def test_add(self):
self.assertEqual(Calculator.add(1, 2), 3)
def test_substract(self):
self.assertEqual(Calculator.subtract(3, 2), 1)
def test_multiply(self):
self.assertEqual(Calculator.multiply(3, 2), 6)
def test_substract_():
assert Calculator.subtract(4, 2) == 2
def test_add_():
assert Calculator.add(2, 4) == 6
def test_devide_():
with pytest.raises(ValueError):
Calculator.divide(5, 0)
def test_multiply_():
assert Calculator.multiply(4, 2) == 8