Moq: how do I claim that the methods of my fraudulent object are NOT running?

Question

I have works in which I test that the methods on my mocked object are called with the correct parameters and return the correct result.

Now I want to check another condition. In this case, NO methods must be performed on the mocked object. How can I express this in unit test?

Answer 1

You could create your layout as rigorous. Thus, only those methods that you install are allowed (or Expect, depending on which version of Moq you are playing with).

var foo = new Mock<IFoo>(MockBehavior.Strict); foo.Expect(f => f.Bar()); 

Any time a method is called in foo other than Bar (), an exception will be thrown and your test will fail.

Answer 2

The two easiest ways are to use MockBehaviour.Strict:

 var moqFoo = new Mock<IFoo>(MockBehaviour.Strict); //any calls to methods that there aren't expectations set for will cause exceptions 

or you can always use a callback and throw an exception from it (if there is a special method that should not be called.

 var moqFoo = new Mock<IFoo>(MockBehaviour.Loose); moqFoo.Expect(f => f.Bar()).Callback(throw new ThisShouldNotBeCalledException());