Using Moq to Mock a Func<> constructor parameter and Verify it was called twice

Question

Taken the question from this article (How to moq a Func) and adapted it as the answer is not correct.

public class FooBar
{
    private Func

        

Answer 1

Since Moq v4.1.1308.2120

As of this version, which was released some months after this question was asked (Aug 21, 2013), the functionality to mock a Func<> has been added. So with any current version of mock, you can use var funcMock = new Mock>();.

Original (outdated) answer

If you have a lot of callback Func's, Actions, etc, it's better to define a helper interface in your tests and mock that interface. This way you can use the regular Moq functionality, like setting up return values, testing input arguments, etc.

interface IFooBarTestMethods
{
    IFooBarProxy FooBarProxyFactory();
}

Usage

var testMethodsMock = new Mock();
testMethodsMock
    .Setup(x => x.FooBarProxyFactory())
    .Returns(new Mock());

var sut = new FooBar(testMethodsMock.Object.FooBarProxyFactory);
testMethodsMock.Verify(x => x.FooBarProxyFactory(), Times.Exactly(2));