'Test that the supportsCheckerFactory method behaves appropriately.'

def test_supportsCheckerFactory(self):

    options = OptionsForUsernamePassword()
    fileCF = cred_file.theFileCheckerFactory
    anonCF = cred_anonymous.theAnonymousCheckerFactory
    self.assertTrue(options.supportsCheckerFactory(fileCF))
    self.assertFalse(options.supportsCheckerFactory(anonCF))
