def test_multiply_positive_and_negative_returns_negative(self):
calc = Calculator()
res = calc.multi(15, -3)
self.assertEqual(-45, res)
def test_multiply_any_number_and_zero_returns_zero(self):
calc = Calculator()
res = calc.multi(15, 0)
self.assertEqual(0, res)
def test_multiply_two_positive_numbers_returns_positive(self):
calc = Calculator()
res = calc.multi(8, 3)
self.assertEqual(24, res)