Using Moq to determine if a method is called

Question

It is my understanding that I can test that a method call will occur if I call a higher level method, i.e.:

public abstract class SomeClass()
{    
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Answer 1

Even though I agree that the @Paul's answer is the recommended way to go I just want to add one alternative way which is provided by moq off the self.

Since SomeClass is abstract it is indeed mockable, but public void SomeMehod() isn't. The point is to find the way to mock and somehow invoke that method and then using CallBase propagate the call to the SomeOtherMethod(). It might sound as a hack but it is simple in essence. It could be used in the case if the proposed refactoring is not possible.

// This class is used only for test and purpose is make SomeMethod mockable
public abstract class DummyClass : SomeClass
{
    public virtual void DummyMethod() => base.SomeMethod();
}

Then you could setup DummyMethod() to propagate the call by setting CallBase flag.

//Arrange
var mock = new Mock();
mock.Setup(m => m.DummyMethod()).CallBase();

//Act
mock.Object.SomeMethod();

//Assert
mock.Verify(m => m.SomeOtherMethod(), Times.Once);