刘宇飞
6e0a1fbcbb
Includes scratch-gui, scratch-vm, scratch-blocks, scratch-render, scratch-l10n, and deployment config. Co-authored-by: Cursor <cursoragent@cursor.com>
49 lines
2.0 KiB
JavaScript
49 lines
2.0 KiB
JavaScript
const {test, Test} = require('tap');
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const {rgbToHsv, hsvToRgb} = require('../../src/util/color-conversions');
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Test.prototype.addAssert('colorsAlmostEqual', 2, function (found, wanted, message, extra) {
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/* eslint-disable no-invalid-this */
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message += `: found ${JSON.stringify(Array.from(found))}, wanted ${JSON.stringify(Array.from(wanted))}`;
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// should always return another assert call, or
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// this.pass(message) or this.fail(message, extra)
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if (found.length !== wanted.length) {
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return this.fail(message, extra);
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}
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for (let i = 0; i < found.length; i++) {
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// smallest meaningful difference--detects changes in hue value after rounding
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if (Math.abs(found[i] - wanted[i]) >= 0.5 / 360) {
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return this.fail(message, extra);
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}
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}
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return this.pass(message);
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/* eslint-enable no-invalid-this */
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});
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test('RGB to HSV', t => {
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const dst = [0, 0, 0];
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t.colorsAlmostEqual(rgbToHsv([255, 255, 255], dst), [0, 0, 1], 'white');
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t.colorsAlmostEqual(rgbToHsv([0, 0, 0], dst), [0, 0, 0], 'black');
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t.colorsAlmostEqual(rgbToHsv([127, 127, 127], dst), [0, 0, 0.498], 'grey');
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t.colorsAlmostEqual(rgbToHsv([255, 255, 0], dst), [0.167, 1, 1], 'yellow');
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t.colorsAlmostEqual(rgbToHsv([1, 0, 0], dst), [0, 1, 0.00392], 'dark red');
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t.end();
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});
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test('HSV to RGB', t => {
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const dst = new Uint8ClampedArray(3);
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t.colorsAlmostEqual(hsvToRgb([0, 1, 1], dst), [255, 0, 0], 'red');
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t.colorsAlmostEqual(hsvToRgb([1, 1, 1], dst), [255, 0, 0], 'red (hue of 1)');
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t.colorsAlmostEqual(hsvToRgb([0.5, 1, 1], dst), [0, 255, 255], 'cyan');
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t.colorsAlmostEqual(hsvToRgb([1.5, 1, 1], dst), [0, 255, 255], 'cyan (hue of 1.5)');
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t.colorsAlmostEqual(hsvToRgb([0, 0, 0], dst), [0, 0, 0], 'black');
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t.colorsAlmostEqual(hsvToRgb([0.5, 1, 0], dst), [0, 0, 0], 'black (with hue and saturation)');
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t.colorsAlmostEqual(hsvToRgb([0, 1, 0.00392], dst), [1, 0, 0], 'dark red');
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t.end();
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});
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