def test_add_hundred_numbers():
c = Calc()
s = range(100)
assert c.add(*s) == 4950
def test_add_two_numbers():
c = Calc()
res = c.add(4, 5)
assert res == 9
def test_add_three_numbers():
c = Calc()
res = c.add(4, 5, 6)
assert res == 15