def test_div_by_0_returns_inf():
c = Calc()
res = c.div(20, 0)
assert res == 'inf'
def test_div_two_numbers_float():
c = Calc()
res = c.div(13, 2)
assert res == 6.5
def test_div_by_0_returns_inf():
c = Calc()
res = c.div(20, 0)
assert res == 'inf'
def test_div_two_numbers_float():
c = Calc()
res = c.div(13, 2)
assert res == 6.5