def test_given_input_is_not_digit(self):
     statement = FormatValidators.validate_inputisdigit("H")
     self.assertFalse(statement)
 def test_given_input_is_empty_string(self):
     statement = FormatValidators.validate_inputisdigit("")
     self.assertFalse(statement)
 def test_given_input_is_digit(self):
     statement = FormatValidators.validate_inputisdigit("5")
     self.assertEqual("5", statement)