97 lines
3.5 KiB
TypeScript
97 lines
3.5 KiB
TypeScript
import { test, expect } from "./fixtures";
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import { TerminalE2EHarness, withTerminalInApp } from "./helpers/terminal-dsl";
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import {
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installTerminalRenderProbe,
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readTerminalRenderProbe,
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resetTerminalRenderProbe,
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startTerminalFrameSampling,
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summarizeTerminalRenderProbe,
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terminalVisibleText,
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} from "./helpers/terminal-probes";
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import { waitForTerminalContent } from "./helpers/terminal-perf";
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test.describe("Terminal alternate-screen transitions", () => {
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let harness: TerminalE2EHarness;
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test.beforeAll(async () => {
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harness = await TerminalE2EHarness.create({ tempPrefix: "terminal-alt-" });
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});
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test.afterAll(async () => {
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await harness?.cleanup();
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});
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test("restores the normal screen after full-screen alternate buffer exit without remounting", async ({
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page,
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}, testInfo) => {
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test.setTimeout(60_000);
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await installTerminalRenderProbe(page);
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await withTerminalInApp(page, harness, { name: "alternate-screen" }, async () => {
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await harness.setupPrompt(page);
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const terminal = harness.terminalSurface(page);
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const historyReady = `HISTORY_READY_${Date.now()}`;
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await terminal.pressSequentially(
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`for i in $(seq 1 80); do echo HISTORY_$i; done; echo ${historyReady}\n`,
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{ delay: 0 },
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);
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await waitForTerminalContent(page, (text) => text.includes(historyReady), 10_000);
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await resetTerminalRenderProbe(page);
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await page.waitForTimeout(500);
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const settledProbe = await readTerminalRenderProbe(page);
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expect(settledProbe.resetWrites, "terminal should be idle before alternate-screen act").toBe(
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0,
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);
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await resetTerminalRenderProbe(page);
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const afterAlt = `AFTER_ALT_${Date.now()}`;
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await startTerminalFrameSampling(page);
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await terminal.pressSequentially(
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`printf '\\033[?1049h\\033[2J\\033[HALT_SCREEN_TOP\\n'; sleep 0.25; printf '\\033[?1049l'; echo ${afterAlt}\n`,
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{ delay: 0 },
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);
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await waitForTerminalContent(page, (text) => text.includes(afterAlt), 10_000);
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await page.waitForTimeout(250);
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const probe = await readTerminalRenderProbe(page);
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const probeSummary = summarizeTerminalRenderProbe(probe);
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await testInfo.attach("alternate-screen-probe", {
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body: JSON.stringify({ summary: probeSummary, probe }, null, 2),
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contentType: "application/json",
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});
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expect(probe.setCount, "terminal instance should not be replaced after attach").toBe(0);
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expect(probe.unsetCount, "terminal instance should not be unset after attach").toBe(0);
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expect(
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probe.altEnterWrites,
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"test command should enter the alternate screen",
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).toBeGreaterThan(0);
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expect(probe.altExitWrites, "test command should exit the alternate screen").toBeGreaterThan(
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0,
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);
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expect(probe.resetWrites, "alternate-screen exit should not replay a snapshot reset").toBe(0);
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const finalText = await terminalVisibleText(page);
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expect(finalText).toContain(historyReady);
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expect(finalText).toContain(afterAlt);
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const suspiciousFrames = probe.frames.filter(
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(frame) =>
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frame.text.includes("$") &&
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!frame.text.includes(historyReady) &&
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!frame.text.includes(afterAlt) &&
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frame.nonEmptyRows <= 2 &&
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(frame.firstNonEmptyRow ?? Number.POSITIVE_INFINITY) <= 1,
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);
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expect(
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suspiciousFrames,
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"normal-screen restore should not flash to a mostly blank prompt-at-top frame",
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).toEqual([]);
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});
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});
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});
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