public async Task Should_write_state_and_events_when_saved()
        {
            await sut.ActivateAsync(id, store);

            var event1   = new MyEvent();
            var event2   = new MyEvent();
            var newState = new MyDomainState();

            sut.RaiseEvent(event1);
            sut.RaiseEvent(event2);
            sut.UpdateState(newState);

            await sut.WriteAsync(A.Fake <ISemanticLog>());

            A.CallTo(() => persistence.WriteSnapshotAsync(newState))
            .MustHaveHappened();
            A.CallTo(() => persistence.WriteEventsAsync(A <IEnumerable <Envelope <IEvent> > > .That.Matches(x => x.Count() == 2)))
            .MustHaveHappened();

            Assert.Empty(sut.GetUncomittedEvents());
        }