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test(tui): integrated StressRenderScheduler into issue-1962 reproduction test

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- Integrated StressRenderScheduler into the issue #1962 test suite to control and drain render schedules deterministically.
- Updated the settle helper and TUI initialization to accept and use the mock scheduler instead of arbitrary timeouts.
This commit is contained in:
can1357
2026-07-01 00:09:16 +02:00
parent 8687899728
commit 87379c2651
1 changed files with 13 additions and 11 deletions
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packages/tui/test/issue-1962-repro.test.ts
+13 -11
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@@ -1,5 +1,6 @@
import { afterEach, describe, expect, it, vi } from "bun:test";
import { type Component, type Focusable, TUI } from "@oh-my-pi/pi-tui";
import { StressRenderScheduler } from "./render-stress-scheduler";
import { VirtualTerminal } from "./virtual-terminal";
class MutableLinesComponent implements Component {
@@ -38,12 +39,11 @@ class ArrowSelectorComponent implements Component, Focusable {
const ERASE_SCROLLBACK = /\x1b\[3J/g;
async function settle(term: VirtualTerminal): Promise<void> {
async function settle(term: VirtualTerminal, scheduler: StressRenderScheduler): Promise<void> {
const nextTick = Promise.withResolvers<void>();
process.nextTick(nextTick.resolve);
await nextTick.promise;
await Bun.sleep(40);
await term.flush();
await scheduler.drain(term);
}
function captureWrites(term: VirtualTerminal): string[] {
@@ -62,8 +62,9 @@ describe("issue #1962: arrow navigation after dirty scrollback", () => {
});
it("does not clear and replay the whole transcript for a focused arrow-key frame", async () => {
const scheduler = new StressRenderScheduler();
const term = new VirtualTerminal(40, 6);
const tui = new TUI(term);
const tui = new TUI(term, undefined, { renderScheduler: scheduler });
const transcript = new MutableLinesComponent(Array.from({ length: 12 }, (_value, index) => `history-${index}`));
const selector = new ArrowSelectorComponent();
tui.addChild(transcript);
@@ -72,18 +73,18 @@ describe("issue #1962: arrow navigation after dirty scrollback", () => {
try {
tui.start();
await settle(term);
await settle(term, scheduler);
transcript.setLines([
"history-0 updated",
...Array.from({ length: 11 }, (_value, index) => `history-${index + 1}`),
]);
tui.requestRender();
await settle(term);
await settle(term, scheduler);
const writes = captureWrites(term);
term.sendInput("\x1b[B");
await settle(term);
await settle(term, scheduler);
const output = writes.join("");
expect(output.match(ERASE_SCROLLBACK) ?? []).toHaveLength(0);
@@ -102,8 +103,9 @@ describe("issue #1962: arrow navigation after dirty scrollback", () => {
});
it("does not clear and replay the whole transcript for a focused arrow-key frame inside an overlay", async () => {
const scheduler = new StressRenderScheduler();
const term = new VirtualTerminal(40, 6);
const tui = new TUI(term);
const tui = new TUI(term, undefined, { renderScheduler: scheduler });
const transcript = new MutableLinesComponent(Array.from({ length: 12 }, (_value, index) => `history-${index}`));
tui.addChild(transcript);
const selector = new ArrowSelectorComponent();
@@ -111,18 +113,18 @@ describe("issue #1962: arrow navigation after dirty scrollback", () => {
try {
tui.start();
await settle(term);
await settle(term, scheduler);
transcript.setLines([
"history-0 updated",
...Array.from({ length: 11 }, (_value, index) => `history-${index + 1}`),
]);
tui.requestRender();
await settle(term);
await settle(term, scheduler);
const writes = captureWrites(term);
term.sendInput("\x1b[B");
await settle(term);
await settle(term, scheduler);
const output = writes.join("");
expect(output.match(ERASE_SCROLLBACK) ?? []).toHaveLength(0);