public void Load_WhenAnAggregatorLoadsEventsFromHistory_ThenTheAggregatorShouldUpdateWithTheDetailsOfTheEvents
(
Guid id,
string mockProperty,
MockAggregator mockAggregator,
IEvent mockEvent
)
{
"Given an aggregate"
.x(() => mockAggregator = _fixture.Create <MockAggregator>());
"And an aggregate Id"
.x(() => id = _fixture.Create <Guid>());
"And an event loaded from the event store"
.x(() =>
{
mockProperty = _fixture.Create <string>();
mockEvent = new MockPropertyChangedEvent(id, mockProperty);
});
"And the event has the correct version"
.x(() => mockEvent.Version = 1);
"When the aggregator loads the event"
.x(() => mockAggregator.Load(new[] { mockEvent }));
"Then the aggregator is updated with the details of the event"
.x(() =>
{
mockAggregator.Id.Should().Be(id);
mockAggregator.MockProperty.Should().Be(mockProperty);
mockAggregator.Version.Should().Be(mockEvent.Version);
});
}
public void RaiseEvent_WhenAPropertyIsChangedInAnAggregator_ThenAnEventShouldBeRaisedAndTheChangeShouldBeAppliedToTheAggregator
(
Guid id,
string mockProperty,
MockAggregator mockAggregator
)
{
"Given an existing aggregator"
.x(() =>
{
id = _fixture.Create <Guid>();
mockAggregator = new MockAggregator(id);
});
"When a property is changed in the aggregator"
.x(() => mockAggregator.ChangeMockProperty(mockProperty));
"Then the aggregator is updated with the details of the property"
.x(() =>
{
mockAggregator.MockProperty.Should().Be(mockProperty);
mockAggregator.FlushPendingEvents().FirstOrDefault().Should().BeOfType <MockPropertyChangedEvent>();
mockAggregator.Version.Should().Be(1);
});
}
public void Load_WhenAnAggregatorHasAnEventThatIsOutOfOrder_ThenAnExceptionShouldBeThrown
(
Guid id,
IAggregateRoot mockAggregator,
IEvent mockEvent,
Action action
)
{
"Given an existing aggregator"
.x(() =>
{
id = _fixture.Create <Guid>();
mockAggregator = new MockAggregator(id);
});
"And an existing event"
.x(() => { mockEvent = _fixture.Create <MockPropertyChangedEvent>(); });
"And the event has an incorrect version"
.x(() => mockEvent.Version = 100);
"When the aggregator loads the event"
.x(() => { action = () => mockAggregator.Load(new List <IEvent> {
mockEvent
}); });
"Then an error is thrown indicating the event is out of order"
.x(() => action.Should().Throw <AggregateEventOutOfOrderException>());
}
public void CheckRule_WhenAggregateAndAndInvalidRule_ThenShouldThrowError
(
MockAggregator mockAggregator,
Action action
)
{
"Give an aggregate with no id"
.x(() => mockAggregator = new MockAggregator());
"When a rule is validated"
.x(() => action = () => mockAggregator.CheckBusinessRule(false));
"Then an exception is thrown"
.x(() => action.Should().Throw <RuleValidationException>());
}
public void CheckRule_WhenAggregateAndAndValidRule_ThenShouldNotThrowError
(
MockAggregator mockAggregator,
Action action
)
{
"Give an aggregate with no id"
.x(() => mockAggregator = new MockAggregator());
"When a rule is validated"
.x(() => action = () => mockAggregator.CheckBusinessRule(true));
"Then an exception is not thrown"
.x(() => action.Should().NotThrow());
}
public void Fetch_WhenTheEventsFromTheEventStoreAreFetchedAndLoadedToTheAggregator_ThenTheAggregatorShouldBeReturnedWithTheEventsLoaded()
{
Guid id = _fixture.Create <Guid>();
string mockProperty = _fixture.Create <string>();
IEvent e = new MockPropertyChangedEvent(id, mockProperty)
{
Version = 1
};
_mockEventStore.Setup(call => call.Fetch(id)).Returns(Task.FromResult <IEnumerable <IEvent> >(new[] { e }));
MockAggregator actualAggregator = _repository.FetchAsync(id).Result;
actualAggregator.Id.Should().Be(id);
actualAggregator.MockProperty.Should().Be(mockProperty);
actualAggregator.Version.Should().Be(e.Version);
}
public void FlushPendingEvents_WhenAggregateAndEventHaveNoAggregateId_ThenAnErrorShouldBeThrown
(
MockAggregator mockAggregator,
Action action
)
{
"Give an aggregate with no id"
.x(() => mockAggregator = new MockAggregator());
"And a property is changed in the aggregator"
.x(() => mockAggregator.ChangeMockProperty(null));
"When the request to flush pending events is called"
.x(() => action = () => mockAggregator.FlushPendingEvents());
"Then an exception is thrown"
.x(() => action.Should().Throw <AggregateEventMissingIdException>());
}
public void FlushPendingEvents_WhenThePendingEventsAreFlushed_ThenTheAggregatorShouldHaveAnUpdatedVersion
(
Guid id,
string mockProperty,
MockAggregator mockAggregator,
IEvent mockEvent
)
{
"Given an aggregator"
.x(() =>
{
id = _fixture.Create <Guid>();
mockAggregator = new MockAggregator(id);
});
"And a property value"
.x(() => { mockProperty = _fixture.Create <string>(); });
"And the property is applied to the aggregator"
.x(() => { mockAggregator.ChangeMockProperty(mockProperty); });
"When the pending events are flushed"
.x(() => mockEvent = mockAggregator.FlushPendingEvents().First());
"Then the aggregator version is updated"
.x(() => mockAggregator.Version.Should().Be(mockEvent.Version));
"And the command is applied to the aggregator"
.x(() => mockAggregator.MockProperty.Should().Be(mockProperty));
"And the event id is the same as the aggregator id"
.x(() => mockEvent.Id.Should().Be(id));
"And the event timestamp is set"
.x(() => mockEvent.TimeStamp.Date.Should().Be(DateTimeOffset.UtcNow.Date));
}