BDD with MSpec and Machine Fakes

gistfile1.cs

        [Subject("Domain Events: Raising an event")]
        public class Raising_an_event
        {
            public class When_an_event_publisher_is_not_defined
            {
                Because of = ()
                    => new TestDomainObject().Start();

                It Should_do_nothing = () => { };
            }

            public class When_an_event_publisher_is_defined : WithFakes
            {
                static Action<IDomainEvent> eventPublisher;
                
                Because of = () =>
                {
                    eventPublisher = An<Action<IDomainEvent>>();
                    DomainEvents.RegisterEventPublisher(eventPublisher);

                    new TestDomainObject().Start();
                };

                It Should_raise_the_event = ()
                    => eventPublisher.WasToldTo(x => x.Invoke(Param.IsAny<IDomainEvent>()));
            }

            public class TestDomainObject
            {
                public void Start()
                {
                    DomainEvents.Raise(new TestDomainObjectStartedEvent());
                }
            }

            public class TestDomainObjectStartedEvent : IDomainEvent
            {

            }
        }

Output:

Domain Events: Raising an event, When an event publisher is not defined

• Should do nothing

Domain Events: Raising an event, When an event publisher is defined

• Should raise the event