How do I mock a class without an interface?

c# mocking tdd
Vinicius Seganfredo picture Vinicius Seganfredo · Dec 5, 2013 · Viewed 96.3k times · Source

I am working on .NET 4.0 using C# in Windows 7.

I want to test the communication between some methods using mock. The only problem is that I want to do it without implementing an interface. Is that possible?

I just read a lot of topics and some tutorials about mock objects, but all of them used to mock interfaces, and not the classes. I tried to use Rhino and Moq frameworks.

Answer

Justin Pihony picture Justin Pihony · Dec 5, 2013

Simply mark any method you need to fake as virtual (and not private). Then you will be able to create a fake that can override the method.

If you use new Mock<Type> and you don't have a parameterless constructor then you can pass the parameters as the arguments of the above call as it takes a type of param Objects

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