freezmo/tests/review-test.mjs

/**
 * Smart Review behaviour: the loading feedback (a stalled first request must
 * never look like a dead tap), the session end-to-end, and the health-probe
 * cache.
 */
import { BASE, DECK, dueSrs, launchBrowser, makeChecker, makePage, seed, seedLearning, wrongAnswer } from "./lib.mjs";

const { check, finish } = makeChecker();
const browser = await launchBrowser();

async function makeReviewPage(locale = "en") {
  const { context, page } = await makePage(browser);
  await seed(page, { locale, decks: [DECK] });
  await page.goto(BASE, { waitUntil: "networkidle" });
  await page.waitForTimeout(800);
  await seedLearning(page, { answers: [wrongAnswer()], srs: [dueSrs()] });
  await page.reload({ waitUntil: "networkidle" });
  await page.waitForTimeout(900);
  return { context, page };
}

/* 1. stalled navigation: loading screen appears at once ------------- */
{
  const context = await browser.newContext({ viewport: { width: 390, height: 844 }, deviceScaleFactor: 2 });
  let release;
  const gate = new Promise((resolve) => {
    release = resolve;
  });
  let stalled = 0;
  await context.route("**/review*", async (route) => {
    stalled += 1;
    await gate;
    await route.continue().catch(() => {});
  });
  const page = await context.newPage();
  await seed(page, { decks: [DECK] });
  await page.goto(BASE, { waitUntil: "domcontentloaded" });
  await page.waitForTimeout(800);
  await seedLearning(page, { answers: [wrongAnswer()], srs: [dueSrs()] });
  await page.reload({ waitUntil: "domcontentloaded" });
  await page.waitForTimeout(900);
  check("library shows the due count", await page.getByText(/Review due · 1 due/).isVisible());

  const tClick = Date.now();
  await page.getByText(/Review due · 1 due/).click();
  let loadingAt = null;
  for (let i = 0; i < 40; i++) {
    if ((await page.getByText("Preparing your review…").count()) > 0) {
      loadingAt = Date.now();
      break;
    }
    await page.waitForTimeout(50);
  }
  check("loading screen appears immediately on tap", loadingAt !== null && loadingAt - tClick < 1000, `${loadingAt ? loadingAt - tClick : "never"} ms`);
  check("still on the library while stalled", page.url().replace(BASE, "") === "/", page.url());
  check("spinner is visible", (await page.getByRole("status").count()) >= 1);

  release();
  let sessionAt = null;
  for (let i = 0; i < 200; i++) {
    if ((await page.getByText("What colour is a clear daytime sky?").count()) > 0) {
      sessionAt = Date.now();
      break;
    }
    await page.waitForTimeout(50);
  }
  check("session arrives after the request releases", sessionAt !== null, `${sessionAt ? sessionAt - tClick : "never"} ms`);
  check("loading screen is gone once the session is up", (await page.getByText("Preparing your review…").count()) === 0);
  check("stalled requests were exercised", stalled > 0, String(stalled));
  await context.close();
}

/* 2. normal flow stays fast; Czech copy; end-to-end grading ---------- */
{
  const { context, page } = await makeReviewPage("cs");
  const tClick = Date.now();
  await page.getByText(/K opakování · 1 k opakování/).click();
  let questionAt = null;
  for (let i = 0; i < 200; i++) {
    if ((await page.getByText("What colour is a clear daytime sky?").count()) > 0) {
      questionAt = Date.now();
      break;
    }
    await page.waitForTimeout(25);
  }
  check("cs: review opens fast without stalling", questionAt !== null && questionAt - tClick < 3000, `${questionAt ? questionAt - tClick : "never"} ms`);
  check("cs: session feed present", (await page.locator('[data-testid="review-feed"]').count()) === 1);
  await page.getByRole("button", { name: "Blue" }).click();
  await page.waitForTimeout(500);
  await page.getByRole("button", { name: "Zobrazit výsledky" }).click();
  await page.waitForTimeout(700);
  check("cs: results slide after answering", await page.getByText("100%").isVisible());
  await page.locator('[data-testid="review-feed"]').getByRole("button", { name: "Zpět do knihovny" }).click();
  await page.waitForTimeout(900);
  check("cs: back in the library", await page.getByRole("heading", { name: "Tvoje mraznička" }).isVisible());
  await context.close();
}

/* 3. mistakes path --------------------------------------------------- */
{
  const { context, page } = await makeReviewPage("en");
  check("mistakes link present", await page.getByText(/Mistakes · 1 mistake/).isVisible());
  await page.getByText(/Mistakes · 1 mistake/).click();
  await page.waitForTimeout(1200);
  check("mistakes session opens", (await page.getByText("What colour is a clear daytime sky?").count()) > 0 && page.url().includes("mistakes=1"));
  await context.close();
}

/* 4. health probes are deduplicated ---------------------------------- */
{
  const { context, page } = await makePage(browser);
  await seed(page, { decks: [] });
  let healthCount = 0;
  page.on("request", (request) => {
    if (new URL(request.url()).pathname === "/api/health") healthCount += 1;
  });
  await page.goto(BASE, { waitUntil: "networkidle" });
  await page.waitForTimeout(1500);
  const afterLibrary = healthCount;
  await page.locator("nav.tabbar").getByRole("link", { name: "Progress" }).click();
  await page.waitForTimeout(1200);
  await page.locator("nav.tabbar").getByRole("link", { name: "Library" }).click();
  await page.waitForTimeout(1200);
  check("library fires one health probe", afterLibrary <= 1, String(afterLibrary));
  check("navigating reuses the cached probe", healthCount === afterLibrary, `${healthCount} total`);
  await context.close();
}

await browser.close();
finish();