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import pytest
from rich.color import Color as RichColor
from textual.color import Color, Gradient, Lab, lab_to_rgb, rgb_to_lab
def test_rich_color():
"""Check conversion to Rich color."""
assert Color(10, 20, 30, 1.0).rich_color == RichColor.from_rgb(10, 20, 30)
assert Color.from_rich_color(RichColor.from_rgb(10, 20, 30)) == Color(
10, 20, 30, 1.0
)
def test_normalized():
assert Color(255, 128, 64).normalized == pytest.approx((1.0, 128 / 255, 64 / 255))
def test_clamped():
assert Color(300, 100, -20, 1.5).clamped == Color(255, 100, 0, 1.0)
def test_css():
"""Check conversion to CSS style"""
assert Color(10, 20, 30, 1.0).css == "rgb(10,20,30)"
assert Color(10, 20, 30, 0.5).css == "rgba(10,20,30,0.5)"
assert Color(0, 0, 0, 0, ansi=1).css == "ansi_red"
assert Color(10, 20, 30, 0.5, 0, True).css == "auto 50%"
assert Color.automatic(70.5).css == "auto 70.5%"
def test_monochrome():
assert Color(10, 20, 30).monochrome == Color(19, 19, 19)
assert Color(10, 20, 30, 0.5).monochrome == Color(19, 19, 19, 0.5)
assert Color(255, 255, 255).monochrome == Color(255, 255, 255)
assert Color(0, 0, 0).monochrome == Color(0, 0, 0)
def test_rgb():
assert Color(10, 20, 30, 0.55).rgb == (10, 20, 30)
def test_hsl():
red = Color(200, 20, 32)
print(red.hsl)
assert red.hsl == pytest.approx(
(0.9888888888888889, 0.818181818181818, 0.43137254901960786)
)
assert Color.from_hsl(
0.9888888888888889, 0.818181818181818, 0.43137254901960786
).normalized == pytest.approx(red.normalized, rel=1e-5)
assert red.hsl.css == "hsl(356,81.8%,43.1%)"
def test_color_brightness():
assert Color(255, 255, 255).brightness == 1
assert Color(0, 0, 0).brightness == 0
assert Color(127, 127, 127).brightness == pytest.approx(0.49803921568627446)
assert Color(255, 127, 64).brightness == pytest.approx(0.6199607843137255)
def test_color_hex():
assert Color(255, 0, 127).hex == "#FF007F"
assert Color(255, 0, 127, 0.5).hex == "#FF007F7F"
def test_color_hex6():
assert Color(0, 0, 0).hex6 == "#000000"
assert Color(255, 255, 255, 0.25).hex6 == "#FFFFFF"
assert Color(255, 0, 127, 0.5).hex6 == "#FF007F"
def test_color_css():
assert Color(255, 0, 127).css == "rgb(255,0,127)"
assert Color(255, 0, 127, 0.5).css == "rgba(255,0,127,0.5)"
def test_color_with_alpha():
assert Color(255, 50, 100).with_alpha(0.25) == Color(255, 50, 100, 0.25)
def test_multiply_alpha():
assert Color(100, 100, 100).multiply_alpha(0.5) == Color(100, 100, 100, 0.5)
assert Color(100, 100, 100, 0.5).multiply_alpha(0.5) == Color(100, 100, 100, 0.25)
def test_color_blend():
assert Color(0, 0, 0).blend(Color(255, 255, 255), 0) == Color(0, 0, 0)
assert Color(0, 0, 0).blend(Color(255, 255, 255), 1.0) == Color(255, 255, 255)
assert Color(0, 0, 0).blend(Color(255, 255, 255), 0.5) == Color(127, 127, 127)
@pytest.mark.parametrize(
"text,expected",
[
("#000000", Color(0, 0, 0, 1.0)),
("#ffffff", Color(255, 255, 255, 1.0)),
("#FFFFFF", Color(255, 255, 255, 1.0)),
("#fab", Color(255, 170, 187, 1.0)), # #ffaabb
("#fab0", Color(255, 170, 187, 0.0)), # #ffaabb00
("#020304ff", Color(2, 3, 4, 1.0)),
("#02030400", Color(2, 3, 4, 0.0)),
("#0203040f", Color(2, 3, 4, 0.058823529411764705)),
("rgb(0,0,0)", Color(0, 0, 0, 1.0)),
("rgb(255,255,255)", Color(255, 255, 255, 1.0)),
("rgba(255,255,255,1)", Color(255, 255, 255, 1.0)),
("rgb(2,3,4)", Color(2, 3, 4, 1.0)),
("rgba(2,3,4,1.0)", Color(2, 3, 4, 1.0)),
("rgba(2,3,4,0.058823529411764705)", Color(2, 3, 4, 0.058823529411764705)),
("hsl(45,25%,25%)", Color(80, 72, 48)),
("hsla(45,25%,25%,0.35)", Color(80, 72, 48, 0.35)),
],
)
def test_color_parse(text, expected):
assert Color.parse(text) == expected
@pytest.mark.parametrize(
"input,output",
[
("rgb( 300, 300 , 300 )", Color(255, 255, 255)),
("rgba( 2 , 3 , 4, 1.0 )", Color(2, 3, 4, 1.0)),
("hsl( 45, 25% , 25% )", Color(80, 72, 48)),
("hsla( 45, 25% , 25%, 0.35 )", Color(80, 72, 48, 0.35)),
],
)
def test_color_parse_input_has_spaces(input, output):
assert Color.parse(input) == output
@pytest.mark.parametrize(
"input,output",
[
("rgb(300, 300, 300)", Color(255, 255, 255)),
("rgba(300, 300, 300, 300)", Color(255, 255, 255, 1.0)),
("hsl(400, 200%, 250%)", Color(255, 255, 255, 1.0)),
("hsla(400, 200%, 250%, 1.9)", Color(255, 255, 255, 1.0)),
],
)
def test_color_parse_clamp(input, output):
assert Color.parse(input) == output
def test_color_parse_hsl_negative_degrees():
assert Color.parse("hsl(-90, 50%, 50%)") == Color.parse("hsl(270, 50%, 50%)")
def test_color_parse_hsla_negative_degrees():
assert Color.parse("hsla(-45, 50%, 50%, 0.2)") == Color.parse(
"hsla(315, 50%, 50%, 0.2)"
)
def test_color_parse_color():
# as a convenience, if Color.parse is passed a color object, it will return it
color = Color(20, 30, 40, 0.5)
assert Color.parse(color) is color
@pytest.mark.parametrize(
["color1", "color2", "expected"],
[
# No alpha results in the RHS
(Color(1, 2, 3), Color(20, 30, 40), Color(20, 30, 40)),
# 0.9 alpha results in a blend 90% biased towards the RHS
(Color(50, 100, 200), Color(10, 20, 30, 0.9), Color(14, 28, 47)),
# Automatic color results in white or black
(Color(200, 200, 200), Color.automatic(), Color(0, 0, 0)),
(Color(20, 20, 20), Color.automatic(), Color(255, 255, 255)),
# An automatic color will pick white or black and blend towards that
(Color(200, 200, 200), Color.automatic(50), Color(100, 100, 100)),
# Not a color produces NotImplemented
(Color(1, 2, 3), "foo", NotImplemented),
],
)
def test_color_add(color1, color2, expected):
assert color1.__add__(color2) == expected
# Computed with http://www.easyrgb.com/en/convert.php,
# (r, g, b) values in sRGB to (L*, a*, b*) values in CIE-L*ab.
RGB_LAB_DATA = [
(10, 23, 73, 10.245, 15.913, -32.672),
(200, 34, 123, 45.438, 67.750, -8.008),
(0, 0, 0, 0, 0, 0),
(255, 255, 255, 100, 0, 0),
]
def test_color_darken():
assert Color(200, 210, 220).darken(1) == Color(0, 0, 0)
assert Color(200, 210, 220).darken(-1) == Color(255, 255, 255)
assert Color(200, 210, 220).darken(0.1) == Color(172, 182, 192)
assert Color(200, 210, 220).darken(0.5) == Color(71, 80, 88)
def test_color_lighten():
assert Color(200, 210, 220).lighten(1) == Color(255, 255, 255)
assert Color(200, 210, 220).lighten(-1) == Color(0, 0, 0)
assert Color(200, 210, 220).lighten(0.1) == Color(228, 238, 248)
@pytest.mark.parametrize(
"r, g, b, L_, a_, b_",
RGB_LAB_DATA,
)
def test_rgb_to_lab(r, g, b, L_, a_, b_):
"""Test conversion from the RGB color space to CIE-L*ab."""
rgb = Color(r, g, b)
lab = rgb_to_lab(rgb)
assert lab.L == pytest.approx(L_, abs=0.1)
assert lab.a == pytest.approx(a_, abs=0.1)
assert lab.b == pytest.approx(b_, abs=0.1)
@pytest.mark.parametrize(
"r, g, b, L_, a_, b_",
RGB_LAB_DATA,
)
def test_lab_to_rgb(r, g, b, L_, a_, b_):
"""Test conversion from the CIE-L*ab color space to RGB."""
lab = Lab(L_, a_, b_)
rgb = lab_to_rgb(lab)
assert rgb.r == pytest.approx(r, abs=1)
assert rgb.g == pytest.approx(g, abs=1)
assert rgb.b == pytest.approx(b, abs=1)
def test_rgb_lab_rgb_roundtrip():
"""Test RGB -> CIE-L*ab -> RGB color conversion roundtripping."""
for r in range(0, 256, 32):
for g in range(0, 256, 32):
for b in range(0, 256, 32):
c_ = lab_to_rgb(rgb_to_lab(Color(r, g, b)))
assert c_.r == pytest.approx(r, abs=1)
assert c_.g == pytest.approx(g, abs=1)
assert c_.b == pytest.approx(b, abs=1)
def test_inverse():
assert Color(55, 0, 255, 0.1).inverse == Color(200, 255, 0, 0.1)
def test_gradient_errors():
with pytest.raises(ValueError):
Gradient()
with pytest.raises(ValueError):
Gradient((0.1, Color.parse("red")))
with pytest.raises(ValueError):
Gradient((0.1, Color.parse("red")), (1, Color.parse("blue")))
with pytest.raises(ValueError):
Gradient((0, Color.parse("red")))
with pytest.raises(ValueError):
Gradient(
(0, Color.parse("red")),
(0.8, Color.parse("blue")),
)
with pytest.raises(ValueError):
Gradient.from_colors(Color(200, 0, 0))
def test_gradient():
gradient = Gradient(
(0, Color(255, 0, 0)),
(0.5, "blue"),
(1, Color(0, 255, 0)),
quality=11,
)
assert gradient.get_color(-1) == Color(255, 0, 0)
assert gradient.get_color(0) == Color(255, 0, 0)
assert gradient.get_color(1) == Color(0, 255, 0)
assert gradient.get_color(1.2) == Color(0, 255, 0)
assert gradient.get_color(0.5) == Color(0, 0, 255)
assert gradient.get_color(0.7) == Color(0, 101, 153)
def test_is_transparent():
"""Check is_transparent is reporting correctly."""
assert Color(0, 0, 0, 0).is_transparent
assert Color(20, 20, 30, 0).is_transparent
assert not Color(20, 20, 30, a=0.01).is_transparent
assert not Color(20, 20, 30, a=1).is_transparent
assert not Color(20, 20, 30, 0, ansi=1).is_transparent
@pytest.mark.parametrize(
"base,tint,expected",
[
(
Color(0, 0, 0),
Color(10, 20, 30),
Color(10, 20, 30),
),
(
Color(0, 0, 0, 0.5),
Color(255, 255, 255, 0.5),
Color(127, 127, 127, 0.5),
),
(
Color(100, 0, 0, 0.2),
Color(0, 100, 0, 0.5),
Color(50, 50, 0, 0.2),
),
(Color(10, 20, 30), Color.parse("ansi_red"), Color(10, 20, 30)),
],
)
def test_tint(base: Color, tint: Color, expected: Color) -> None:
assert base.tint(tint) == expected
|
