@Override
    public boolean isWarnEnabled() {
        return logger.isWarnEnabled();
    }
@Test
    public void testIsWarnEnabled() {
        Log mockLog = mock(Log.class);

        when(mockLog.isWarnEnabled()).thenReturn(true);

        InternalLogger logger = new CommonsLogger(mockLog, "foo");
        assertTrue(logger.isWarnEnabled());

        verify(mockLog).isWarnEnabled();
    }