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|
<!DOCTYPE html>
<html>
<!--
Copyright 2006 The Closure Library Authors. All Rights Reserved.
Use of this source code is governed by the Apache License, Version 2.0.
See the COPYING file for details.
-->
<head>
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<title>Closure Unit Tests - goog.color</title>
<script src="../base.js"></script>
<script>
goog.require('goog.array');
goog.require('goog.color');
goog.require('goog.color.names');
goog.require('goog.testing.jsunit');
</script>
</head>
<body>
<script>
function testIsValidColor() {
var goodColors = ['#ffffff', '#ff7812', '#012345', '#Ff003D', '#3CA',
'(255, 26, 75)', 'RGB(2, 3, 4)', '(0,0,0)', 'white',
'blue'];
var badColors = ['#xxxxxx', '8899000', 'not_color', '#1234567', 'fffffg',
'(2555,0,0)', '(1,2,3,4)', 'rgb(1,20,)', 'RGB(20,20,20,)',
'omgwtfbbq'];
for (var i = 0; i < goodColors.length; i++) {
assertTrue(goodColors[i], goog.color.isValidColor(goodColors[i]));
}
for (var i = 0; i < badColors.length; i++) {
assertFalse(badColors[i], goog.color.isValidColor(badColors[i]));
}
}
function testIsValidHexColor() {
var goodHexColors = ['#ffffff', '#ff7812', '#012345', '#Ff003D', '#3CA'];
var badHexColors = ['#xxxxxx', '889900', 'not_color', '#1234567', 'fffffg'];
for (var i = 0; i < goodHexColors.length; i++) {
assertTrue(goodHexColors[i], goog.color.isValidHexColor_(goodHexColors[i]));
}
for (var i = 0; i < badHexColors.length; i++) {
assertFalse(badHexColors[i], goog.color.isValidHexColor_(badHexColors[i]));
}
}
function testIsValidRgbColor() {
var goodRgbColors = ['(255, 26, 75)', 'RGB(2, 3, 4)', '(0,0,0)',
'rgb(255,255,255)'];
var badRgbColors = ['(2555,0,0)', '(1,2,3,4)', 'rgb(1,20,)',
'RGB(20,20,20,)'];
for (var i = 0; i < goodRgbColors.length; i++) {
assertEquals(goodRgbColors[i],
goog.color.isValidRgbColor_(goodRgbColors[i]).length, 3);
}
for (var i = 0; i < badRgbColors.length; i++) {
assertEquals(badRgbColors[i],
goog.color.isValidRgbColor_(badRgbColors[i]).length, 0);
}
}
function testParse() {
var colors = ['rgb(15, 250, 77)', '(127, 127, 127)', '#ffeedd', '123456',
'magenta'];
var parsed = goog.array.map(colors, goog.color.parse);
assertEquals('rgb', parsed[0].type);
assertEquals(goog.color.rgbToHex(15, 250, 77), parsed[0].hex);
assertEquals('rgb', parsed[1].type);
assertEquals(goog.color.rgbToHex(127, 127, 127), parsed[1].hex);
assertEquals('hex', parsed[2].type);
assertEquals('#ffeedd', parsed[2].hex);
assertEquals('hex', parsed[3].type);
assertEquals('#123456', parsed[3].hex);
assertEquals('named', parsed[4].type);
assertEquals('#ff00ff', parsed[4].hex);
var badColors = ['rgb(01, 1, 23)', '(256, 256, 256)', '#ffeeddaa'];
for (var i = 0; i < badColors.length; i++) {
var e = assertThrows(goog.partial(goog.color.parse, badColors[i]));
assertContains('is not a valid color string', e.message);
}
}
function testHexToRgb() {
var testColors = [['#B0FF2D', [176, 255, 45]],
['#b26e5f', [178, 110, 95]],
['#66f', [102, 102, 255]]];
for (var i = 0; i < testColors.length; i++) {
var r = goog.color.hexToRgb(testColors[i][0]);
var t = testColors[i][1];
assertEquals('Red channel should match.', t[0], r[0]);
assertEquals('Green channel should match.', t[1], r[1]);
assertEquals('Blue channel should match.', t[2], r[2]);
}
var badColors = ['', '#g00', 'some words'];
for (var i = 0; i < badColors.length; i++) {
var e = assertThrows(goog.partial(goog.color.hexToRgb, badColors[i]));
assertEquals("'" + badColors[i] + "' is not a valid hex color", e.message);
}
}
function testHexToRgbStyle() {
assertEquals('rgb(255,0,0)', goog.color.hexToRgbStyle(goog.color.names.red));
assertEquals('rgb(206,206,206)', goog.color.hexToRgbStyle('#cecece'));
assertEquals('rgb(51,204,170)', goog.color.hexToRgbStyle('#3CA'));
var badHexColors = ['#1234', null, undefined, '#.1234567890'];
for (var i = 0; i < badHexColors.length; ++i) {
var badHexColor = badHexColors[i];
var e = assertThrows(goog.partial(goog.color.hexToRgbStyle, badHexColor));
assertEquals("'" + badHexColor + "' is not a valid hex color", e.message);
}
}
function testRgbToHex() {
assertEquals(goog.color.names.red, goog.color.rgbToHex(255, 0, 0));
assertEquals('#af13ff', goog.color.rgbToHex(175, 19, 255));
var badRgb = [[-1, -1, -1], [256, 0, 0], ['a', 'b', 'c'], [undefined, 5, 5]];
for (var i = 0; i < badRgb.length; ++i) {
var e = assertThrows(goog.partial(goog.color.rgbArrayToHex, badRgb[i]));
assertContains('is not a valid RGB color', e.message);
}
}
function testRgbToHsl() {
var rgb = [255, 171, 32];
var hsl = goog.color.rgbArrayToHsl(rgb);
assertEquals(37, hsl[0]);
assertTrue(1.0 - hsl[1] < 0.01);
assertTrue(hsl[2] - .5625 < 0.01);
}
function testHslToRgb() {
var hsl = [60, 0.5, 0.1];
var rgb = goog.color.hslArrayToRgb(hsl);
assertEquals(38, rgb[0]);
assertEquals(38, rgb[1]);
assertEquals(13, rgb[2]);
}
// Tests accuracy of HSL to RGB conversion
function testHSLBidiToRGB() {
var DELTA = 1;
var color = [ [100,56,200],
[255, 0, 0],
[0, 0, 255],
[0, 255, 0],
[255, 255, 255],
[0,0,0] ];
for (var i = 0; i < color.length; i++) {
colorConversionTestHelper(
function(color) {
return goog.color.rgbToHsl(color[0], color[1], color[2]);
},
function(color) {
return goog.color.hslToRgb(color[0], color[1], color[2]);
},
color[i], DELTA);
colorConversionTestHelper(
function(color) { return goog.color.rgbArrayToHsl(color); },
function(color) { return goog.color.hslArrayToRgb(color); },
color[i], DELTA);
}
}
// Tests HSV to RGB conversion
function testHSVToRGB() {
var DELTA = 1;
var color = [ [100,56,200],
[255, 0, 0],
[0, 0, 255],
[0, 255, 0],
[255, 255, 255],
[0,0,0]];
for (var i = 0; i < color.length; i++) {
colorConversionTestHelper(
function(color) {
return goog.color.rgbToHsv(color[0], color[1], color[2]);
},
function(color) {
return goog.color.hsvToRgb(color[0], color[1], color[2]);
},
color[i], DELTA);
colorConversionTestHelper(
function(color) { return goog.color.rgbArrayToHsv(color); },
function(color) { return goog.color.hsvArrayToRgb(color); },
color[i], DELTA);
}
}
// Tests that HSV space is (0-360) for hue
function testHSVSpecRangeIsCorrect() {
var color = [0,0,255]; // Blue is in the middle of hue range
var hsv = goog.color.rgbToHsv(color[0], color[1], color[2]);
assertTrue("H in HSV space looks like it's not 0-360", hsv[0] > 1);
}
// Tests conversion between HSL and Hex
function testHslToHex() {
var DELTA = 1;
var color = [ [0,0,0],
[20, 0.5, 0.5],
[0,0,1],
[255,.45,.76] ];
for (var i = 0; i < color.length; i++) {
colorConversionTestHelper(
function(hsl) { return goog.color.hslToHex(hsl[0], hsl[1], hsl[2]); },
function(hex) { return goog.color.hexToHsl(hex); },
color[i], DELTA);
colorConversionTestHelper(
function(hsl) { return goog.color.hslArrayToHex(hsl); },
function(hex) { return goog.color.hexToHsl(hex); },
color[i], DELTA);
}
}
// Tests conversion between HSV and Hex
function testHsvToHex() {
var DELTA = 1;
var color = [ [0,0,0],
[.5, 0.5, 155],
[0,0,255],
[.7,.45,21]];
for (var i = 0; i < color.length; i++) {
colorConversionTestHelper(
function(hsl) { return goog.color.hsvToHex(hsl[0], hsl[1], hsl[2]); },
function(hex) { return goog.color.hexToHsv(hex); },
color[i], DELTA);
colorConversionTestHelper(
function(hsl) { return goog.color.hsvArrayToHex(hsl); },
function(hex) { return goog.color.hexToHsv(hex); },
color[i], DELTA);
}
}
/**
* This helper method compares two RGB colors, checking that each color
* component is the same.
* @param {Array.<number>} rgb1 Color represented by a 3-element array with
* red, green, and blue values respectively, in the range [0, 255].
* @param {Array.<number>} rgb2 Color represented by a 3-element array with
* red, green, and blue values respectively, in the range [0, 255].
* @returns {boolean} True if the colors are the same, false otherwise.
*/
function rgbColorsAreEqual(rgb1, rgb2) {
return (rgb1[0] == rgb2[0] &&
rgb1[1] == rgb2[1] &&
rgb1[2] == rgb2[2]);
}
/**
* This method runs unit tests against goog.color.blend(). Test cases include:
* blending arbitrary colors with factors of 0 and 1, blending the same colors
* using arbitrary factors, blending different colors of varying factors,
* and blending colors using factors outside the expected range.
*/
function testColorBlend() {
// Define some RGB colors for our tests.
var black = [0, 0, 0];
var blue = [0, 0, 255];
var gray = [128, 128, 128];
var green = [0, 255, 0];
var purple = [128, 0, 128];
var red = [255, 0, 0];
var yellow = [255, 255, 0];
var white = [255, 255, 255];
// Blend arbitrary colors, using 0 and 1 for factors. Using 0 should return
// the first color, while using 1 should return the second color.
var redWithNoGreen = goog.color.blend(red, green, 1);
assertTrue('red + 0 * green = red',
rgbColorsAreEqual(red, redWithNoGreen));
var whiteWithAllBlue = goog.color.blend(white, blue, 0);
assertTrue('white + 1 * blue = blue',
rgbColorsAreEqual(blue, whiteWithAllBlue));
// Blend the same colors using arbitrary factors. This should return the
// same colors.
var greenWithGreen = goog.color.blend(green, green, .25);
assertTrue('green + .25 * green = green',
rgbColorsAreEqual(green, greenWithGreen));
// Blend different colors using varying factors.
var blackWithWhite = goog.color.blend(black, white, .5);
assertTrue('black + .5 * white = gray',
rgbColorsAreEqual(gray, blackWithWhite));
var redAndBlue = goog.color.blend(red, blue, .5);
assertTrue('red + .5 * blue = purple',
rgbColorsAreEqual(purple, redAndBlue));
var lightGreen = goog.color.blend(green, white, .75);
assertTrue('green + .25 * white = a lighter shade of white',
lightGreen[0] > 0 &&
lightGreen[1] == 255 &&
lightGreen[2] > 0);
// Blend arbitrary colors using factors outside the expected range.
var noGreenAllPurple = goog.color.blend(green, purple, -0.5);
assertTrue('green * -0.5 + purple = purple.',
rgbColorsAreEqual(purple, noGreenAllPurple));
var allBlueNoYellow = goog.color.blend(blue, yellow, 1.37);
assertTrue('blue * 1.37 + yellow = blue.',
rgbColorsAreEqual(blue, allBlueNoYellow));
}
/**
* This method runs unit tests against goog.color.darken(). Test cases
* include darkening black with arbitrary factors, edge cases (using 0 and 1),
* darkening colors using various factors, and darkening colors using factors
* outside the expected range.
*/
function testColorDarken() {
// Define some RGB colors
var black = [0, 0, 0];
var green = [0, 255, 0];
var darkGray = [68, 68, 68];
var olive = [128, 128, 0];
var purple = [128, 0, 128];
var white = [255, 255, 255];
// Darken black by an arbitrary factor, which should still return black.
var darkBlack = goog.color.darken(black, .63);
assertTrue('black darkened by .63 is still black.',
rgbColorsAreEqual(black, darkBlack));
// Call darken() with edge-case factors (0 and 1).
var greenNotDarkened = goog.color.darken(green, 0);
assertTrue('green darkened by 0 is still green.',
rgbColorsAreEqual(green, greenNotDarkened));
var whiteFullyDarkened = goog.color.darken(white, 1);
assertTrue('white darkened by 1 is black.',
rgbColorsAreEqual(black, whiteFullyDarkened));
// Call darken() with various colors and factors. The result should be
// a color with less luminance.
var whiteHsl = goog.color.rgbToHsl(white[0],
white[1],
white[2]);
var whiteDarkened = goog.color.darken(white, .43);
var whiteDarkenedHsl = goog.color.rgbToHsl(whiteDarkened[0],
whiteDarkened[1],
whiteDarkened[2]);
assertTrue('White that\'s darkened has less luminance than white.',
whiteDarkenedHsl[2] < whiteHsl[2]);
var purpleHsl = goog.color.rgbToHsl(purple[0],
purple[1],
purple[2]);
var purpleDarkened = goog.color.darken(purple, .1);
var purpleDarkenedHsl = goog.color.rgbToHsl(purpleDarkened[0],
purpleDarkened[1],
purpleDarkened[2]);
assertTrue('Purple that\'s darkened has less luminance than purple.',
purpleDarkenedHsl[2] < purpleHsl[2]);
// Call darken() with factors outside the expected range.
var darkGrayTurnedBlack = goog.color.darken(darkGray, 2.1);
assertTrue('Darkening dark gray by 2.1 returns black.',
rgbColorsAreEqual(black, darkGrayTurnedBlack));
var whiteNotDarkened = goog.color.darken(white, -0.62);
assertTrue('Darkening white by -0.62 returns white.',
rgbColorsAreEqual(white, whiteNotDarkened));
}
/**
* This method runs unit tests against goog.color.lighten(). Test cases
* include lightening white with arbitrary factors, edge cases (using 0 and 1),
* lightening colors using various factors, and lightening colors using factors
* outside the expected range.
*/
function testColorLighten() {
// Define some RGB colors
var black = [0, 0, 0];
var brown = [165, 42, 42];
var navy = [0, 0, 128];
var orange = [255, 165, 0];
var white = [255, 255, 255];
// Lighten white by an arbitrary factor, which should still return white.
var lightWhite = goog.color.lighten(white, .41);
assertTrue('white lightened by .41 is still white.',
rgbColorsAreEqual(white, lightWhite));
// Call lighten() with edge-case factors(0 and 1).
var navyNotLightened = goog.color.lighten(navy, 0);
assertTrue('navy lightened by 0 is still navy.',
rgbColorsAreEqual(navy, navyNotLightened));
var orangeFullyLightened = goog.color.lighten(orange, 1);
assertTrue('orange lightened by 1 is white.',
rgbColorsAreEqual(white, orangeFullyLightened));
// Call lighten() with various colors and factors. The result should be
// a color with greater luminance.
var blackHsl = goog.color.rgbToHsl(black[0],
black[1],
black[2]);
var blackLightened = goog.color.lighten(black, .33);
var blackLightenedHsl = goog.color.rgbToHsl(blackLightened[0],
blackLightened[1],
blackLightened[2]);
assertTrue('Black that\'s lightened has more luminance than black.',
blackLightenedHsl[2] >= blackHsl[2]);
var orangeHsl = goog.color.rgbToHsl(orange[0],
orange[1],
orange[2]);
var orangeLightened = goog.color.lighten(orange, .91);
var orangeLightenedHsl = goog.color.rgbToHsl(orangeLightened[0],
orangeLightened[1],
orangeLightened[2]);
assertTrue('Orange that\'s lightened has more luminance than orange.',
orangeLightenedHsl[2] >= orangeHsl[2]);
// Call lighten() with factors outside the expected range.
var navyTurnedWhite = goog.color.lighten(navy, 1.01);
assertTrue('Lightening navy by 1.01 returns white.',
rgbColorsAreEqual(white, navyTurnedWhite));
var brownNotLightened = goog.color.lighten(brown, -0.0000001);
assertTrue('Lightening brown by -0.0000001 returns brown.',
rgbColorsAreEqual(brown, brownNotLightened));
}
/**
* This method runs unit tests against goog.color.hslDistance().
*/
function testHslDistance() {
// Define some HSL colors
var aliceBlueHsl = goog.color.rgbToHsl(240, 248, 255);
var blackHsl = goog.color.rgbToHsl(0, 0, 0);
var ghostWhiteHsl = goog.color.rgbToHsl(248, 248, 255);
var navyHsl = goog.color.rgbToHsl(0, 0, 128);
var redHsl = goog.color.rgbToHsl(255, 0, 0);
var whiteHsl = goog.color.rgbToHsl(255, 255, 255);
// The distance between the same colors should be 0.
assertTrue('There is no HSL distance between white and white.',
goog.color.hslDistance(whiteHsl, whiteHsl) == 0);
assertTrue('There is no HSL distance between red and red.',
goog.color.hslDistance(redHsl, redHsl) == 0);
// The distance between various colors should be within certain thresholds.
var hslDistance = goog.color.hslDistance(whiteHsl, ghostWhiteHsl);
assertTrue('The HSL distance between white and ghost white is > 0.',
hslDistance > 0);
assertTrue('The HSL distance between white and ghost white is <= 0.02.',
hslDistance <= 0.02);
hslDistance = goog.color.hslDistance(whiteHsl, redHsl);
assertTrue('The HSL distance betwen white and red is > 0.02.',
hslDistance > 0.02);
hslDistance = goog.color.hslDistance(navyHsl, aliceBlueHsl);
assertTrue('The HSL distance between navy and alice blue is > 0.02.',
hslDistance > 0.02);
hslDistance = goog.color.hslDistance(blackHsl, whiteHsl);
assertTrue('The HSL distance between white and black is 1.',
hslDistance == 1);
}
/**
* This method runs unit tests against goog.color.yiqBrightness_().
*/
function testYiqBrightness() {
var white = [255, 255, 255];
var black = [0, 0, 0];
var coral = [255, 127, 80];
var lightgreen = [144, 238, 144];
var whiteBrightness = goog.color.yiqBrightness_(white);
var blackBrightness = goog.color.yiqBrightness_(black);
var coralBrightness = goog.color.yiqBrightness_(coral);
var lightgreenBrightness = goog.color.yiqBrightness_(lightgreen);
// brightness should be a number
assertTrue('White brightness is a number.',
typeof whiteBrightness == 'number');
assertTrue('Coral brightness is a number.',
typeof coralBrightness == 'number');
// brightness for known colors should match known values
assertEquals('White brightness is 255', whiteBrightness, 255);
assertEquals('Black brightness is 0', blackBrightness, 0);
assertEquals('Coral brightness is 160', coralBrightness, 160);
assertEquals('Lightgreen brightness is 199', lightgreenBrightness, 199);
}
/**
* This method runs unit tests against goog.color.yiqBrightnessDiff_().
*/
function testYiqBrightnessDiff() {
var colors = {
'deeppink': [255, 20, 147],
'indigo': [75, 0, 130],
'saddlebrown': [139, 69, 19]
}
var diffs = new Object();
for(name1 in colors) {
for(name2 in colors) {
diffs[name1 + '-' + name2] =
goog.color.yiqBrightnessDiff_(colors[name1],colors[name2]);
}
}
for(pair in diffs) {
// each brightness diff should be a number
assertTrue(pair + ' diff is a number.', typeof diffs[pair] == 'number');
// each brightness diff should be greater than or equal to 0
assertTrue(pair + ' diff is greater than or equal to 0.', diffs[pair] >= 0);
}
// brightness diff for same-color pairs should be 0
assertEquals('deeppink-deeppink is 0.', diffs['deeppink-deeppink'], 0);
assertEquals('indigo-indigo is 0.', diffs['indigo-indigo'], 0);
// brightness diff for known pairs should match known values
assertEquals('deeppink-indigo is 68.', diffs['deeppink-indigo'], 68);
assertEquals('saddlebrown-deeppink is 21.',
diffs['saddlebrown-deeppink'], 21);
// reversed pairs should have equal values
assertEquals('indigo-saddlebrown is 47.', diffs['indigo-saddlebrown'], 47);
assertEquals('saddlebrown-indigo is also 47.',
diffs['saddlebrown-indigo'], 47);
}
/**
* This method runs unit tests against goog.color.colorDiff_().
*/
function testColorDiff() {
var colors = {
'mediumblue': [0, 0, 205],
'oldlace': [253, 245, 230],
'orchid': [218, 112, 214]
}
var diffs = new Object();
for(name1 in colors) {
for(name2 in colors) {
diffs[name1 + '-' + name2] =
goog.color.colorDiff_(colors[name1], colors[name2]);
}
}
for(pair in diffs) {
// each color diff should be a number
assertTrue(pair + ' diff is a number.', typeof diffs[pair] == 'number');
// each color diff should be greater than or equal to 0
assertTrue(pair + ' diff is greater than or equal to 0.', diffs[pair] >= 0);
}
// color diff for same-color pairs should be 0
assertEquals('mediumblue-mediumblue is 0.',
diffs['mediumblue-mediumblue'], 0);
assertEquals('oldlace-oldlace is 0.', diffs['oldlace-oldlace'], 0);
// color diff for known pairs should match known values
assertEquals('mediumblue-oldlace is 523.', diffs['mediumblue-oldlace'], 523);
assertEquals('oldlace-orchid is 184.', diffs['oldlace-orchid'], 184);
// reversed pairs should have equal values
assertEquals('orchid-mediumblue is 339.', diffs['orchid-mediumblue'], 339);
assertEquals('mediumblue-orchid is also 339.',
diffs['mediumblue-orchid'], 339);
}
/**
* This method runs unit tests against goog.color.highContrast().
*/
function testHighContrast() {
white = [255, 255, 255];
black = [0, 0, 0];
lemonchiffron = [255, 250, 205];
sienna = [160, 82, 45];
var suggestion = goog.color.highContrast(
black, [white, black, sienna, lemonchiffron]);
// should return an array of three numbers
assertTrue('Return value is an array.', typeof suggestion == 'object');
assertTrue('Return value is 3 long.', suggestion.length == 3);
// known color combos should return a known (i.e. human-verified) suggestion
assertArrayEquals('White is best on sienna.',
goog.color.highContrast(
sienna, [white, black, sienna, lemonchiffron]), white);
assertArrayEquals('Black is best on lemonchiffron.',
goog.color.highContrast(
white, [white, black, sienna, lemonchiffron]), black);
}
/**
* Helper function for color conversion functions between two colorspaces.
* @param {Function} funcOne Function that converts from 1st colorspace to 2nd
* @param {Function} funcTwo Function that converts from 2nd colorspace to 2nd
* @param {Array.<number>} color The color array passed to funcOne
* @param {number} DELTA Margin of error for each element in color
*/
function colorConversionTestHelper(funcOne, funcTwo, color, DELTA) {
var temp = funcOne(color);
if (!goog.color.isValidHexColor_(temp)) {
assertTrue("First conversion had a NaN: " + temp, !isNaN(temp[0]));
assertTrue("First conversion had a NaN: " + temp, !isNaN(temp[1]));
assertTrue("First conversion had a NaN: " + temp, !isNaN(temp[2]));
}
var back = funcTwo(temp);
if (!goog.color.isValidHexColor_(temp)) {
assertTrue("Second conversion had a NaN: " + back, !isNaN(back[0]));
assertTrue("Second conversion had a NaN: " + back, !isNaN(back[1]));
assertTrue("Second conversion had a NaN: " + back, !isNaN(back[2]));
}
assertColorFuzzyEquals("Color was off", color, back, DELTA);
}
/**
* Checks equivalence between two colors' respective values. Accepts +- delta
* for each pair of values
* @param {string} Str
* @param {Array.<number>} expected
* @param {Array.<number>} actual
* @param {number} delta Margin of error for each element in color array
*/
function assertColorFuzzyEquals(str, expected, actual, delta) {
assertTrue(str + " Expected: " + expected + " and got: " + actual +
" w/ delta: " + delta,
(Math.abs(expected[0] - actual[0]) <= delta) &&
(Math.abs(expected[1] - actual[1]) <= delta) &&
(Math.abs(expected[2] - actual[2]) <= delta));
}
</script>
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