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Add unit tests for new color-related functionality

Browse source 
Also, fix a math error in `Color.rgbToHsv`.

Newly covered functions:
- `toRbgColorObject` from `util/cast.js`
- `hsvToRgb` from `util/colors.js`
- `rgbToHsv` from `util/colors.js`
- `mixRgb` from `util/colors.js`
This commit is contained in:
Christopher Willis-Ford 2017-01-19 15:19:06 -08:00
parent a6190da774
commit d0845728ee
3 changed files with 100 additions and 11 deletions
test/unit
util_color.js

73
test/unit/util_color.js
View file

@ -1,6 +1,43 @@
var test = require('tap').test;
var tap = require('tap');
var test = tap.test;
var color = require('../../src/util/color');
/**
* Assert that two HSV colors are similar to each other, within a tolerance.
* @param {Test} t - the Tap test object.
* @param {HSVObject} actual - the first HSV color to compare.
* @param {HSVObject} expected - the other HSV color to compare.
*/
var hsvSimilar = function (t, actual, expected) {
if ((Math.abs(actual.h - expected.h) >= 1) ||
(Math.abs(actual.s - expected.s) >= 0.01) ||
(Math.abs(actual.v - expected.v) >= 0.01)
) {
t.fail('HSV colors not similar enough', {
actual: actual,
expected: expected
});
}
};
/**
* Assert that two RGB colors are similar to each other, within a tolerance.
* @param {Test} t - the Tap test object.
* @param {RGBObject} actual - the first RGB color to compare.
* @param {RGBObject} expected - the other RGB color to compare.
*/
var rgbSimilar = function (t, actual, expected) {
if ((Math.abs(actual.r - expected.r) >= 1) ||
(Math.abs(actual.g - expected.g) >= 1) ||
(Math.abs(actual.b - expected.b) >= 1)
) {
t.fail('RGB colors not similar enough', {
actual: actual,
expected: expected
});
}
};
test('decimalToHex', function (t) {
t.strictEqual(color.decimalToHex(0), '#000000');
t.strictEqual(color.decimalToHex(1), '#000001');
@ -60,3 +97,37 @@ test('hexToDecimal', function (t) {
t.strictEqual(color.hexToDecimal('#00ffaa'), 65450);
t.end();
});
test('hsvToRgb', function (t) {
rgbSimilar(t, color.hsvToRgb({h: 0, s: 0, v: 0}), {r: 0, g: 0, b: 0});
rgbSimilar(t, color.hsvToRgb({h: 123, s: 0.1234, v: 0}), {r: 0, g: 0, b: 0});
rgbSimilar(t, color.hsvToRgb({h: 0, s: 0, v: 1}), {r: 255, g: 255, b: 255});
rgbSimilar(t, color.hsvToRgb({h: 321, s: 0, v: 1}), {r: 255, g: 255, b: 255});
rgbSimilar(t, color.hsvToRgb({h: 0, s: 1, v: 1}), {r: 255, g: 0, b: 0});
rgbSimilar(t, color.hsvToRgb({h: 120, s: 1, v: 1}), {r: 0, g: 255, b: 0});
rgbSimilar(t, color.hsvToRgb({h: 240, s: 1, v: 1}), {r: 0, g: 0, b: 255});
t.end();
});
test('rgbToHsv', function (t) {
hsvSimilar(t, color.rgbToHsv({r: 0, g: 0, b: 0}), {h: 0, s: 0, v: 0});
hsvSimilar(t, color.rgbToHsv({r: 64, g: 64, b: 64}), {h: 0, s: 0, v: 0.25});
hsvSimilar(t, color.rgbToHsv({r: 128, g: 128, b: 128}), {h: 0, s: 0, v: 0.5});
hsvSimilar(t, color.rgbToHsv({r: 192, g: 192, b: 192}), {h: 0, s: 0, v: 0.75});
hsvSimilar(t, color.rgbToHsv({r: 255, g: 255, b: 255}), {h: 0, s: 0, v: 1});
hsvSimilar(t, color.rgbToHsv({r: 255, g: 0, b: 0}), {h: 0, s: 1, v: 1});
hsvSimilar(t, color.rgbToHsv({r: 0, g: 255, b: 0}), {h: 120, s: 1, v: 1});
hsvSimilar(t, color.rgbToHsv({r: 0, g: 0, b: 255}), {h: 240, s: 1, v: 1});
t.end();
});
test('mixRgb', function (t) {
rgbSimilar(t, color.mixRgb({r: 10, g: 20, b: 30}, {r: 30, g: 40, b: 50}, -1), {r: 10, g: 20, b: 30});
rgbSimilar(t, color.mixRgb({r: 10, g: 20, b: 30}, {r: 30, g: 40, b: 50}, 0), {r: 10, g: 20, b: 30});
rgbSimilar(t, color.mixRgb({r: 10, g: 20, b: 30}, {r: 30, g: 40, b: 50}, 0.25), {r: 15, g: 25, b: 35});
rgbSimilar(t, color.mixRgb({r: 10, g: 20, b: 30}, {r: 30, g: 40, b: 50}, 0.5), {r: 20, g: 30, b: 40});
rgbSimilar(t, color.mixRgb({r: 10, g: 20, b: 30}, {r: 30, g: 40, b: 50}, 0.75), {r: 25, g: 35, b: 45});
rgbSimilar(t, color.mixRgb({r: 10, g: 20, b: 30}, {r: 30, g: 40, b: 50}, 1), {r: 30, g: 40, b: 50});
rgbSimilar(t, color.mixRgb({r: 10, g: 20, b: 30}, {r: 30, g: 40, b: 50}, 2), {r: 30, g: 40, b: 50});
t.end();
});