Mock Class.class in Java JUnit 5

Question

I am trying to test a overridden method that takes in a parameter of type Class<? extends HttpMessageConverter<?>>Class<? extends HttpMessageConverter<?>> as an input. As this parameter is not being used in my implementation, I want to mock it (or in worst case I can go ahead with actual initialization of the instance).

@Mock
Class<? extends HttpMessageConverter<?>> selectedConverterType;  

This is how I am mocking it (although I have tried using Mockito.mock() , but even that did not work)

@Override
    public Object beforeBodyWrite(Object body, MethodParameter returnType, MediaType selectedContentType,
            Class<? extends HttpMessageConverter<?>> selectedConverterType, ServerHttpRequest request,
            ServerHttpResponse response) {.....}

This is the method I am trying to test.

Some observation:
It fails when MockCreationValidator try to validate the type of mock in MockSettingsImpl . This happens only for Class type, other objects are being mocked as expected.

Answer 1

As the concerned instance is not being used in implementation, passing it as null did the job for me. It is not a good idea to do so, but I am running out of time and I want to reach code coverage limit.