def test_dev_by_zero_returns_inf():
c = Calc()
res = c.div(5, 0)
assert res == "inf"
def test_div_two_numbers_float():
c = Calc()
res = c.div(13, 2)
assert res == 6.5
def test_dev_by_zero_returns_inf():
c = Calc()
res = c.div(5, 0)
assert res == "inf"
def test_div_two_numbers_float():
c = Calc()
res = c.div(13, 2)
assert res == 6.5