Mocking a Spy method with Mockito

Question

I am writing a unit test for a FizzConfigurator class that looks like:

public class FizzConfigurator {
    public void doFoo(String msg) {
        d         


        

Answer 1

In my case, for the method I was trying to stub, I was passing in incorrect matchers.

My method signature (for the super class method I was trying to stub): String, Object.

I was passing in:

myMethod("string", Mockito.nullable(ClassType.class)) and getting:

Hints: 1. missing thenReturn() 2. you are trying to stub a final method, which is not supported 3: you are stubbing the behaviour of another mock inside before 'thenReturn' instruction if completed

When using a matcher in another parameter, we also need to use one for the string:

myMethod(eq("string"), Mockito.nullable(ClassType.class))

Hope this helps!