def test_operation_division_second_numerator_zero_calculate_button_disabled(
self):
viewmodel = RationalNumberViewModel()
viewmodel.set_first_number("12/3")
viewmodel.set_second_number("0/1")
viewmodel.set_operation("/")
self.assertEqual("disabled", viewmodel.get_calculate_button_state())
def test_calculate_button_disabled_by_default(self):
viewmodel = RationalNumberViewModel()
self.assertEqual("disabled", viewmodel.get_calculate_button_state())
def test_operation_invalid_calculate_button_disabled(self):
viewmodel = RationalNumberViewModel()
viewmodel.set_operation("%")
self.assertEqual("disabled", viewmodel.get_calculate_button_state())
def test_numbers_invalid_calculate_button_disabled(self):
viewmodel = RationalNumberViewModel()
viewmodel.set_first_number("a")
viewmodel.set_second_number("2/7")
self.assertEqual("disabled", viewmodel.get_calculate_button_state())
def test_numbers_filled_calculate_button_enabled(self):
viewmodel = RationalNumberViewModel()
viewmodel.set_first_number("1/2")
viewmodel.set_second_number("2/7")
self.assertEqual("normal", viewmodel.get_calculate_button_state())
def test_denominator_of_number_zero_calculate_button_disabled(self):
viewmodel = RationalNumberViewModel()
viewmodel.set_first_number("12/0")
viewmodel.set_second_number("2/7")
viewmodel.set_operation("+")
self.assertEqual("disabled", viewmodel.get_calculate_button_state())