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"""
Test the color-format conversion utilities.
"""
import unittest
import webcolors
class HexConversionTests(unittest.TestCase):
"""
Test the functions which convert from hex color codes to other
formats.
"""
def test_hex_to_name(self):
"""
Test conversion from hex to color name.
"""
test_pairs = (
("#ffffff", "white"),
("#fff", "white"),
("#000080", "navy"),
("#daa520", "goldenrod"),
)
for hex_value, name in test_pairs:
assert name == webcolors.hex_to_name(hex_value)
def test_hex_to_name_unnamed(self):
"""
A hex code which does not correspond to a named color, or does
not correspond to a named color in the given specification,
raises ValueError.
"""
# No name in any spec.
self.assertRaises(ValueError, webcolors.hex_to_name, "#123456")
# This is 'goldenrod' in CSS 3 list, unnamed in HTML 4.
self.assertRaises(
ValueError, webcolors.hex_to_name, "#daa520", spec=webcolors.HTML4
)
def test_hex_to_name_specs(self):
"""
Using one of the supported specifications succeeds; using an
unsupported specification raises ValueError.
"""
for supported_spec in webcolors.constants.SUPPORTED_SPECIFICATIONS:
result = webcolors.hex_to_name("#ffffff", spec=supported_spec)
assert "white" == result
for unsupported_spec in ("css1", "css4", "html5"):
self.assertRaises(
ValueError, webcolors.hex_to_name, "#ffffff", spec=unsupported_spec
)
def test_hex_to_rgb(self):
"""
Test conversion from hex to integer RGB triplet.
"""
test_pairs = (
("#fff", (255, 255, 255)),
("#ffffff", (255, 255, 255)),
("#000080", (0, 0, 128)),
)
for hex_value, triplet in test_pairs:
result = webcolors.hex_to_rgb(hex_value)
assert isinstance(result, webcolors.IntegerRGB)
assert triplet == result
def test_hex_to_rgb_percent(self):
"""
Test conversion from hex to percent RGB triplet.
"""
test_pairs = (
("#fff", ("100%", "100%", "100%")),
("#ffffff", ("100%", "100%", "100%")),
("#000080", ("0%", "0%", "50%")),
)
for hex_value, triplet in test_pairs:
result = webcolors.hex_to_rgb_percent(hex_value)
assert isinstance(result, webcolors.PercentRGB)
assert triplet == result
class IntegerRGBConversionTests(unittest.TestCase):
"""
Test the functions which convert from integer RGB triplets to
other formats.
"""
def test_rgb_to_name(self):
"""
Test conversion from integer RGB triplet to color name.
"""
test_pairs = (
((255, 255, 255), "white"),
((0, 0, 128), "navy"),
((218, 165, 32), "goldenrod"),
(webcolors.IntegerRGB(218, 165, 32), "goldenrod"),
)
for triplet, name in test_pairs:
assert name == webcolors.rgb_to_name(triplet)
def test_rgb_to_name_unnamed(self):
"""
An integer RGB triplet which does not correspond to a named
color, or does not correspond to a named color in the given
specification, raises ValueError.
"""
# No name in any spec.
self.assertRaises(ValueError, webcolors.rgb_to_name, (18, 52, 86))
# This is 'goldenrod' in CSS 3 list, unnamed in HTML 4.
self.assertRaises(
ValueError, webcolors.rgb_to_name, (218, 165, 32), spec=webcolors.HTML4
)
def test_rgb_to_name_specs(self):
"""
Using one of the supported specifications succeeds; an
unsupported specification raises ValueError.
"""
for supported_spec in webcolors.constants.SUPPORTED_SPECIFICATIONS:
result = webcolors.rgb_to_name((255, 255, 255), spec=supported_spec)
assert "white" == result
for unsupported_spec in ("css1", "css4", "html5"):
self.assertRaises(
ValueError,
webcolors.rgb_to_name,
(255, 255, 255),
spec=unsupported_spec,
)
def test_rgb_to_hex(self):
"""
Test conversion from integer RGB triplet to hex.
"""
test_pairs = (
((255, 255, 255), "#ffffff"),
((0, 0, 128), "#000080"),
((218, 165, 32), "#daa520"),
)
for triplet, hex_value in test_pairs:
assert hex_value == webcolors.rgb_to_hex(triplet)
def test_rgb_to_rgb_percent(self):
"""
Test conversion from integer RGB triplet to percent RGB
triplet.
"""
test_pairs = (
((255, 255, 255), ("100%", "100%", "100%")),
((0, 0, 128), ("0%", "0%", "50%")),
((218, 165, 32), ("85.49%", "64.71%", "12.5%")),
)
for triplet, percent_triplet in test_pairs:
result = webcolors.rgb_to_rgb_percent(triplet)
assert isinstance(result, webcolors.PercentRGB)
assert percent_triplet == result
class NameConversionTests(unittest.TestCase):
"""
Test the functions which convert from color names to other
formats.
"""
def test_name_to_hex(self):
"""
Test correct conversion of color names to hex.
"""
test_pairs = (
("white", "#ffffff"),
("navy", "#000080"),
("goldenrod", "#daa520"),
)
for name, hex_value in test_pairs:
assert hex_value == webcolors.name_to_hex(name)
def test_name_to_hex_bad_name(self):
"""
A name which does not correspond to a color, or does not
correspond to a color in the given specification, raises
ValueError.
"""
test_values = (
{"name": "goldenrod", "spec": "html4"},
{"name": "glue", "spec": "css21"},
{"name": "breen", "spec": "css3"},
)
for kwarg_dict in test_values:
self.assertRaises(ValueError, webcolors.name_to_hex, **kwarg_dict)
def test_name_to_hex_specs(self):
"""
Using one of the supported specifications succeeds; using an
unsupported specification raises ValueError.
"""
for supported_spec in webcolors.constants.SUPPORTED_SPECIFICATIONS:
result = webcolors.name_to_hex("white", spec=supported_spec)
assert "#ffffff" == result
for unsupported_spec in ("css1", "css4", "html5"):
self.assertRaises(
ValueError, webcolors.name_to_hex, "white", spec=unsupported_spec
)
def test_name_to_rgb(self):
"""
Test conversion from color name to integer RGB triplet.
"""
test_pairs = (
("white", (255, 255, 255)),
("navy", (0, 0, 128)),
("goldenrod", (218, 165, 32)),
)
for name, triplet in test_pairs:
result = webcolors.name_to_rgb(name)
assert isinstance(result, webcolors.IntegerRGB)
assert triplet == result
def test_name_to_rgb_percent(self):
"""
Test conversion from color name to percent RGB triplet.
"""
test_pairs = (
("white", ("100%", "100%", "100%")),
("navy", ("0%", "0%", "50%")),
("goldenrod", ("85.49%", "64.71%", "12.5%")),
)
for name, triplet in test_pairs:
result = webcolors.name_to_rgb_percent(name)
assert isinstance(result, webcolors.PercentRGB)
assert triplet == result
class PercentRGBConversionTests(unittest.TestCase):
"""
Test the functions which convert from percent RGB triplets to
other formats.
"""
def test_rgb_percent_to_name(self):
"""
Test conversion from percent RGB triplet to color name.
"""
test_pairs = (
(("100%", "100%", "100%"), "white"),
(("0%", "0%", "50%"), "navy"),
(("85.49%", "64.71%", "12.5%"), "goldenrod"),
(webcolors.PercentRGB("85.49%", "64.71%", "12.5%"), "goldenrod"),
)
for triplet, name in test_pairs:
assert name == webcolors.rgb_percent_to_name(triplet)
def test_rgb_percent_to_name_unnamed(self):
"""
A percent RGB triplet which does not correspond to a named
color, or does not correspond to a named color in the given
specification, raises ValueError.
"""
# No name in any spec.
self.assertRaises(
ValueError, webcolors.rgb_percent_to_name, ("7.06%", "20.39%", "33.73%")
)
# This is 'goldenrod' in CSS 3 list, unnamed in HTML 4.
self.assertRaises(
ValueError,
webcolors.rgb_percent_to_name,
("85.49%", "64.71%", "12.5%"),
spec=webcolors.HTML4,
)
def test_rgb_percent_to_name_specs(self):
"""
Using one of the supported specifications succeeds; an
unsupported specification raises ValueError.
"""
for supported_spec in ("html4", "css2", "css21", "css3"):
result = webcolors.rgb_percent_to_name(
("100%", "100%", "100%"), spec=supported_spec
)
assert "white" == result
for unsupported_spec in ("css1", "css4", "html5"):
self.assertRaises(
ValueError,
webcolors.rgb_percent_to_name,
("100%", "100%", "100%"),
spec=unsupported_spec,
)
def test_rgb_percent_to_hex(self):
"""
Test conversion from percent RGB triplet to hex.
"""
test_pairs = (
(("100%", "100%", "0%"), "#ffff00"),
(("0%", "0%", "50%"), "#000080"),
(("85.49%", "64.71%", "12.5%"), "#daa520"),
)
for triplet, hex_value in test_pairs:
assert hex_value == webcolors.rgb_percent_to_hex(triplet)
def test_rgb_percent_to_rgb(self):
"""
Test conversion from percent RGB triplet to integer RGB
triplet.
"""
test_pairs = (
(("100%", "100%", "0%"), (255, 255, 0)),
(("0%", "0%", "50%"), (0, 0, 128)),
(("85.49%", "64.71%", "12.5%"), (218, 165, 32)),
)
for triplet, int_triplet in test_pairs:
result = webcolors.rgb_percent_to_rgb(triplet)
assert isinstance(result, webcolors.IntegerRGB)
assert int_triplet == result
class ConversionTests(unittest.TestCase):
"""
Test other aspects of convevrsion not covered by format-specific
test cases.
"""
def test_spelling_variants(self):
"""
When asked to name a 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.
"""
test_values = (
(
"#a9a9a9",
(169, 169, 169),
("66.27%", "66.27%", "66.27%"),
"darkgray",
),
(
"#2f4f4f",
(47, 79, 79),
("18.43%", "30.98%", "30.98%"),
"darkslategray",
),
(
"#696969",
(105, 105, 105),
("41.18%", "41.18%", "41.18%"),
"dimgray",
),
("#808080", (128, 128, 128), ("50%", "50%", "50%"), "gray"),
(
"#d3d3d3",
(211, 211, 211),
("82.75%", "82.75%", "82.75%"),
"lightgray",
),
(
"#d3d3d3",
(211, 211, 211),
("82.75%", "82.75%", "82.75%"),
"lightgray",
),
(
"#778899",
(119, 136, 153),
("46.67%", "53.33%", "60.00%"),
"lightslategray",
),
("#708090", (112, 128, 144), ("43.92%", "50%", "56.47%"), "slategray"),
)
for hex_value, int_tuple, percent_tuple, name in test_values:
for converter, value in (
(webcolors.hex_to_name, hex_value),
(webcolors.rgb_to_name, int_tuple),
(webcolors.rgb_percent_to_name, percent_tuple),
):
assert name == converter(value, spec=webcolors.CSS3)
|
