Mocking internal interfaces with NMock2

July 7th, 2007

Yesterday I stumbled into a question of how to mock an internal interface.

The interface is visible in the test assembly due to InternalVisibleTo attribute, but Mockery was unable to create a mock of it.
The very first idea was additional InternalVisibleTo, but I had to find out what assembly name to use.

Since dynamic mocks are actual classes created on-demand for the specified interface, they do not belong to NMock2 assembly.
But they have their own dynamic assembly with consistent name — in case of NMock2 it is “Mocks” (I got it from Reflector).
So I used InternalVisibleTo(”Mocks”) and it actually worked.

I am not sure if it would work with strong names, but, fortunately, I do not need to strong name this project.