Mocking Logger and LoggerFactory with PowerMock and Mockito

Question

I have the following Logger I want to mock out, but to validate log entries are getting called, not for the content.

private static Logger logger = 
        LoggerFactory.getLogger(GoodbyeController.class);

I want to Mock ANY class that is used for LoggerFactory.getLogger() but I could not find out how to do that. This is what I ended up with so far:

@Before
public void performBeforeEachTest() {
    PowerMockito.mockStatic(LoggerFactory.class);
    when(LoggerFactory.getLogger(GoodbyeController.class)).
        thenReturn(loggerMock);

    when(loggerMock.isDebugEnabled()).thenReturn(true);
    doNothing().when(loggerMock).error(any(String.class));

    ...
}

I would like to know:

1. Can I Mock the static LoggerFactory.getLogger() to work for any class?
2. I can only seem to run when(loggerMock.isDebugEnabled()).thenReturn(true); in the @Before and thus I cannot seem to change the characteristics per method. Is there a way around this?

---

Edit findings:

I thought I tried this already and it didnt work:

 when(LoggerFactory.getLogger(any(Class.class))).thenReturn(loggerMock);

But thank you, as it did work.

However I have tried countless variations to:

when(loggerMock.isDebugEnabled()).thenReturn(true);

I cannot get the loggerMock to change its behavior outside of @Before but this only happens with Coburtura. With Clover, the coverage shows 100% but there is still an issue either way.

I have this simple class:

public ExampleService{
    private static final Logger logger =
            LoggerFactory.getLogger(ExampleService.class);

    public String getMessage() {        
    if(logger.isDebugEnabled()){
        logger.debug("isDebugEnabled");
        logger.debug("isDebugEnabled");
    }
    return "Hello world!";
    }
    ...
}

Then I have this test:

@RunWith(PowerMockRunner.class)
@PrepareForTest({LoggerFactory.class})
public class ExampleServiceTests {

    @Mock
    private Logger loggerMock;
    private ExampleServiceservice = new ExampleService();

    @Before
    public void performBeforeEachTest() {
        PowerMockito.mockStatic(LoggerFactory.class);
        when(LoggerFactory.getLogger(any(Class.class))).
            thenReturn(loggerMock);

        //PowerMockito.verifyStatic(); // fails
    }

    @Test
    public void testIsDebugEnabled_True() throws Exception {
        when(loggerMock.isDebugEnabled()).thenReturn(true);
        doNothing().when(loggerMock).debug(any(String.class));

        assertThat(service.getMessage(), is("Hello null: 0"));
        //verify(loggerMock, atLeast(1)).isDebugEnabled(); // fails
    }

    @Test
    public void testIsDebugEnabled_False() throws Exception {
        when(loggerMock.isDebugEnabled()).thenReturn(false);
        doNothing().when(loggerMock).debug(any(String.class));

        assertThat(service.getMessage(), is("Hello null: 0"));
        //verify(loggerMock, atLeast(1)).isDebugEnabled(); // fails
    }
}

In clover I show 100% coverage of the if(logger.isDebugEnabled()){ block. But if I try to verify the loggerMock:

verify(loggerMock, atLeast(1)).isDebugEnabled();

I get zero interactions. I also tried PowerMockito.verifyStatic(); in @Before but that also has zero interactions.

This just seems strange that Cobertura shows the if(logger.isDebugEnabled()){ as being not 100% complete, and Clover does, but both agree the verification fails.