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"""
Test the color-value normalization functions.
"""
import unittest
import webcolors
class NormalizationTests(unittest.TestCase):
"""
Test both the publicly-exposed and internal normalization
functions.
"""
def test_normalize_hex(self):
"""
Hexadecimal normalization normalizes valid hex color codes to
6 digits, lowercase.
"""
test_pairs = (
("#0099cc", "#0099cc"),
("#0099CC", "#0099cc"),
("#09c", "#0099cc"),
("#09C", "#0099cc"),
)
for raw, normalized in test_pairs:
assert normalized == webcolors.normalize_hex(raw)
def test_normalize_hex_format(self):
"""
Hex normalization raises ValueError on invalid hex color code.
"""
test_values = ("0099cc", "#0000gg", "#0000", "#00000000")
for value in test_values:
self.assertRaises(ValueError, webcolors.normalize_hex, value)
def test_normalize_integer_rgb(self):
"""
Integer normalization clips to 0-255.
"""
# pylint: disable=protected-access
test_pairs = ((255, 255), (0, 0), (128, 128), (-20, 0), (270, 255), (-0, 0))
for raw, normalized in test_pairs:
assert normalized == webcolors.normalization._normalize_integer_rgb(raw)
def test_normalize_integer_triplet(self):
"""
Integer triplet normalization clips all values to 0-255.
"""
test_pairs = (
((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)),
)
for triplet, normalized in test_pairs:
result = webcolors.normalize_integer_triplet(triplet)
assert isinstance(result, webcolors.IntegerRGB)
assert normalized == result
def test_normalize_percent_rgb(self):
"""
Percent normalization clips to 0%-100%.
"""
# pylint: disable=protected-access
test_pairs = (
("0%", "0%"),
("100%", "100%"),
("62%", "62%"),
("-5%", "0%"),
("250%", "100%"),
("85.49%", "85.49%"),
("-0%", "0%"),
)
for raw, normalized in test_pairs:
assert normalized == webcolors.normalization._normalize_percent_rgb(raw)
def test_normalize_percent_triplet(self):
"""
Percent triplet normalization clips all values to 0%-100%.
"""
test_pairs = (
(("50%", "50%", "50%"), ("50%", "50%", "50%")),
(("0%", "100%", "0%"), ("0%", "100%", "0%")),
(("-10%", "250%", "500%"), ("0%", "100%", "100%")),
(("-0%", "-0%", "-0%"), ("0%", "0%", "0%")),
)
for triplet, normalized in test_pairs:
result = webcolors.normalize_percent_triplet(triplet)
assert isinstance(result, webcolors.PercentRGB)
assert normalized == result
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