Mockito / Powermockito mock private void method

Question

I need to mock a private void method which takes no arguments using mockito and powermock.

The method belongs to a instance which is a spy.

I am aware the fact I need to do this suggests bad code but I am working with an old project converting the unit tests from one testing framework to another.

If anyone has any suggestions it would be much appreciated.

Thank You!

So far I have tried this:

PowerMockito.doNothing().when(Whitebox.invokeMethod(spy,"method",null));

But I get this error:

No method found with name 'method' with parameter types: [ <none> ] 

Answer 1

I haven't tried Whitebox (which comes with Powermock), but try something like:

@RunWith(PowerMockRunner.class)
@PrepareForTest(MyClass.class)
public class MyClassTest {
    private MyClass myClass;

    @Before
    public void setup() {
        myClass = PowerMockito.spy(new MyClass());
        PowerMockito.doNothing().when(myClass, "myPrivateMethod");
    }
    //Tests..
}

.. as far as I can remember..