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"""
Test the color-value normalization functions.
"""
# SPDX-License-Identifier: BSD-3-Clause
import pytest
import webcolors
@pytest.mark.parametrize(
["raw", "normalized"],
[
("#0099cc", "#0099cc"),
("#0099CC", "#0099cc"),
("#09c", "#0099cc"),
("#09C", "#0099cc"),
],
ids=["lowercase", "uppercase", "three-digit-lowercase", "three-digit-uppercase"],
)
def test_normalize_hex(raw: str, normalized: str):
"""
Hexadecimal normalization normalizes valid hex color codes to 6 digits,
lowercase.
"""
assert normalized == webcolors.normalize_hex(raw)
@pytest.mark.parametrize(
"hex_value",
["0099cc", "#0000gg", "#0000", "#00000000"],
ids=["no-hash", "not-hex", "too-short", "too-long"],
)
def test_normalize_hex_format(hex_value: str):
"""
Hex normalization raises ValueError on invalid hex color code.
"""
with pytest.raises(ValueError, match="not a valid hexadecimal color value"):
webcolors.normalize_hex(hex_value)
@pytest.mark.parametrize(
["raw", "normalized"],
[(255, 255), (0, 0), (128, 128), (-20, 0), (270, 255), (-0, 0)],
ids=["max", "min", "middle", "clipped-to-min", "clipped-to-max", "negative-zero"],
)
def test_normalize_integer_rgb(raw: int, normalized: int):
"""
Integer normalization clips to 0-255.
"""
# pylint: disable=protected-access
assert normalized == webcolors._normalization._normalize_integer_rgb(raw)
@pytest.mark.parametrize(
["triplet", "normalized"],
[
((128, 128, 128), (128, 128, 128)),
((0, 0, 0), (0, 0, 0)),
((255, 255, 255), (255, 255, 255)),
((270, -20, 128), (255, 0, 128)),
((-0, -0, -0), (0, 0, 0)),
],
ids=["navy", "black", "white", "clipped", "negative-zero"],
)
def test_normalize_integer_triplet(
triplet: webcolors.IntTuple, normalized: webcolors.IntTuple
):
"""
Integer triplet normalization clips all values to 0-255.
"""
result = webcolors.normalize_integer_triplet(triplet)
assert isinstance(result, webcolors.IntegerRGB)
assert normalized == result
@pytest.mark.parametrize(
["raw", "normalized"],
[
("0%", "0%"),
("100%", "100%"),
("62%", "62%"),
("-5%", "0%"),
("250%", "100%"),
("85.49%", "85.49%"),
("-0%", "0%"),
],
ids=[
"min",
"max",
"not-special",
"clipped-to-min",
"clipped-to-max",
"floating-point",
"negative-zero",
],
)
def test_normalize_percent_rgb(raw: str, normalized: str):
"""
Percent normalization clips to 0%-100%.
"""
# pylint: disable=protected-access
assert normalized == webcolors._normalization._normalize_percent_rgb(raw)
@pytest.mark.parametrize(
["triplet", "normalized"],
[
(("50%", "50%", "50%"), ("50%", "50%", "50%")),
(("0%", "100%", "0%"), ("0%", "100%", "0%")),
(("-10%", "250%", "500%"), ("0%", "100%", "100%")),
(("-0%", "-0%", "-0%"), ("0%", "0%", "0%")),
],
ids=["gray", "green", "clipped", "negative-zero"],
)
def test_normalize_percent_triplet(
triplet: webcolors.PercentTuple, normalized: webcolors.PercentTuple
):
"""
Percent triplet normalization clips all values to 0%-100%.
"""
result = webcolors.normalize_percent_triplet(triplet)
assert isinstance(result, webcolors.PercentRGB)
assert normalized == result
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