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# frozen_string_literal: true
require "color"
require "minitest_helper"
module TestColor
class TestHSL < Minitest::Test
def setup
@hsl = Color::HSL.from_values(145, 20, 30)
end
def test_rgb_roundtrip_conversion
hsl = Color::HSL.from_values(262, 67, 42)
c = hsl.to_rgb.to_hsl
assert_in_tolerance hsl.h, c.h, "Hue"
assert_in_tolerance hsl.s, c.s, "Saturation"
assert_in_tolerance hsl.l, c.l, "Luminance"
end
def test_brightness
assert_in_tolerance 0.3, @hsl.brightness
end
def test_hue
assert_in_tolerance 0.4027, @hsl.h
assert_in_tolerance 145, @hsl.hue
# @hsl.hue = 33
# assert_in_tolerance 0.09167, @hsl.h
# @hsl.hue = -33
# assert_in_tolerance 0.90833, @hsl.h
# @hsl.h = 3.3
# assert_in_tolerance 360, @hsl.hue
# @hsl.h = -3.3
# assert_in_tolerance 0.0, @hsl.h
# @hsl.hue = 0
# @hsl.hue -= 20
# assert_in_tolerance 340, @hsl.hue
# @hsl.hue += 45
# assert_in_tolerance 25, @hsl.hue
end
def test_saturation
assert_in_tolerance 0.2, @hsl.s
assert_in_tolerance 20, @hsl.saturation
# @hsl.saturation = 33
# assert_in_tolerance 0.33, @hsl.s
# @hsl.s = 3.3
# assert_in_tolerance 100, @hsl.saturation
# @hsl.s = -3.3
# assert_in_tolerance 0.0, @hsl.s
end
def test_luminance
assert_in_tolerance 0.3, @hsl.l
assert_in_tolerance 30, @hsl.luminosity
# @hsl.luminosity = 33
# assert_in_tolerance 0.33, @hsl.l
# @hsl.l = 3.3
# assert_in_tolerance 100, @hsl.lightness
# @hsl.l = -3.3
# assert_in_tolerance 0.0, @hsl.l
end
def test_css
assert_equal "hsl(145.00deg 20.00% 30.00%)", @hsl.css
assert_equal "hsl(145.00deg 20.00% 30.00% / 1.00)", @hsl.css(alpha: 1)
end
def test_mix_with
red = Color::RGB::Red.to_hsl
yellow = Color::RGB::Yellow.to_hsl
assert_in_tolerance 0, red.hue
assert_in_tolerance 60, yellow.hue
ry25 = red.mix_with yellow, 0.25
assert_in_tolerance 15, ry25.hue
ry50 = red.mix_with yellow, 0.50
assert_in_tolerance 30, ry50.hue
ry75 = red.mix_with yellow, 0.75
assert_in_tolerance 45, ry75.hue
end
def test_inspect
assert_equal "HSL [145.00deg 20.00% 30.00%]", @hsl.inspect
end
def test_pretty_print
assert_pretty_inspect "HSL\n[145.00deg\n 20.00%\n 30.00%]\n", @hsl
end
end
class TestHSLConversions < Minitest::Test
def setup
@hsl = Color::HSL.from_values(145, 20, 30)
end
def test_to_cmyk
cmyk = @hsl.to_cmyk
assert_kind_of(Color::CMYK, cmyk)
assert_in_tolerance(0.3223, cmyk.c)
assert_in_tolerance(0.2023, cmyk.m)
assert_in_tolerance(0.2723, cmyk.y)
assert_in_tolerance(0.4377, cmyk.k)
assert_equal(Color::CMYK.from_percentage(0, 0, 0, 100), Color::HSL.from_values(0, 0, 0).to_cmyk)
end
def test_to_grayscale
gs = @hsl.to_grayscale
assert_kind_of(Color::Grayscale, gs)
assert_in_tolerance(30, gs.gray)
assert_equal(Color::Grayscale.from_fraction(0), Color::HSL.from_values(0, 0, 0).to_grayscale)
end
def test_to_hsl
assert_equal(@hsl, @hsl.to_hsl)
assert_kind_of(Color::HSL, @hsl.to_hsl)
end
def test_to_lab
lab = @hsl.to_lab
assert_kind_of(Color::CIELAB, lab)
assert_in_tolerance(36.19817, lab.l)
assert_in_tolerance(-15.6, lab.a)
assert_in_tolerance(6.72317, lab.b)
assert_equal(Color::CIELAB.from_values(0, 0, 0), Color::HSL.from_values(0, 0, 0).to_lab)
end
def test_to_rgb
rgb = @hsl.to_rgb
assert_kind_of(Color::RGB, rgb)
assert_in_tolerance(0.24, rgb.r)
assert_in_tolerance(0.36, rgb.g)
assert_in_tolerance(0.29, rgb.b)
# The following tests address a bug reported by Jean Krohn on June 6,
# 2006 and exercise some previously unexercised code in to_rgb.
assert_equal(Color::RGB::Black, Color::HSL.from_values(75, 75, 0))
assert_equal(Color::RGB::White, Color::HSL.from_values(75, 75, 100))
assert_equal(Color::RGB::Gray80, Color::HSL.from_values(75, 0, 80))
# The following tests a bug reported by Adam Johnson on 29 October
# 2010.
rgb = Color::RGB.from_fraction(0.34496, 0.1386, 0.701399)
c = Color::HSL.from_values(262, 67, 42).to_rgb
assert_in_tolerance(rgb.r, c.r, "Red")
assert_in_tolerance(rgb.g, c.g, "Green")
assert_in_tolerance(rgb.b, c.b, "Blue")
end
def test_to_xyz
xyz = @hsl.to_xyz
assert_kind_of(Color::XYZ, xyz)
assert_in_tolerance(0.069805, xyz.x)
assert_in_tolerance(0.091115, xyz.y)
assert_in_tolerance(0.078593, xyz.z)
assert_equal(Color::XYZ.from_values(0, 0, 0), Color::HSL.from_values(0, 0, 0).to_xyz)
end
def test_to_yiq
yiq = @hsl.to_yiq
assert_kind_of(Color::YIQ, yiq)
assert_in_tolerance(0.3161, yiq.y)
assert_in_tolerance(0.0, yiq.i)
assert_in_tolerance(0.0, yiq.q)
assert_equal(Color::YIQ.from_values(0, 0, 0), Color::HSL.from_values(0, 0, 0).to_yiq)
end
def test_to_internal
assert_equal([0.0, 0.0, 0.0], Color::HSL.from_values(0, 0, 0).to_internal)
end
end
end
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