PowerMockito verify a arbitrary number param constructor call

Question

I want to check that a specific constructor is called with a certain set of params and to check that the params are correct.

The class uses the arbitrary parameters of java ( ... ) like this:

public class MyClass{
    public MyClass(Object o, int... params){
        //DOSOMETHING   
    }
}

The class under test has a method that do this:

@RunWith(PowerMockRunner.class) @PrepareForTest(MyClass.class)
public class ClassUnderTest {
    private int[] par;
    public ClassUnderTest(int... params){
        this.par = params;
    }

    public MyClass methodToTest(){
        return new MyClass(null, this.par);
    }
}

I want to check that the returned MyClass was actually called with the correct agruments.

What I did is this:

whenNew(MyClass.class).withAnyArguments().thenReturn(null);

ClassUnderTest clazz = new ClassUnderTest(0, 1, 2);
MyClass res = clazz.methodToTest();
verifyNew(MyClass.class).withArguments(eq(null), any(int[].class));

But is not working with this error:

java.lang.AssertionError: Wanted but not invoked my.package.MyClass(
    null,
    <any>
);
Actually, there were zero interactions with this mock.

Do you have any suggestion or Idea how to test this, I would like to avoid using getters of MyClass.....

Answer 1

I solved the problem just PreparingForTest the class that I was testing so I did:

@PrepareForTest(ClassUnderTest.class)

instead of

@PrepareForTest(MyClass.class)

Monday if I'll have some spare time I will post a more detailed answer