipCreatedDomainEvent.ShipId.ShouldBe(_createdShipId);
}