def test_division_of_2_by_0(self):
first_number = 2
second_number = 0
calculator = Calculator("comum")
self.assertEqual("Error! You can\'t divide a number by zero.",
calculator.divide(first_number, second_number))
def test_power_with_common_calculator(self):
common_calculator = Calculator("Classe ED-205")
first_number = 3
second_number = 3
self.assertEqual("Error! This operation is not available.",
common_calculator.power(first_number, second_number))
def test_division_of_2_by_one_quarter(self):
first_number = 2
second_number = 0.25
calculator = Calculator("comum")
self.assertEqual(8, calculator.divide(first_number, second_number))
def test_multiplication_of_2_times_one_quarter(self):
first_number = 2
second_number = 0.25
calculator = Calculator("comum")
self.assertEqual(0.5, calculator.multiply(first_number, second_number))
def test_multiplication_of_0_times_5(self):
first_number = 0
second_number = 5
calculator = Calculator("comum")
self.assertEqual(0, calculator.multiply(first_number, second_number))
def test_subtraction_of_negative_2_minus_negative_4(self):
first_number = -2
second_number = -4
calculator = Calculator("comum")
self.assertEqual(2, calculator.subtract(first_number, second_number))
def test_subtraction_of_0_minus_1(self):
first_number = 0
second_number = 1
calculator = Calculator("comum")
self.assertEqual(-1, calculator.subtract(first_number, second_number))
def test_sum_of_2_plus_negative_1(self):
first_number = 2
second_number = -1
calculator = Calculator("comum")
self.assertEqual(1, calculator.sum(first_number, second_number))