Returning different results or throwing exceptions from successive calls to Moq Mock

Question

I get a Moq object to return different values on successive calls to a method. This is done by this extension method:

public static void ReturnsInOrder<T, TResult>(this ISetup<T, TResult> setup, params TResult[] results) where T : class
{
    setup.Returns(new Queue<TResult>(results).Dequeue);
}

Now I want one of the calls to throw an exception while others return something. Has anyone done this before?

If i do this

mock.Setup(m => m.SomeMethod())
    .Throws(new Exception());
mock.Setup(m => m.SomeMethod())
    .Returns("ok");

then the the first setup is overwritten and only the second setup persists.

Answer 1

Nowadays Moq (version 4+) supports this through its SetupSequence method. See this post for an introduction.