def test_denominators_of_numbers_are_zero_info_message_correct(self):
viewmodel = RationalNumberViewModel()
viewmodel.set_first_number("13/0")
viewmodel.set_second_number("7/0")
self.assertEqual(
"Denominator of first number is zero.Denominator of second number is zero.",
viewmodel.get_info_message())
def test_operation_division_second_numerator_zero_info_message_correct(
self):
viewmodel = RationalNumberViewModel()
viewmodel.set_first_number("12/3")
viewmodel.set_second_number("0/1")
viewmodel.set_operation("/")
self.assertEqual(
"Numerator of second number is zero. Division by zero is not allowed.",
viewmodel.get_info_message())
def test_first_invalid_second_invalid_info_correct(self):
viewmodel = RationalNumberViewModel()
viewmodel.set_first_number("aaa")
viewmodel.set_second_number("bbbb")
self.assertEqual("First number is invalid.Second number is invalid.",
viewmodel.get_info_message())
def test_first_valid_second_empty_info_correct(self):
viewmodel = RationalNumberViewModel()
viewmodel.set_first_number("3/4")
viewmodel.set_second_number("")
self.assertEqual("Second number is empty.",
viewmodel.get_info_message())
def test_first_valid_second_valid_info_empty(self):
viewmodel = RationalNumberViewModel()
viewmodel.set_first_number("12/3")
viewmodel.set_second_number("2/7")
self.assertEqual("", viewmodel.get_info_message())