类中的Mockito和final equals（）方法-是否可模拟？

Question

I want to mock a class from other library using Mockito. I read that Mockito relies on specific (CGLIB provided I think) implementation of equals method. Unfortunately this outer class has equals() denoted with final modifier, and there is throwing exception in its body.

When I try to mock this class I always get exception from this method. CGLIB apparently doesn't get by with final, and real method is called.

Any ideas? What can I do, to mock this class using Mockito? Maybe other library will handle it?

[EDIT] quick explanation: I don't want to mock equals(), I check other methods. Problem is that mockito internally uses equals(), I don't know what for. As equals() is final, real method is called with exception throwing. I had hope that there is some setting in mockito "don't use equals()" :-) Thanks for answers, I will read them closely tomorrow.

Answer 1

This matrix shows features supported by different frameworks:

External link to the matrix here .

According to this, only PowerMock and JMockit can mock final methods.

Answer 2

Mockito cannot mock final methods. Apparently PowerMock can though.

A hacky workaround could be to create a non-final method that delegates to the final equals method and mock that.

Answer 3

I believe that the steps to mock a final method with PowerMock and Mockito API would be: run your tests with the @RunWith(PowerMockRunner.class) then prepare the class you want to mock @PrepareForTest(ClassToBeMocked.class) . After that, mock your object and use the when method to mock the equals method.

I think that it won't work if you do not use the PrepareForTest annotation in your test class.