CODEWITHSUNDEEP
.netunit-testingmockingmoq
toxvaerd
toxvaerd

Reputation: 3812

Mocking the CAL EventAggregator with Moq

I'm using the Composite Application Library's event aggregator, and would like to create a mock for the IEventAggregator interface, for use in my unit test.

I'm planning on using Moq for this task, and an example test so far looks something like this:

var mockEventAggregator = new Mock<IEventAggregator>();
var mockImportantEvent = new Mock<ImportantEvent>();
mockEventAggregator.Setup(e => e.GetEvent<SomeOtherEvent>()).Returns(new Mock<SomeOtherEvent>().Object);
mockEventAggregator.Setup(e => e.GetEvent<SomeThirdEvent>()).Returns(new Mock<SomeThirdEvent>().Object);
// ...
mockEventAggregator.Setup(e => e.GetEvent<ImportantEvent>()).Returns(mockImportantEvent.Object);

mockImportantEvent.Setup(e => e.Publish(It.IsAny<ImportantEventArgs>()));

// ...Actual test...

mockImportantEvent.VerifyAll();

This works fine, but I would like know, if there is some clever way to avoid having to define an empty mock for every event-type my code might encounter (SomeOtherEvent, SomeThirdEvent, ...)? I could of course define all my events this way in a [TestInitialize] method, but I would like to know if there is a more clever way? :-)

Upvotes: 3

Views: 1107

Answers (1)

toxvaerd
toxvaerd

Reputation: 3812

I found the solution for this one:

var mockEventAggregator = new Mock<IEventAggregator>{ DefaultValue = DefaultValue.Mock };

will make the mockEventAggregator return mocks for all nested objects.

Upvotes: 1

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