def test_input_below_range(bright):
request = SetBackLed(bright)
with pytest.raises(ValueError):
request.tobytes()
def test_example_input():
expected = bytearray([0xFF, 0xFF, 0x02, 0x21, 0x00, 0x02, 0x10, 0xCA])
request = SetBackLed(16)
assert request.tobytes() == expected
def test_valid_input(bright):
expected = bytearray([0xFF, 0xFF, 0x02, 0x21, 0x00, 0x02, bright])
expected.append((sum(expected[2:]) & 0xFF) ^ 0xFF)
request = SetBackLed(bright)
assert request.tobytes() == expected