def test_shou_03(): assert Calc(10, 0).shou() == "Not Devide!"
def test_add_02(): assert Calc(-9, 2).add() == -7
def test_add_01(): assert Calc(9, 2).add() == 11
def test_shou_02(): assert Calc(-9, 2).shou() == -4.5
def test_shou_01(): assert Calc(9, 2).shou() == 4.5
def test_seki_02(): assert Calc(-9, 2).seki() == -18
def test_seki_01(): assert Calc(9, 2).seki() == 18
def test_dif_02(): assert Calc(-9, 2).dif() == -11
def test_dif_01(): assert Calc(9, 2).dif() == 7