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[READ-ONLY] Mirror of https://github.com/lukebennett88/luke-ui. luke-ui.pages.dev
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TypeScript
at main
123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188189190191192193194195196197198199200201202203204205206207208209210211212213214215216217218219220221222223224225226227228229230231232233234235236237238239240241import { tmpdir } from 'node:os';import path from 'node:path';import { access, mkdir, mkdtemp, writeFile } from 'node:fs/promises';import { PNG } from 'pngjs';import { expect, test } from 'vite-plus/test';import { formatVisualCaptureName, formatVisualViewport,} from '../src/core/test-utils/visual-capture-id.js';import { assertCapturesPainted, compareCaptures, countResults } from './visual-regression-lib.js';
const png = (red: number) => { const image = new PNG({ height: 1, width: 1 }); image.data.set([red, 0, 0, 255]); return PNG.sync.write(image);};
const pngWithAAStroke = (width: number, height: number, x: number, withStroke: boolean) => { const image = new PNG({ height, width }); image.data.fill(255); if (withStroke) { for (let y = 10; y < height - 10; y++) { for (const [offset, value] of [ [-1, 220], [0, 180], [1, 220], ] as const) { image.data.set([value, value, value, 255], (y * width + (x + offset)) * 4); } } } return PNG.sync.write(image);};
const pngWithBand = ( width: number, height: number, fillColor: [number, number, number, number], bandColor: [number, number, number, number],) => { const image = new PNG({ height, width }); const bandHeight = Math.max(1, Math.round(height / 10)); const bandStart = height - bandHeight; for (let y = 0; y < height; y++) { for (let x = 0; x < width; x++) { const index = (y * width + x) * 4; const color = y >= bandStart ? bandColor : fillColor; image.data.set(color, index); } } return PNG.sync.write(image);};
async function captureDirs(prefix: string) { const root = await mkdtemp(path.join(tmpdir(), prefix)); const expected = path.join(root, 'expected'); const actual = path.join(root, 'actual'); await Promise.all([expected, actual].map((directory) => mkdir(directory))); return { actual, expected, output: path.join(root, 'output') };}
test('records the full viewport token produced by the capture-name helper', async () => { const { actual, expected, output } = await captureDirs('visual-viewport-'); const relativeFile = `${formatVisualCaptureName('button/sink', formatVisualViewport(1024, 800))}.png`; await Promise.all( [expected, actual].map((directory) => mkdir(path.join(directory, path.dirname(relativeFile)), { recursive: true }), ), ); await Promise.all([ writeFile(path.join(expected, relativeFile), png(0)), writeFile(path.join(actual, relativeFile), png(0)), ]);
const [result] = await compareCaptures(expected, actual, output);
expect(result).toMatchObject({ actualViewport: '1024x800', expectedViewport: '1024x800', id: 'button/sink', status: 'unchanged', });});
test('classifies matched, changed, added, and removed captures', async () => { const { actual, expected, output } = await captureDirs('visual-regression-'); await Promise.all([ writeFile(path.join(expected, 'same.png'), png(0)), writeFile(path.join(actual, 'same.png'), png(0)), writeFile(path.join(expected, 'changed.png'), png(0)), writeFile(path.join(actual, 'changed.png'), png(255)), writeFile(path.join(expected, 'removed.png'), png(0)), writeFile(path.join(actual, 'added.png'), png(0)), ]);
const results = await compareCaptures(expected, actual, output);
expect(Object.fromEntries(results.map(({ id, status }) => [id, status]))).toEqual({ added: 'added', changed: 'changed', removed: 'removed', same: 'unchanged', }); expect(countResults(results)).toEqual({ added: 1, changed: 1, removed: 1, unchanged: 1 });});
test('writes expected, actual, and diff PNGs for everything needing review', async () => { const { actual, expected, output } = await captureDirs('visual-outputs-'); await Promise.all([ writeFile(path.join(expected, 'same.png'), png(0)), writeFile(path.join(actual, 'same.png'), png(0)), writeFile(path.join(expected, 'changed.png'), png(0)), writeFile(path.join(actual, 'changed.png'), png(255)), writeFile(path.join(expected, 'removed.png'), png(0)), writeFile(path.join(actual, 'added.png'), png(0)), ]);
await compareCaptures(expected, actual, output);
await expect(access(path.join(output, 'changed.expected.png'))).resolves.toBeUndefined(); await expect(access(path.join(output, 'changed.actual.png'))).resolves.toBeUndefined(); await expect(access(path.join(output, 'changed.diff.png'))).resolves.toBeUndefined(); await expect(access(path.join(output, 'added.actual.png'))).resolves.toBeUndefined(); await expect(access(path.join(output, 'removed.expected.png'))).resolves.toBeUndefined(); await expect(access(path.join(output, 'same.actual.png'))).rejects.toThrow(/ENOENT/);});
test('counts anti-aliased pixels and flags a removed thin stroke as a change', async () => { const { actual, expected, output } = await captureDirs('visual-regression-aa-'); const width = 40; const height = 40; await Promise.all([ writeFile(path.join(expected, 'stroke.png'), pngWithAAStroke(width, height, 20, true)), writeFile(path.join(actual, 'stroke.png'), pngWithAAStroke(width, height, 20, false)), ]);
const [result] = await compareCaptures(expected, actual, output);
// `includeAA: true` counts the blended edge columns too, not just the solid centre. expect(result?.mismatchedPixels).toBe(60); expect(result?.status).toBe('changed');});
test('reports a 16px icon on a large canvas as changed (#312)', async () => { const { actual, expected, output } = await captureDirs('visual-regression-icon-'); const width = 1024; const height = 800; const withIcon = new PNG({ height, width }); withIcon.data.fill(255); for (let y = 0; y < 16; y++) { for (let x = 0; x < 16; x++) { withIcon.data.set([17, 17, 17, 255], ((y + 40) * width + (x + 40)) * 4); } } const blank = new PNG({ height, width }); blank.data.fill(255); await Promise.all([ writeFile(path.join(expected, 'icon.png'), PNG.sync.write(withIcon)), writeFile(path.join(actual, 'icon.png'), PNG.sync.write(blank)), ]);
const [result] = await compareCaptures(expected, actual, output);
expect(result?.mismatchedPixels).toBe(256); expect(result?.status).toBe('changed');});
test('reports a single changed pixel as changed', async () => { const { actual, expected, output } = await captureDirs('visual-regression-pixel-'); const width = 200; const height = 200; const blank = new PNG({ height, width }); blank.data.fill(255); const speck = new PNG({ height, width }); speck.data.fill(255); speck.data.set([0, 0, 0, 255], (100 * width + 100) * 4); await Promise.all([ writeFile(path.join(expected, 'speck.png'), PNG.sync.write(blank)), writeFile(path.join(actual, 'speck.png'), PNG.sync.write(speck)), ]);
const [result] = await compareCaptures(expected, actual, output);
expect(result?.mismatchedPixels).toBe(1); expect(result?.status).toBe('changed');});
test('rejects a tall capture whose bottom decile never painted', async () => { const root = await mkdtemp(path.join(tmpdir(), 'visual-painted-')); const captureName = formatVisualCaptureName('tall', formatVisualViewport(1024, 800)); await writeFile( path.join(root, `${captureName}.png`), pngWithBand(1024, 900, [0, 0, 0, 255], [10, 10, 10, 255]), );
await expect(assertCapturesPainted(root)).rejects.toThrow(/#310.*tall \(1024x900\)/s);});
test('accepts a tall capture whose bottom decile painted', async () => { const root = await mkdtemp(path.join(tmpdir(), 'visual-painted-')); const width = 1024; const height = 900; const image = new PNG({ height, width }); const bandHeight = Math.max(1, Math.round(height / 10)); const bandStart = height - bandHeight; for (let y = 0; y < height; y++) { for (let x = 0; x < width; x++) { const index = (y * width + x) * 4; const color: [number, number, number, number] = y >= bandStart && x % 2 === 0 ? [200, 200, 200, 255] : [0, 0, 0, 255]; image.data.set(color, index); } } await writeFile( path.join(root, `${formatVisualCaptureName('tall', formatVisualViewport(1024, 800))}.png`), PNG.sync.write(image), );
await expect(assertCapturesPainted(root)).resolves.toBeUndefined();});
test('ignores a capture that fits its viewport even with a uniform bottom decile', async () => { const root = await mkdtemp(path.join(tmpdir(), 'visual-painted-')); await writeFile( path.join(root, `${formatVisualCaptureName('fits', formatVisualViewport(1024, 800))}.png`), pngWithBand(1024, 720, [0, 0, 0, 255], [0, 0, 0, 255]), );
await expect(assertCapturesPainted(root)).resolves.toBeUndefined();});
test('ignores a capture with no recorded viewport', async () => { const root = await mkdtemp(path.join(tmpdir(), 'visual-painted-')); await writeFile( path.join(root, 'legacy.png'), pngWithBand(4, 40, [0, 0, 0, 255], [0, 0, 0, 255]), );
await expect(assertCapturesPainted(root)).resolves.toBeUndefined();});