@Test
public void testLoggerAsClassAndLogBackLevelAsNull() {

    Assert.assertNotNull(logbackVerboseConfigurator);
    Assert.assertNotNull(loggerContext);
    try {
        logbackVerboseConfigurator.setLoggerLevel("", null);
        Assert.assertFalse(false);
    }catch(IllegalArgumentException ex) {
        Assert.assertTrue(ex.getMessage().equals("level argument cannot be null"));
    }
}