There’s a very nice mocking library for Kotlin – Mockk, which allows you to mock objects, the exact same way you’re desiring. As of its documentation: Objects can be transformed to mocks following way: object MockObj { fun add(a: Int, b: Int) = a + b } mockkObject(MockObj) // aplies mocking to an Object assertEquals(3, … Read more
Mockito comes with a helper class to save you some reflection boiler plate code: import org.mockito.internal.util.reflection.Whitebox; //… @Mock private Person mockedPerson; private Test underTest; // … @Test public void testMethod() { Whitebox.setInternalState(underTest, “person”, mockedPerson); // … } Update: Unfortunately the mockito team decided to remove the class in Mockito 2. So you are back to … Read more