# -*- ruby encoding: utf-8 -*- require 'color' require 'minitest_helper' module TestColor class TestRGB < Minitest::Test def test_adjust_brightness assert_equal("#1a1aff", Color::RGB::Blue.adjust_brightness(10).html) assert_equal("#0000e6", Color::RGB::Blue.adjust_brightness(-10).html) end def test_adjust_hue assert_equal("#6600ff", Color::RGB::Blue.adjust_hue(10).html) assert_equal("#0066ff", Color::RGB::Blue.adjust_hue(-10).html) end def test_adjust_saturation assert_equal("#ef9374", Color::RGB::DarkSalmon.adjust_saturation(10).html) assert_equal("#e39980", Color::RGB::DarkSalmon.adjust_saturation(-10).html) end def test_red red = Color::RGB::Red.dup assert_in_delta(1.0, red.r, Color::COLOR_TOLERANCE) assert_in_delta(100, red.red_p, Color::COLOR_TOLERANCE) assert_in_delta(255, red.red, Color::COLOR_TOLERANCE) assert_in_delta(1.0, red.r, Color::COLOR_TOLERANCE) red.red_p = 33 assert_in_delta(0.33, red.r, Color::COLOR_TOLERANCE) red.red = 330 assert_in_delta(1.0, red.r, Color::COLOR_TOLERANCE) red.r = -3.3 assert_in_delta(0.0, red.r, Color::COLOR_TOLERANCE) end def test_green lime = Color::RGB::Lime.dup assert_in_delta(1.0, lime.g, Color::COLOR_TOLERANCE) assert_in_delta(100, lime.green_p, Color::COLOR_TOLERANCE) assert_in_delta(255, lime.green, Color::COLOR_TOLERANCE) lime.green_p = 33 assert_in_delta(0.33, lime.g, Color::COLOR_TOLERANCE) lime.green = 330 assert_in_delta(1.0, lime.g, Color::COLOR_TOLERANCE) lime.g = -3.3 assert_in_delta(0.0, lime.g, Color::COLOR_TOLERANCE) end def test_blue blue = Color::RGB::Blue.dup assert_in_delta(1.0, blue.b, Color::COLOR_TOLERANCE) assert_in_delta(255, blue.blue, Color::COLOR_TOLERANCE) assert_in_delta(100, blue.blue_p, Color::COLOR_TOLERANCE) blue.blue_p = 33 assert_in_delta(0.33, blue.b, Color::COLOR_TOLERANCE) blue.blue = 330 assert_in_delta(1.0, blue.b, Color::COLOR_TOLERANCE) blue.b = -3.3 assert_in_delta(0.0, blue.b, Color::COLOR_TOLERANCE) end def test_brightness assert_in_delta(0.0, Color::RGB::Black.brightness, Color::COLOR_TOLERANCE) assert_in_delta(0.5, Color::RGB::Grey50.brightness, Color::COLOR_TOLERANCE) assert_in_delta(1.0, Color::RGB::White.brightness, Color::COLOR_TOLERANCE) end def test_darken_by assert_in_delta(0.5, Color::RGB::Blue.darken_by(50).b, Color::COLOR_TOLERANCE) end def test_html assert_equal("#000000", Color::RGB::Black.html) assert_equal(Color::RGB::Black, Color::RGB.from_html("#000000")) assert_equal("#0000ff", Color::RGB::Blue.html) assert_equal("#00ff00", Color::RGB::Lime.html) assert_equal("#ff0000", Color::RGB::Red.html) assert_equal("#ffffff", Color::RGB::White.html) assert_equal("rgb(0.00%, 0.00%, 0.00%)", Color::RGB::Black.css_rgb) assert_equal("rgb(0.00%, 0.00%, 100.00%)", Color::RGB::Blue.css_rgb) assert_equal("rgb(0.00%, 100.00%, 0.00%)", Color::RGB::Lime.css_rgb) assert_equal("rgb(100.00%, 0.00%, 0.00%)", Color::RGB::Red.css_rgb) assert_equal("rgb(100.00%, 100.00%, 100.00%)", Color::RGB::White.css_rgb) assert_equal("rgba(0.00%, 0.00%, 0.00%, 1.00)", Color::RGB::Black.css_rgba) assert_equal("rgba(0.00%, 0.00%, 100.00%, 1.00)", Color::RGB::Blue.css_rgba) assert_equal("rgba(0.00%, 100.00%, 0.00%, 1.00)", Color::RGB::Lime.css_rgba) assert_equal("rgba(100.00%, 0.00%, 0.00%, 1.00)", Color::RGB::Red.css_rgba) assert_equal("rgba(100.00%, 100.00%, 100.00%, 1.00)", Color::RGB::White.css_rgba) assert_equal("rgba(100.00%, 0.00%, 0.00%, 0.50)", Color::RGB::Red.css_rgba(0.5)) end def test_lighten_by assert_in_delta(1.0, Color::RGB::Blue.lighten_by(50).b, Color::COLOR_TOLERANCE) assert_in_delta(0.5, Color::RGB::Blue.lighten_by(50).r, Color::COLOR_TOLERANCE) assert_in_delta(0.5, Color::RGB::Blue.lighten_by(50).g, Color::COLOR_TOLERANCE) end def test_mix_with assert_in_delta(0.5, Color::RGB::Red.mix_with(Color::RGB::Blue, 50).r, Color::COLOR_TOLERANCE) assert_in_delta(0.0, Color::RGB::Red.mix_with(Color::RGB::Blue, 50).g, Color::COLOR_TOLERANCE) assert_in_delta(0.5, Color::RGB::Red.mix_with(Color::RGB::Blue, 50).b, Color::COLOR_TOLERANCE) assert_in_delta(0.5, Color::RGB::Blue.mix_with(Color::RGB::Red, 50).r, Color::COLOR_TOLERANCE) assert_in_delta(0.0, Color::RGB::Blue.mix_with(Color::RGB::Red, 50).g, Color::COLOR_TOLERANCE) assert_in_delta(0.5, Color::RGB::Blue.mix_with(Color::RGB::Red, 50).b, Color::COLOR_TOLERANCE) end def test_pdf_fill assert_equal("0.000 0.000 0.000 rg", Color::RGB::Black.pdf_fill) assert_equal("0.000 0.000 1.000 rg", Color::RGB::Blue.pdf_fill) assert_equal("0.000 1.000 0.000 rg", Color::RGB::Lime.pdf_fill) assert_equal("1.000 0.000 0.000 rg", Color::RGB::Red.pdf_fill) assert_equal("1.000 1.000 1.000 rg", Color::RGB::White.pdf_fill) assert_equal("0.000 0.000 0.000 RG", Color::RGB::Black.pdf_stroke) assert_equal("0.000 0.000 1.000 RG", Color::RGB::Blue.pdf_stroke) assert_equal("0.000 1.000 0.000 RG", Color::RGB::Lime.pdf_stroke) assert_equal("1.000 0.000 0.000 RG", Color::RGB::Red.pdf_stroke) assert_equal("1.000 1.000 1.000 RG", Color::RGB::White.pdf_stroke) end def test_to_cmyk assert_kind_of(Color::CMYK, Color::RGB::Black.to_cmyk) assert_equal(Color::CMYK.new(0, 0, 0, 100), Color::RGB::Black.to_cmyk) assert_equal(Color::CMYK.new(0, 0, 100, 0), Color::RGB::Yellow.to_cmyk) assert_equal(Color::CMYK.new(100, 0, 0, 0), Color::RGB::Cyan.to_cmyk) assert_equal(Color::CMYK.new(0, 100, 0, 0), Color::RGB::Magenta.to_cmyk) assert_equal(Color::CMYK.new(0, 100, 100, 0), Color::RGB::Red.to_cmyk) assert_equal(Color::CMYK.new(100, 0, 100, 0), Color::RGB::Lime.to_cmyk) assert_equal(Color::CMYK.new(100, 100, 0, 0), Color::RGB::Blue.to_cmyk) assert_equal(Color::CMYK.new(10.32, 60.52, 10.32, 39.47), Color::RGB::Purple.to_cmyk) assert_equal(Color::CMYK.new(10.90, 59.13, 59.13, 24.39), Color::RGB::Brown.to_cmyk) assert_equal(Color::CMYK.new(0, 63.14, 18.43, 0), Color::RGB::Carnation.to_cmyk) assert_equal(Color::CMYK.new(7.39, 62.69, 62.69, 37.32), Color::RGB::Cayenne.to_cmyk) end def test_to_grayscale assert_kind_of(Color::GrayScale, Color::RGB::Black.to_grayscale) assert_equal(Color::GrayScale.from_fraction(0), Color::RGB::Black.to_grayscale) assert_equal(Color::GrayScale.from_fraction(0.5), Color::RGB::Yellow.to_grayscale) assert_equal(Color::GrayScale.from_fraction(0.5), Color::RGB::Cyan.to_grayscale) assert_equal(Color::GrayScale.from_fraction(0.5), Color::RGB::Magenta.to_grayscale) assert_equal(Color::GrayScale.from_fraction(0.5), Color::RGB::Red.to_grayscale) assert_equal(Color::GrayScale.from_fraction(0.5), Color::RGB::Lime.to_grayscale) assert_equal(Color::GrayScale.from_fraction(0.5), Color::RGB::Blue.to_grayscale) assert_equal(Color::GrayScale.from_fraction(0.2510), Color::RGB::Purple.to_grayscale) assert_equal(Color::GrayScale.new(40.58), Color::RGB::Brown.to_grayscale) assert_equal(Color::GrayScale.new(68.43), Color::RGB::Carnation.to_grayscale) assert_equal(Color::GrayScale.new(27.65), Color::RGB::Cayenne.to_grayscale) end def test_to_hsl assert_kind_of(Color::HSL, Color::RGB::Black.to_hsl) assert_equal(Color::HSL.new, Color::RGB::Black.to_hsl) assert_equal(Color::HSL.new(60, 100, 50), Color::RGB::Yellow.to_hsl) assert_equal(Color::HSL.new(180, 100, 50), Color::RGB::Cyan.to_hsl) assert_equal(Color::HSL.new(300, 100, 50), Color::RGB::Magenta.to_hsl) assert_equal(Color::HSL.new(0, 100, 50), Color::RGB::Red.to_hsl) assert_equal(Color::HSL.new(120, 100, 50), Color::RGB::Lime.to_hsl) assert_equal(Color::HSL.new(240, 100, 50), Color::RGB::Blue.to_hsl) assert_equal(Color::HSL.new(300, 100, 25.10), Color::RGB::Purple.to_hsl) assert_equal(Color::HSL.new(0, 59.42, 40.59), Color::RGB::Brown.to_hsl) assert_equal(Color::HSL.new(317.5, 100, 68.43), Color::RGB::Carnation.to_hsl) assert_equal(Color::HSL.new(0, 100, 27.64), Color::RGB::Cayenne.to_hsl) assert_equal("hsl(0.00, 0.00%, 0.00%)", Color::RGB::Black.css_hsl) assert_equal("hsl(60.00, 100.00%, 50.00%)", Color::RGB::Yellow.css_hsl) assert_equal("hsl(180.00, 100.00%, 50.00%)", Color::RGB::Cyan.css_hsl) assert_equal("hsl(300.00, 100.00%, 50.00%)", Color::RGB::Magenta.css_hsl) assert_equal("hsl(0.00, 100.00%, 50.00%)", Color::RGB::Red.css_hsl) assert_equal("hsl(120.00, 100.00%, 50.00%)", Color::RGB::Lime.css_hsl) assert_equal("hsl(240.00, 100.00%, 50.00%)", Color::RGB::Blue.css_hsl) assert_equal("hsl(300.00, 100.00%, 25.10%)", Color::RGB::Purple.css_hsl) assert_equal("hsl(0.00, 59.42%, 40.59%)", Color::RGB::Brown.css_hsl) assert_equal("hsl(317.52, 100.00%, 68.43%)", Color::RGB::Carnation.css_hsl) assert_equal("hsl(0.00, 100.00%, 27.65%)", Color::RGB::Cayenne.css_hsl) assert_equal("hsla(0.00, 0.00%, 0.00%, 1.00)", Color::RGB::Black.css_hsla) assert_equal("hsla(60.00, 100.00%, 50.00%, 1.00)", Color::RGB::Yellow.css_hsla) assert_equal("hsla(180.00, 100.00%, 50.00%, 1.00)", Color::RGB::Cyan.css_hsla) assert_equal("hsla(300.00, 100.00%, 50.00%, 1.00)", Color::RGB::Magenta.css_hsla) assert_equal("hsla(0.00, 100.00%, 50.00%, 1.00)", Color::RGB::Red.css_hsla) assert_equal("hsla(120.00, 100.00%, 50.00%, 1.00)", Color::RGB::Lime.css_hsla) assert_equal("hsla(240.00, 100.00%, 50.00%, 1.00)", Color::RGB::Blue.css_hsla) assert_equal("hsla(300.00, 100.00%, 25.10%, 1.00)", Color::RGB::Purple.css_hsla) assert_equal("hsla(0.00, 59.42%, 40.59%, 1.00)", Color::RGB::Brown.css_hsla) assert_equal("hsla(317.52, 100.00%, 68.43%, 1.00)", Color::RGB::Carnation.css_hsla) assert_equal("hsla(0.00, 100.00%, 27.65%, 1.00)", Color::RGB::Cayenne.css_hsla) # The following tests a bug reported by Jean Krohn on 10 June 2006 # where HSL conversion was not quite correct, resulting in a bad # round-trip. assert_equal("#008800", Color::RGB.from_html("#008800").to_hsl.html) refute_equal("#002288", Color::RGB.from_html("#008800").to_hsl.html) # The following tests a bug reported by Adam Johnson on 29 October # 2010. hsl = Color::HSL.new(262, 67, 42) c = Color::RGB.from_fraction(0.34496, 0.1386, 0.701399).to_hsl assert_in_delta hsl.h, c.h, Color::COLOR_TOLERANCE, "Hue" assert_in_delta hsl.s, c.s, Color::COLOR_TOLERANCE, "Saturation" assert_in_delta hsl.l, c.l, Color::COLOR_TOLERANCE, "Luminance" end def test_to_rgb assert_same(Color::RGB::Black, Color::RGB::Black.to_rgb) end def test_to_yiq assert_kind_of(Color::YIQ, Color::RGB::Black.to_yiq) assert_equal(Color::YIQ.new, Color::RGB::Black.to_yiq) assert_equal(Color::YIQ.new(88.6, 32.1, 0), Color::RGB::Yellow.to_yiq) assert_equal(Color::YIQ.new(70.1, 0, 0), Color::RGB::Cyan.to_yiq) assert_equal(Color::YIQ.new(41.3, 27.5, 52.3), Color::RGB::Magenta.to_yiq) assert_equal(Color::YIQ.new(29.9, 59.6, 21.2), Color::RGB::Red.to_yiq) assert_equal(Color::YIQ.new(58.7, 0, 0), Color::RGB::Lime.to_yiq) assert_equal(Color::YIQ.new(11.4, 0, 31.1), Color::RGB::Blue.to_yiq) assert_equal(Color::YIQ.new(20.73, 13.80, 26.25), Color::RGB::Purple.to_yiq) assert_equal(Color::YIQ.new(30.89, 28.75, 10.23), Color::RGB::Brown.to_yiq) assert_equal(Color::YIQ.new(60.84, 23.28, 27.29), Color::RGB::Carnation.to_yiq) assert_equal(Color::YIQ.new(16.53, 32.96, 11.72), Color::RGB::Cayenne.to_yiq) end def test_to_lab # Luminosity can be an absolute. assert_in_delta(0.0, Color::RGB::Black.to_lab[:L], Color::COLOR_TOLERANCE) assert_in_delta(100.0, Color::RGB::White.to_lab[:L], Color::COLOR_TOLERANCE) # It's not really possible to have absolute # numbers here because of how L*a*b* works, but # negative/positive comparisons work assert(Color::RGB::Green.to_lab[:a] < 0) assert(Color::RGB::Magenta.to_lab[:a] > 0) assert(Color::RGB::Blue.to_lab[:b] < 0) assert(Color::RGB::Yellow.to_lab[:b] > 0) end def test_closest_match # It should match Blue to Indigo (very simple match) match_from = [Color::RGB::Red, Color::RGB::Green, Color::RGB::Blue] assert_equal(Color::RGB::Blue, Color::RGB::Indigo.closest_match(match_from)) # But fails if using the :just_noticeable difference. assert_nil(Color::RGB::Indigo.closest_match(match_from, :just_noticeable)) # Crimson & Firebrick are visually closer than DarkRed and Firebrick # (more precise match) match_from += [Color::RGB::DarkRed, Color::RGB::Crimson] assert_equal(Color::RGB::Crimson, Color::RGB::Firebrick.closest_match(match_from)) # Specifying a threshold low enough will cause even that match to # fail, though. assert_nil(Color::RGB::Firebrick.closest_match(match_from, 8.0)) # If the match_from list is an empty array, it also returns nil assert_nil(Color::RGB::Red.closest_match([])) # RGB::Green is 0,128,0, so we'll pick something VERY close to it, visually jnd_green = Color::RGB.new(3, 132, 3) assert_equal(Color::RGB::Green, jnd_green.closest_match(match_from, :jnd)) # And then something that's just barely out of the tolerance range diff_green = Color::RGB.new(9, 142, 9) assert_nil(diff_green.closest_match(match_from, :jnd)) end def test_add white = Color::RGB::Cyan + Color::RGB::Yellow refute_nil(white) assert_equal(Color::RGB::White, white) c1 = Color::RGB.new(0x80, 0x80, 0x00) c2 = Color::RGB.new(0x45, 0x20, 0xf0) cr = Color::RGB.new(0xc5, 0xa0, 0xf0) assert_equal(cr, c1 + c2) end def test_subtract black = Color::RGB::LightCoral - Color::RGB::Honeydew assert_equal(Color::RGB::Black, black) c1 = Color::RGB.new(0x85, 0x80, 0x00) c2 = Color::RGB.new(0x40, 0x20, 0xf0) cr = Color::RGB.new(0x45, 0x60, 0x00) assert_equal(cr, c1 - c2) end def test_mean_grayscale c1 = Color::RGB.new(0x85, 0x80, 0x00) c1_max = c1.max_rgb_as_greyscale c1_max = c1.max_rgb_as_greyscale c1_result = Color::GrayScale.from_fraction(0x85 / 255.0) assert_equal(c1_result, c1_max) end def test_from_html assert_equal("RGB [#333333]", Color::RGB.from_html("#333").inspect) assert_equal("RGB [#333333]", Color::RGB.from_html("333").inspect) assert_equal("RGB [#555555]", Color::RGB.from_html("#555555").inspect) assert_equal("RGB [#555555]", Color::RGB.from_html("555555").inspect) assert_raises(ArgumentError) { Color::RGB.from_html("#5555555") } assert_raises(ArgumentError) { Color::RGB.from_html("5555555") } assert_raises(ArgumentError) { Color::RGB.from_html("#55555") } assert_raises(ArgumentError) { Color::RGB.from_html("55555") } end def test_by_hex assert_same(Color::RGB::Cyan, Color::RGB.by_hex('#0ff')) assert_same(Color::RGB::Cyan, Color::RGB.by_hex('#00ffff')) assert_equal("RGB [#333333]", Color::RGB.by_hex("#333").inspect) assert_equal("RGB [#333333]", Color::RGB.by_hex("333").inspect) assert_raises(ArgumentError) { Color::RGB.by_hex("5555555") } assert_raises(ArgumentError) { Color::RGB.by_hex("#55555") } assert_equal(:boom, Color::RGB.by_hex('#55555') { :boom }) end def test_by_name assert_same(Color::RGB::Cyan, Color::RGB.by_name('cyan')) fetch_error = if RUBY_VERSION < "1.9" IndexError else KeyError end assert_raises(fetch_error) { Color::RGB.by_name('cyanide') } assert_equal(:boom, Color::RGB.by_name('cyanide') { :boom }) end def test_by_css assert_same(Color::RGB::Cyan, Color::RGB.by_css('#0ff')) assert_same(Color::RGB::Cyan, Color::RGB.by_css('cyan')) assert_raises(ArgumentError) { Color::RGB.by_css('cyanide') } assert_equal(:boom, Color::RGB.by_css('cyanide') { :boom }) end def test_extract_colors assert_equal([ Color::RGB::BlanchedAlmond, Color::RGB::Cyan ], Color::RGB.extract_colors('BlanchedAlmond is a nice shade, but #00ffff is not.')) end def test_inspect assert_equal("RGB [#000000]", Color::RGB::Black.inspect) assert_equal("RGB [#0000ff]", Color::RGB::Blue.inspect) assert_equal("RGB [#00ff00]", Color::RGB::Lime.inspect) assert_equal("RGB [#ff0000]", Color::RGB::Red.inspect) assert_equal("RGB [#ffffff]", Color::RGB::White.inspect) end end end