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javaeasymockpowermock

Powermock not returning correct object static method

I am using PowerMock to try and mock a final class with static methods, but whenever my code calls MyClass.getInstance() it returns null

In my tests I have annotated the test class

@RunWith(PowerMockRunner.class)
@PrepareForTest(MyClass.class)

In my method to make the mock I do the following

suppressConstructor(MyClass.class);
PowerMock.mockStatic(MyClass.class);
mockClass = PowerMock.createMock(MyClass.class);
expect(MyClass.getInstance()).andReturn(mockClass);

Should PowerMock.createMock create an EasyMock class?

When I call this in my code (MyClass.getInstance()), it always returns null but if I step through the test class the variable mockClass gets instantiated.

Solution

  • It seems like you using the EasyMock way of mocking. Have you replayed the MyClass before calling the getInstance() method, e.g.

    PowerMock.replay(MyClass.class);

    ?

    From the PowerMock MockStatic documentation:

    Use PowerMock.mockStatic(ClassThatContainsStaticMethod.class) to mock all methods of this class. Use PowerMock.replay(ClassThatContainsStaticMethod.class) to change the class to replay mode. Use PowerMock.verify(ClassThatContainsStaticMethod.class) to change the class to verify mode.