def test_pump_laws_non_int(self):
p = CentrifPump("", 100, 12, 45, 300)
with pytest.raises(TypeError) as excinfo:
p.speed = "a"
exception_msg = excinfo.value.args[0]
assert exception_msg == "Numeric values only."
def test_pump_laws_neg(self):
p = CentrifPump("", 100, 12, 45, 300)
with pytest.raises(ValueError) as excinfo:
p.speed = -120
exception_msg = excinfo.value.args[0]
assert exception_msg == "Speed must be 0 or greater."