Modify function to append dummy clear value if not provided

[jamiebenstead]

closes https://github.com/RaspberryPiFoundation/digital-editor-issues/issues/610

Tested using -

_ish.colourRead = lambda: [100, 150, 200, 128]

sh = SenseHat()

# TEST 1: Full colour tuple
rgba = sh.colour.colour
assert isinstance(rgba, tuple), "colour should return a tuple"
assert len(rgba) == 4, "colour should return a 4-tuple (R, G, B, Clear)"
assert rgba == (100, 150, 200, 128), f"Unexpected colour values: {rgba}"

# TEST 2: Individual colour components
assert sh.colour.red == 100, f"Red value incorrect: {sh.colour.red}"
assert sh.colour.green == 150, f"Green value incorrect: {sh.colour.green}"
assert sh.colour.blue == 200, f"Blue value incorrect: {sh.colour.blue}"
assert sh.colour.clear == 128, f"Clear value incorrect: {sh.colour.clear}"

# TEST 3: Aliases
assert sh.colour.color == sh.colour.colour, "color alias not matching colour"
assert sh.colour.color_raw == sh.colour.colour_raw, "color_raw alias not matching colour_raw"

# TEST 4: Raw colour data
raw = sh.colour.colour_raw
assert isinstance(raw, tuple), "colour_raw should return a tuple"
assert raw == (100, 150, 200, 128), f"Unexpected raw values: {raw}"

print("✅ All tests passed successfully!")

[loiswells97]

Looks good 👍