46 lines
2.2 KiB
TypeScript
46 lines
2.2 KiB
TypeScript
/**
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* Copyright (c) 2025 The xterm.js authors. All rights reserved.
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* @license MIT
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* EXPERIMENT: try to reproduce vscode#322756 garbled single-terminal render.
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*/
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import test, { expect } from '@playwright/test';
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import { ITestContext, createTestContext, openTerminal } from '../../../test/playwright/TestUtils';
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import { captureRowSignatures, expectSignatureMatches, getAtlasPageCount, loadWebglStrict, setMaxAtlasPages, waitForRender, writeAndWaitForRender } from '../../../test/playwright/RendererTestUtils';
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import { generateColoredAsciiFlood } from '../../../test/playwright/SyntheticTui';
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let ctx: ITestContext;
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test.beforeAll(async ({ browser }) => { ctx = await createTestContext(browser); });
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test.afterAll(async () => await ctx.page.close());
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test.describe('repro #322756', () => {
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test.skip(({ browserName }) => browserName !== 'chromium');
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test.describe.configure({ timeout: 60000 });
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test('header survives merge race with per-chunk sync', async () => {
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await openTerminal(ctx, { cols: 80, rows: 24 });
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await loadWebglStrict(ctx);
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await setMaxAtlasPages(ctx, 4);
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const cols = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10];
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// Alt-buffer TUI: pinned header on row 1, body churns below (like Copilot CLI).
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await writeAndWaitForRender(ctx, '\x1b[?1049h\x1b[H HEADER_REF_0123456789');
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const ref = await captureRowSignatures(ctx, 1, cols);
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let maxDiff = 0;
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for (let c = 0; c < 30; c++) {
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// redraw header + churn body rows 2..24 with unique glyphs, header stays put
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let frame = '\x1b[2;1H';
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frame += generateColoredAsciiFlood(23 * 78, c * 23 * 78);
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await writeAndWaitForRender(ctx, frame);
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const now = await captureRowSignatures(ctx, 1, cols); // forces GPU sync
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for (let i = 0; i < cols.length; i++) {
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const d = Math.max(...ref[i].map((v, k) => Math.abs(v - now[i][k])));
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maxDiff = Math.max(maxDiff, d);
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}
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}
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console.error('[repro] pages=', await getAtlasPageCount(ctx), 'headerMaxDiff=', maxDiff);
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const after = await captureRowSignatures(ctx, 1, cols);
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for (let i = 0; i < cols.length; i++) {
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expectSignatureMatches(after[i], ref[i], 14, `header col ${cols[i]} garbled`);
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}
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});
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});
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