def test_subtraction(self): self.assertTrue(solution(10, 20, "-"), 10)
def test_addition(self): self.assertTrue(solution(10, 20, "+"), 30)
def test_multiplication(self): self.assertTrue(solution(10, 20, "*"), 200)
def test_modulers(self): self.assertTrue(solution(15, 2, "%"), 1)
def test_division(self): self.assertTrue(solution(10, 20, "%"), 2)