public async Task apply_stream_event_when_event_type_is_resolvable_and_update_state()
{
var mockEventResolver = new Mock <IBusinessEventResolver>();
var mockBusinessEvent = new Mock <IBusinessEvent>();
var streamId = "s";
var position = 5;
var eventType = "x";
var eventData = Encoding.Unicode.GetBytes("data");
var streamEvent = new StreamEvent(streamId, position, null, eventType, eventData);
var causalId = "c";
var cancellationToken = CancellationToken.None;
var state = new TestState(mockEventResolver.Object);
var handlerCalled = false;
var addCausalIdCalled = false;
mockEventResolver.Setup(x => x.CanResolve(eventType)).Returns(true);
mockEventResolver.Setup(x => x.Resolve(eventType, eventData)).Returns(mockBusinessEvent.Object);
mockBusinessEvent.Setup(x => x.GetCausalId()).Returns(causalId);
state.HandlerDelegate = (pStreamId, pPos, pEvent, pToken) =>
{
Assert.Equal(streamId, pStreamId);
Assert.Equal(position, pPos);
Assert.Equal(mockBusinessEvent.Object, pEvent);
Assert.Equal(cancellationToken, pToken);
handlerCalled = true;
return(Task.CompletedTask);
};
state.CausalIdAdderDelegate = (pCausalId) =>
{
Assert.Equal(causalId, pCausalId);
addCausalIdCalled = true;
return(Task.FromResult(true));
};
await state.ApplyStreamEventAsync(streamEvent, CancellationToken.None);
Assert.True(handlerCalled);
Assert.True(addCausalIdCalled); // Added causal id to history?
Assert.Equal(position, state.StreamPositionCheckpoint); // Updated stream checkpoint?
}
public async Task not_apply_stream_event_but_update_stream_position_when_event_type_is_not_resolvable()
{
var mockEventResolver = new Mock <IBusinessEventResolver>();
var called = false;
var state = new TestState(mockEventResolver.Object);
var position = 5;
var eventType = "x";
var streamEvent = new StreamEvent(null, position, null, eventType, null);
mockEventResolver.Setup(x => x.CanResolve(eventType)).Returns(false);
state.HandlerDelegate = (_1, _2, _3, _4) =>
{
called = true;
return(Task.CompletedTask);
};
await state.ApplyStreamEventAsync(streamEvent, CancellationToken.None);
Assert.False(called);
Assert.Equal(position, state.StreamPositionCheckpoint); // Updated stream checkpoint?
}
