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|
"""
Test the color-format conversion utilities.
"""
# SPDX-License-Identifier: BSD-3-Clause
# pylint: disable=protected-access
import pytest
import webcolors
@pytest.mark.parametrize(
["hex_value", "name"],
[
("#ffffff", "white"),
("#fff", "white"),
("#000080", "navy"),
("#daa520", "goldenrod"),
],
ids=["white-six-digit", "white-three-digit", "navy", "goldenrod"],
)
def test_hex_to_name(hex_value: str, name: str):
"""
Conversion from hex to color name succeeds.
"""
assert name == webcolors.hex_to_name(hex_value)
def test_hex_to_name_unnamed_in_any():
"""
A hex code which does not correspond to a named color raises ValueError.
"""
with pytest.raises(ValueError, match="has no defined color name"):
webcolors.hex_to_name("#123456")
def test_hex_to_name_unnamed_in_spec():
"""
A hex code which does not correspond to a named color in the given specification
raises ValueError.
"""
# This is 'goldenrod' in CSS 3 list, unnamed in HTML 4.
with pytest.raises(ValueError, match="has no defined color name"):
webcolors.hex_to_name("#daa520", spec=webcolors.HTML4)
@pytest.mark.parametrize("spec", webcolors._definitions._SUPPORTED_SPECIFICATIONS)
def test_hex_to_name_supported_spec(spec: str):
"""
Explicitly using one of the supported specifications succeeds.
"""
assert "white" == webcolors.hex_to_name("#ffffff", spec=spec)
@pytest.mark.parametrize("spec", ["css1", "css4", "html5"])
def test_hex_to_name_unspported_spec(spec: str):
"""
Using an unsupported specification raises ValueError.
"""
with pytest.raises(ValueError, match="not a supported specification"):
webcolors.hex_to_name("#ffffff", spec=spec)
@pytest.mark.parametrize(
["hex_value", "triplet"],
[("#fff", (255, 255, 255)), ("#ffffff", (255, 255, 255)), ("#000080", (0, 0, 128))],
ids=["white-three-digit", "white-six-digit", "navy"],
)
def test_hex_to_rgb(hex_value: str, triplet: webcolors.IntTuple):
"""
Conversion from hex to integer RGB triplet succeeds.
"""
result = webcolors.hex_to_rgb(hex_value)
assert isinstance(result, webcolors.IntegerRGB)
assert triplet == result
@pytest.mark.parametrize(
["hex_value", "triplet"],
[
("#fff", ("100%", "100%", "100%")),
("#ffffff", ("100%", "100%", "100%")),
("#000080", ("0%", "0%", "50%")),
],
ids=["white-three-digit", "white-six-digit", "navy"],
)
def test_hex_to_rgb_percent(hex_value: str, triplet: webcolors.PercentTuple):
"""
Conversion from hex to percent RGB triplet succeeds.
"""
result = webcolors.hex_to_rgb_percent(hex_value)
assert isinstance(result, webcolors.PercentRGB)
assert triplet == result
@pytest.mark.parametrize(
["triplet", "name"],
[
((255, 255, 255), "white"),
((0, 0, 128), "navy"),
((218, 165, 32), "goldenrod"),
(webcolors.IntegerRGB(218, 165, 32), "goldenrod"),
],
ids=["white", "navy", "goldenrod", "goldenrod-integerrgb"],
)
def test_rgb_to_name(triplet: webcolors.IntTuple, name: str):
"""
Conversion from integer RGB triplet to color name succeeds.
"""
assert name == webcolors.rgb_to_name(triplet)
def test_rgb_to_name_unnamed_in_any():
"""
An integer RGB triplet which does not correspond to a named color raises ValueError.
"""
with pytest.raises(ValueError, match="has no defined color name"):
webcolors.rgb_to_name((18, 52, 86))
def test_rgb_to_name_unnamed_in_spec():
"""
An integer RGB triplet which does not correspond to a named color in the given
specification raises ValueError.
"""
# This is 'goldenrod' in CSS 3 list, unnamed in HTML 4.
with pytest.raises(ValueError, match="has no defined color name"):
webcolors.rgb_to_name((218, 165, 32), spec=webcolors.HTML4)
@pytest.mark.parametrize("spec", webcolors._definitions._SUPPORTED_SPECIFICATIONS)
def test_rgb_to_name_supported_spec(spec: str):
"""
Using one of the supported specifications succeeds.
"""
assert "white" == webcolors.rgb_to_name((255, 255, 255), spec=spec)
@pytest.mark.parametrize("spec", ["css1", "css4", "html5"])
def test_rgb_to_name_unsupported_spec(spec: str):
"""
Using an unsupported specification raises ValueError.
"""
with pytest.raises(ValueError, match="not a supported specification"):
webcolors.rgb_to_name((255, 255, 255), spec=spec)
@pytest.mark.parametrize(
["triplet", "hex_value"],
[
((255, 255, 255), "#ffffff"),
((0, 0, 128), "#000080"),
((218, 165, 32), "#daa520"),
],
ids=["white", "navy", "goldenrod"],
)
def test_rgb_to_hex(triplet: webcolors.IntTuple, hex_value: str):
"""
Conversion from integer RGB triplet to hex succeeds.
"""
assert hex_value == webcolors.rgb_to_hex(triplet)
@pytest.mark.parametrize(
["triplet", "percent_triplet"],
[
((255, 255, 255), ("100%", "100%", "100%")),
((0, 0, 128), ("0%", "0%", "50%")),
((218, 165, 32), ("85.49%", "64.71%", "12.5%")),
],
ids=["white", "navy", "goldenrod"],
)
def test_rgb_to_rgb_percent(
triplet: webcolors.IntTuple, percent_triplet: webcolors.PercentTuple
):
"""
Conversion from integer RGB triplet to percent RGB triplet succeeds.
"""
result = webcolors.rgb_to_rgb_percent(triplet)
assert isinstance(result, webcolors.PercentRGB)
assert percent_triplet == result
@pytest.mark.parametrize(
["name", "hex_value"],
[("white", "#ffffff"), ("navy", "#000080"), ("goldenrod", "#daa520")],
ids=["white", "navy", "goldenrod"],
)
def test_name_to_hex(name: str, hex_value: str):
"""
Test correct conversion of color names to hex.
"""
assert hex_value == webcolors.name_to_hex(name)
@pytest.mark.parametrize(
["name", "spec"], [("goldenrod", "html4"), ("glue", "css21"), ("breen", "css3")]
)
def test_name_to_hex_unnamed(name: str, spec: str):
"""
A name which does not correspond to a color, or does not correspond to a
color in the given specification, raises ValueError.
"""
with pytest.raises(ValueError, match="is not defined as a named color"):
webcolors.name_to_hex(name, spec=spec)
@pytest.mark.parametrize("spec", webcolors._definitions._SUPPORTED_SPECIFICATIONS)
def test_name_to_hex_supported_spec(spec: str):
"""
Using one of the supported specifications succeeds.
"""
assert "#ffffff" == webcolors.name_to_hex("white", spec=spec)
@pytest.mark.parametrize("spec", ["css1", "css4", "html5"])
def test_name_to_hex_usupported_spec(spec: str):
"""
Using an unsupported specification raises ValueError.
"""
with pytest.raises(ValueError, match="not a supported specification"):
webcolors.name_to_hex("white", spec=spec)
@pytest.mark.parametrize(
["name", "triplet"],
[("white", (255, 255, 255)), ("navy", (0, 0, 128)), ("goldenrod", (218, 165, 32))],
ids=["white", "navy", "goldenrod"],
)
def test_name_to_rgb(name: str, triplet: webcolors.IntTuple):
"""
Conversion from color name to integer RGB triplet succeeds.
"""
result = webcolors.name_to_rgb(name)
assert isinstance(result, webcolors.IntegerRGB)
assert triplet == result
@pytest.mark.parametrize(
["name", "triplet"],
[
("white", ("100%", "100%", "100%")),
("navy", ("0%", "0%", "50%")),
("goldenrod", ("85.49%", "64.71%", "12.5%")),
],
ids=["white", "navy", "goldenrod"],
)
def test_name_to_rgb_percent(name: str, triplet: webcolors.PercentTuple):
"""
Conversion from color name to percent RGB triplet succeeds.
"""
result = webcolors.name_to_rgb_percent(name)
assert isinstance(result, webcolors.PercentRGB)
assert triplet == result
@pytest.mark.parametrize(
["triplet", "name"],
[
(("100%", "100%", "100%"), "white"),
(("0%", "0%", "50%"), "navy"),
(("85.49%", "64.71%", "12.5%"), "goldenrod"),
(webcolors.PercentRGB("85.49%", "64.71%", "12.5%"), "goldenrod"),
],
ids=["white", "navy", "goldenrod", "goldenrod-percentrgb"],
)
def test_rgb_percent_to_name(triplet: webcolors.PercentTuple, name: str):
"""
Conversion from percent RGB triplet to color name succeeds.
"""
assert name == webcolors.rgb_percent_to_name(triplet)
def test_rgb_percent_to_name_unnamed_in_any():
"""
A percent RGB triplet which does not correspond to a named color raises ValueError.
"""
with pytest.raises(ValueError, match="has no defined color name"):
webcolors.rgb_percent_to_name(("7.06%", "20.39%", "33.73%"))
def test_rgb_percent_to_name_unnamed_in_spec():
"""
A percent RGB triplet which does not correspond to a named color in the given
specification raises ValueError.
"""
# This is 'goldenrod' in CSS 3 list, unnamed in HTML 4.
with pytest.raises(ValueError, match="has no defined color name"):
webcolors.rgb_percent_to_name(
("85.49%", "64.71%", "12.5%"), spec=webcolors.HTML4
)
@pytest.mark.parametrize("spec", webcolors._definitions._SUPPORTED_SPECIFICATIONS)
def test_rgb_percent_to_name_supported_spec(spec: str):
"""
Using one of the supported specifications succeeds.
"""
assert "white" == webcolors.rgb_percent_to_name(("100%", "100%", "100%"), spec=spec)
@pytest.mark.parametrize("spec", ["css1", "css4", "html5"])
def test_rgb_percent_to_name_unsupported_spec(spec: str):
"""
Using an unsupported specification raises ValueError.
"""
with pytest.raises(ValueError, match="not a supported specification"):
webcolors.rgb_percent_to_name(("100%", "100%", "100%"), spec=spec)
@pytest.mark.parametrize(
["triplet", "hex_value"],
[
(("100%", "100%", "0%"), "#ffff00"),
(("0%", "0%", "50%"), "#000080"),
(("85.49%", "64.71%", "12.5%"), "#daa520"),
],
ids=["white", "navy", "goldenrod"],
)
def test_rgb_percent_to_hex(triplet: webcolors.PercentTuple, hex_value: str):
"""
Conversion from percent RGB triplet to hex succeeds.
"""
assert hex_value == webcolors.rgb_percent_to_hex(triplet)
@pytest.mark.parametrize(
["triplet", "int_triplet"],
[
(("100%", "100%", "0%"), (255, 255, 0)),
(("0%", "0%", "50%"), (0, 0, 128)),
(("85.49%", "64.71%", "12.5%"), (218, 165, 32)),
],
)
def test_rgb_percent_to_rgb(
triplet: webcolors.PercentTuple, int_triplet: webcolors.IntTuple
):
"""
Conversion from percent RGB triplet to integer RGB triplet succeeds.
"""
result = webcolors.rgb_percent_to_rgb(triplet)
assert isinstance(result, webcolors.IntegerRGB)
assert int_triplet == result
@pytest.mark.parametrize(
["value", "name"],
[
("#a9a9a9", "darkgray"),
("#2f4f4f", "darkslategray"),
("#696969", "dimgray"),
("#808080", "gray"),
("#d3d3d3", "lightgray"),
("#778899", "lightslategray"),
("#708090", "slategray"),
],
ids=[
"darkgray",
"darkslategray",
"dimgray",
"gray",
"lightgray",
"lightslategray",
"slategray",
],
)
def test_spelling_variants_hex(value: str, name: str):
"""
When asked to name a hex color value that maps to either of 'gray' or 'grey' in
CSS3, or a related color like 'darkgray'/'darkgrey', webcolors always picks
'gray' as the spelling.
"""
assert name == webcolors.hex_to_name(value, spec=webcolors.CSS3)
@pytest.mark.parametrize(
["value", "name"],
[
((169, 169, 169), "darkgray"),
((47, 79, 79), "darkslategray"),
((105, 105, 105), "dimgray"),
((128, 128, 128), "gray"),
((211, 211, 211), "lightgray"),
((119, 136, 153), "lightslategray"),
((112, 128, 144), "slategray"),
],
ids=[
"darkgray",
"darkslategray",
"dimgray",
"gray",
"lightgray",
"lightslategray",
"slategray",
],
)
def test_spelling_variants_int(value: webcolors.IntTuple, name: str):
"""
When asked to name an integer RGB color value that maps to either of 'gray' or
'grey' in CSS3, or a related color like 'darkgray'/'darkgrey', webcolors always
picks 'gray' as the spelling.
"""
assert name == webcolors.rgb_to_name(value, spec=webcolors.CSS3)
@pytest.mark.parametrize(
["value", "name"],
[
(("66.27%", "66.27%", "66.27%"), "darkgray"),
(("18.43%", "30.98%", "30.98%"), "darkslategray"),
(("41.18%", "41.18%", "41.18%"), "dimgray"),
(("50%", "50%", "50%"), "gray"),
(("82.75%", "82.75%", "82.75%"), "lightgray"),
(("46.67%", "53.33%", "60.00%"), "lightslategray"),
(("43.92%", "50%", "56.47%"), "slategray"),
],
ids=[
"darkgray",
"darkslategray",
"dimgray",
"gray",
"lightgray",
"lightslategray",
"slategray",
],
)
def test_spelling_variants_percent(value: webcolors.PercentTuple, name: str):
"""
When asked to name a percent RGB color value that maps to either of 'gray' or 'grey'
in CSS3, or a related color like 'darkgray'/'darkgrey', webcolors always picks
'gray' as the spelling.
"""
assert name == webcolors.rgb_percent_to_name(value, spec=webcolors.CSS3)
@pytest.mark.parametrize(
["spec", "mapping"],
[
(webcolors.HTML4, webcolors._definitions._HTML4_NAMES_TO_HEX),
(webcolors.CSS2, webcolors._definitions._CSS2_NAMES_TO_HEX),
(webcolors.CSS21, webcolors._definitions._CSS21_NAMES_TO_HEX),
(webcolors.CSS3, webcolors._definitions._CSS3_NAMES_TO_HEX),
],
ids=["html4", "css2", "css21", "css3"],
)
def test_names_valid(spec: str, mapping: dict):
"""
names() correctly returns the set of names for a given spec.
"""
assert webcolors.names(spec) == list(sorted(mapping.keys()))
@pytest.mark.parametrize("spec", ["CSS0", "HTML12", "random"])
def test_names_invalid(spec: str):
"""
names() raises ValueError when asked for an unsupported spec.
"""
with pytest.raises(ValueError, match="not a supported specification"):
webcolors.names(spec)
|
