ObsiGate/tests/frontend/xlsx-viewer.test.mjs

#!/usr/bin/env node
/**
 * ObsiGate — JSDOM integration tests for the Excel viewer (ROADMAP #153 P0).
 *
 * Loads the real viewer.js module and drives renderXlsxViewer():
 *  - A1 : `xlsx_lossy_features` renders a warning banner; a save on such a
 *         workbook gets 409 `xlsx_lossy_content`, asks for confirmation and
 *         retries with `force: true` (or gives up when refused);
 *  - A4 : the f(x) toggle flips `allow_formula` in the save payload.
 *  - A8 : a sheet bigger than the render caps shows the truncation notice.
 *  - A9bis : the tail of a truncated sheet is fetched window by window from
 *         GET …/xlsx/sheet (scroll sentinel + click), and the appended rows are
 *         editable like the initial ones.
 *  - A7 : formula bar mirrors the active cell; arrows/Tab navigate; editing
 *         from the bar marks the cell dirty; Escape reverts.
 *  - A13 : header click sorts the rendered rows, the filter hides rows, the
 *         find highlights matches, CSV export downloads the visible sheet.
 *  - A14 : the structure menu sends one PUT …/xlsx/structure with the action,
 *         then re-renders from the server; destructive actions confirm first.
 *
 * Usage: node tests/frontend/xlsx-viewer.test.mjs
 */

import { strict as assert } from "node:assert";
import { JSDOM } from "jsdom";
import { fileURLToPath, pathToFileURL } from "node:url";
import { readFileSync } from "node:fs";
import path from "node:path";

const __filename = fileURLToPath(import.meta.url);
const __dirname = path.dirname(__filename);
const REPO_ROOT = path.resolve(__dirname, "..", "..");

// ── JSDOM bootstrap ─────────────────────────────────────────────────────────
const dom = new JSDOM(
  `<!DOCTYPE html>
<html>
<body>
  <div id="content-area"></div>
</body>
</html>`,
  { url: "http://localhost/", pretendToBeVisual: true }
);

const w = dom.window;
globalThis.window = w;
globalThis.document = w.document;
globalThis.DOMParser = w.DOMParser;
globalThis.HTMLElement = w.HTMLElement;
globalThis.Element = w.Element;
globalThis.Node = w.Node;
globalThis.Event = w.Event;
globalThis.CustomEvent = w.CustomEvent;
globalThis.MouseEvent = w.MouseEvent;
globalThis.localStorage = w.localStorage;
globalThis.sessionStorage = w.sessionStorage;
globalThis.requestAnimationFrame = (cb) => setTimeout(() => cb(Date.now()), 0);
Object.defineProperty(globalThis, "navigator", {
  value: w.navigator,
  configurable: true,
  writable: true,
});

// ── fetch / confirm doubles ─────────────────────────────────────────────────
let calls = [];
let nextResponse = () => ({ ok: true, status: 200, body: { status: "ok" } });
let confirmAnswer = true;
let confirmCalls = 0;
// Every confirm() prompt is captured so the tests can assert on its text.
let confirmPrompts = [];

const FR = JSON.parse(
  readFileSync(path.join(REPO_ROOT, "frontend", "locales", "fr.json"), "utf8")
);

globalThis.fetch = async (url, opts = {}) => {
  // The i18n bootstrap fetches the locale files: serve the real FR one so the
  // assertions run on the shipped strings, not on raw keys.
  if (url.includes("/static/locales/")) {
    return { ok: true, status: 200, json: async () => FR };
  }
  calls.push({ url, body: opts.body ? JSON.parse(opts.body) : null });
  const res = nextResponse(url, opts);
  return {
    ok: res.ok,
    status: res.status,
    json: async () => res.body,
  };
};
globalThis.confirm = (msg) => { confirmCalls++; confirmPrompts.push(msg); return confirmAnswer; };
w.confirm = globalThis.confirm;

// ── Helpers ─────────────────────────────────────────────────────────────────
let testCount = 0;
let passCount = 0;

async function test(name, fn) {
  testCount++;
  calls = [];
  confirmCalls = 0;
  confirmPrompts = [];
  confirmAnswer = true;
  apiQueue = [];
  nextResponse = () => {
    if (apiQueue.length) return apiQueue.shift();
    return { ok: true, status: 200, body: { status: "ok" } };
  };
  try {
    await fn();
    console.log(`  ✓ ${name}`);
    passCount++;
  } catch (e) {
    console.log(`  ✗ ${name}`);
    console.log(`    ${e.message}`);
    if (e.stack) console.log(`    ${e.stack.split("\n").slice(1, 3).join("\n    ")}`);
  }
}

const { renderXlsxViewer } = await import(
  pathToFileURL(path.join(REPO_ROOT, "frontend", "js", "viewer.js")).href
);
// Load the FR catalog so t() resolves the real strings.
const { initI18n } = await import(
  pathToFileURL(path.join(REPO_ROOT, "frontend", "js", "i18n.js")).href
);
await initI18n();

const sheetHtml = (value) =>
  '<div class="csv-table-wrapper"><table class="csv-table xlsx-table">' +
  '<thead><tr><th class="xlsx-corner"></th><th>A</th><th>B</th></tr></thead><tbody>' +
  `<tr><th class="xlsx-rownum">1</th><td data-cell="A1">${value}</td><td data-cell="B1">B1</td></tr>` +
  '<tr><th class="xlsx-rownum">2</th><td data-cell="A2">A2</td><td data-cell="B2">B2</td></tr>' +
  "</tbody></table></div>";

// The JSDOM fetch double serves locale files; everything else is a recorded
// API call answered by `nextResponse`. `apiQueue` lets a test script the
// successive windows a lazy-loading sheet will request.
let apiQueue = [];

function mount({ lossy = [], sheet = {} } = {}) {
  const area = document.getElementById("content-area");
  area.innerHTML = "";
  renderXlsxViewer(area, {
    vault: "V",
    path: "data.xlsx",
    is_xlsx: true,
    xlsx_sheets: [{ name: "Feuille1", html: sheetHtml("100"), ...sheet }],
    xlsx_lossy_features: lossy,
  });
  return area;
}

/** Mount a sheet flagged truncated so wireLazyRows() arms the footnote. */
function mountTruncated({ total = 520, rows = 1 } = {}) {
  return mount({
    sheet: { rows, cols: 3, total_rows: total, total_cols: 3, max_rows: 500, max_cols: 40, truncated: total > 500 },
  });
}

/** Mark a cell dirty the way a user edit would. */
function editCell(area, ref, text) {
  const td = area.querySelector(`td[data-cell="${ref}"]`);
  td.textContent = text;
  td.dispatchEvent(new w.Event("input", { bubbles: true }));
  return td;
}

const lossyError = {
  ok: false,
  status: 409,
  body: {
    detail: "Saving this workbook would drop features…",
    code: "xlsx_lossy_content",
    details: { features: ["slicers"] },
  },
};

console.log("\n── xlsx viewer JSDOM integration tests (#153 P0) ──\n");

// ── A1 — warning banner ─────────────────────────────────────────────────────

await test("no banner when the workbook has nothing at risk", () => {
  const area = mount();
  assert.equal(area.querySelector(".xlsx-warning"), null);
});

await test("banner lists every lossy feature reported by the backend", () => {
  const area = mount({ lossy: ["cached_values", "slicers"] });
  const banner = area.querySelector(".xlsx-warning");
  assert.ok(banner, "banner absent");
  const tags = [...banner.querySelectorAll(".xlsx-warning-tag")].map((n) => n.textContent);
  assert.equal(tags.length, 2);
  assert.ok(tags.includes(FR["xlsx.feature_cached_values"]), tags.join("|"));
  assert.ok(tags.includes(FR["xlsx.feature_slicers"]), tags.join("|"));
  assert.ok(banner.textContent.includes(FR["xlsx.lossy_title"]));
  assert.ok(banner.textContent.includes(FR["xlsx.lossy_hint"]));
});

await test("formula toggle is present and starts unpressed", () => {
  const area = mount();
  const btn = area.querySelector("#xlsx-formula-btn");
  assert.ok(btn);
  assert.equal(btn.getAttribute("aria-pressed"), "false");
  assert.equal(btn.getAttribute("title"), FR["xlsx.formula_toggle_title"]);
});

// ── Save payload ────────────────────────────────────────────────────────────

await test("save sends one PUT per dirty sheet with the cell map", async () => {
  const area = mount();
  editCell(area, "A1", "250");
  area.querySelector("#xlsx-save-btn").click();
  await new Promise((r) => setTimeout(r, 0));
  assert.equal(calls.length, 1);
  assert.match(calls[0].url, /\/api\/file\/V\/xlsx\/save\?path=data\.xlsx/);
  assert.deepEqual(calls[0].body.cells, { A1: "250" });
  assert.equal(calls[0].body.sheet, "Feuille1");
  assert.equal(calls[0].body.force, false);
  assert.equal(calls[0].body.allow_formula, false);
});

await test("save button stays disabled when nothing is dirty", async () => {
  const area = mount();
  const btn = area.querySelector("#xlsx-save-btn");
  assert.equal(btn.disabled, true);
  btn.click();
  await new Promise((r) => setTimeout(r, 0));
  assert.equal(calls.length, 0);
});

// ── A4 — formula toggle ─────────────────────────────────────────────────────

await test("f(x) toggle flips allow_formula on the next save", async () => {
  const area = mount();
  area.querySelector("#xlsx-formula-btn").click();
  assert.equal(area.querySelector("#xlsx-formula-btn").getAttribute("aria-pressed"), "true");
  editCell(area, "A1", "=B1*2");
  area.querySelector("#xlsx-save-btn").click();
  await new Promise((r) => setTimeout(r, 0));
  assert.equal(calls[0].body.allow_formula, true);
});

// ── A1 — 409 confirmation & force retry ─────────────────────────────────────

await test("409 xlsx_lossy_content asks once then retries with force", async () => {
  const area = mount({ lossy: ["slicers"] });
  editCell(area, "A1", "250");
  nextResponse = () => (calls.length === 1 ? lossyError : { ok: true, status: 200, body: {} });
  area.querySelector("#xlsx-save-btn").click();
  await new Promise((r) => setTimeout(r, 10));
  assert.equal(confirmCalls, 1);
  assert.equal(calls.length, 2);
  assert.equal(calls[0].body.force, false);
  assert.equal(calls[1].body.force, true);
  // The prompt names the features the backend reported.
  assert.ok(confirmPrompts[0].includes(FR["xlsx.feature_slicers"]), confirmPrompts[0]);
  // Save succeeded → cells are no longer dirty.
  assert.equal(area.querySelectorAll("td.xlsx-dirty").length, 0);
});

await test("confirming once is enough for the following saves", async () => {
  const area = mount({ lossy: ["cached_values"] });
  editCell(area, "A1", "1");
  nextResponse = () => (calls.length === 1 ? lossyError : { ok: true, status: 200, body: {} });
  area.querySelector("#xlsx-save-btn").click();
  await new Promise((r) => setTimeout(r, 10));
  editCell(area, "A1", "2");
  area.querySelector("#xlsx-save-btn").click();
  await new Promise((r) => setTimeout(r, 10));
  assert.equal(confirmCalls, 1, "the user is not asked twice");
  assert.equal(calls.length, 3);
  assert.equal(calls[2].body.force, true);
});

await test("refusing the confirmation writes nothing and keeps the cells dirty", async () => {
  const area = mount({ lossy: ["slicers"] });
  editCell(area, "A1", "250");
  nextResponse = () => lossyError;
  confirmAnswer = false;
  area.querySelector("#xlsx-save-btn").click();
  await new Promise((r) => setTimeout(r, 10));
  assert.equal(confirmCalls, 1);
  assert.equal(calls.length, 1, "no retry after a refusal");
  assert.equal(area.querySelectorAll("td.xlsx-dirty").length, 1);
  assert.equal(area.querySelector("#xlsx-save-btn").disabled, false);
});

await test("a non-409 failure is not retried", async () => {
  const area = mount();
  editCell(area, "A1", "250");
  nextResponse = () => ({ ok: false, status: 500, body: { detail: "boom" } });
  area.querySelector("#xlsx-save-btn").click();
  await new Promise((r) => setTimeout(r, 10));
  assert.equal(calls.length, 1);
  assert.equal(confirmCalls, 0);
  assert.equal(area.querySelectorAll("td.xlsx-dirty").length, 1);
});

// ── A8 — truncation notice ───────────────────────────────────────────────────

await test("no notice when the sheet fits within the render caps", () => {
  const area = mount({
    sheet: { rows: 500, cols: 40, total_rows: 500, total_cols: 40, max_rows: 500, max_cols: 40, truncated: false },
  });
  assert.equal(area.querySelector(".xlsx-truncated"), null);
});

await test("notice states the cap and the real size of a truncated sheet", () => {
  const area = mount({
    sheet: { rows: 500, cols: 12, total_rows: 1200, total_cols: 12, max_rows: 500, max_cols: 40, truncated: true },
  });
  const note = area.querySelector(".xlsx-truncated");
  assert.ok(note, "notice absent");
  const txt = note.textContent;
  assert.ok(txt.includes(FR["xlsx.truncated_title"]), txt);
  // {shown} is the CAP (500), not the post-trim row count: a sparse sheet
  // renders 1 row but the view still reaches 500 of them.
  const expected = FR["xlsx.truncated_rows"].replace("{shown}", "500").replace("{total}", "1200");
  assert.ok(txt.includes(expected), `${txt} !includes ${expected}`);
  // Nothing to say about the columns here (12 < 40).
  assert.ok(!txt.includes(FR["xlsx.truncated_cols"]), txt);
});

await test("notice mentions both axes when rows AND columns overflow", () => {
  const area = mount({
    sheet: { rows: 1, cols: 40, total_rows: 501, total_cols: 45, max_rows: 500, max_cols: 40, truncated: true },
  });
  const txt = area.querySelector(".xlsx-truncated").textContent;
  assert.ok(
    txt.includes(FR["xlsx.truncated_cols"].replace("{shown}", "40").replace("{total}", "45")),
    txt
  );
});

await test("a payload without the dimensions shows no notice", () => {
  // Backward compatibility: an older cached response must not produce "NaN".
  const area = mount({ sheet: { name: "Feuille1" } });
  assert.equal(area.querySelector(".xlsx-truncated"), null);
  assert.ok(!area.textContent.includes("NaN"));
});

// ── A9bis — lazy loading of the truncated tail ──────────────────────────────

const windowHtml = (from, to) =>
  '<div class="csv-table-wrapper"><table class="csv-table xlsx-table">' +
  "<tbody>" +
  Array.from({ length: to - from + 1 }, (_, i) => {
    const r = from + i;
    return `<tr><th class="xlsx-rownum">${r}</th><td data-cell="A${r}">Ligne ${r}</td></tr>`;
  }).join("") +
  "</tbody></table></div>";

await test("a truncated sheet gets a load-more footnote, a normal one does not", () => {
  const truncated = mountTruncated();
  assert.ok(truncated.querySelector(".xlsx-load-more"), "footnote absent");
  assert.ok(truncated.querySelector(".xlsx-load-more").textContent.includes(FR["xlsx.load_more"]));

  const plain = mount({ sheet: { rows: 10, cols: 2, total_rows: 10, total_cols: 2, max_rows: 500, max_cols: 40, truncated: false } });
  assert.equal(plain.querySelector(".xlsx-load-more"), null);
});

await test("clicking the footnote fetches the next window with the right query", async () => {
  const area = mountTruncated();
  apiQueue.push({
    ok: true,
    status: 200,
    body: { sheet: "Feuille1", offset: 1, limit: 500, rows: 2, total_rows: 3, truncated: true, has_more: false, html: windowHtml(2, 3) },
  });
  area.querySelector(".xlsx-load-more").click();
  await new Promise((r) => setTimeout(r, 5));
  assert.equal(calls.length, 1);
  assert.match(calls[0].url, /\/api\/file\/V\/xlsx\/sheet\?path=data\.xlsx&sheet=Feuille1&offset=1&limit=500/);
  // Rows 2 and 3 landed in the table with their real coordinates.
  assert.ok(area.querySelector('td[data-cell="A2"]'));
  assert.ok(area.querySelector('td[data-cell="A3"]'));
  assert.ok(area.querySelector('th.xlsx-rownum') && area.textContent.includes("Ligne 3"));
  // Everything loaded → the footnote is hidden (kept in the DOM, class `done`).
  const foot = area.querySelector(".xlsx-load-more");
  assert.ok(foot, "the footnote element survives");
  assert.equal(foot.classList.contains("done"), true);
  assert.ok(!foot.textContent.includes(FR["xlsx.load_more"]), foot.textContent);
});

await test("appended rows are editable and tracked as dirty", async () => {
  const area = mountTruncated();
  apiQueue.push({
    ok: true,
    status: 200,
    body: { sheet: "Feuille1", offset: 1, limit: 500, rows: 1, total_rows: 3, truncated: true, has_more: false, html: windowHtml(2, 2) },
  });
  area.querySelector(".xlsx-load-more").click();
  await new Promise((r) => setTimeout(r, 5));
  editCell(area, "A2", "modifié");
  area.querySelector("#xlsx-save-btn").click();
  await new Promise((r) => setTimeout(r, 5));
  assert.equal(calls.length, 2, "the save went out");
  assert.equal(calls[1].url.includes("/xlsx/save"), true);
  assert.deepEqual(calls[1].body.cells, { A2: "modifié" });
  assert.equal(calls[1].body.sheet, "Feuille1");
});

await test("a failed window fetch keeps the footnote and shows an error toast", async () => {
  const area = mountTruncated();
  apiQueue.push({ ok: false, status: 500, body: { detail: "boom" } });
  area.querySelector(".xlsx-load-more").click();
  await new Promise((r) => setTimeout(r, 5));
  const foot = area.querySelector(".xlsx-load-more");
  assert.ok(foot, "footnote must survive a failed fetch");
  assert.ok(foot.textContent.includes(FR["xlsx.load_more"]), foot.textContent);
  // `api()` itself toasts the failure (shared behaviour, asserted in E2E);
  // here we assert the local consequence: the footnote keeps its label.
  // Retrying works once the server answers again.
  apiQueue.push({
    ok: true,
    status: 200,
    body: { sheet: "Feuille1", offset: 1, limit: 500, rows: 1, total_rows: 3, truncated: true, has_more: false, html: windowHtml(2, 2) },
  });
  foot.click();
  await new Promise((r) => setTimeout(r, 5));
  assert.ok(area.querySelector('td[data-cell="A2"]'));
  assert.equal(area.querySelector(".xlsx-load-more").classList.contains("done"), true);
});

// ── A7 — formula bar & keyboard navigation ──────────────────────────────────

await test("the formula bar starts empty and disabled", () => {
  const area = mount();
  assert.equal(area.querySelector("#xlsx-active-cell").textContent, "—");
  assert.equal(area.querySelector("#xlsx-formula-input").disabled, true);
});

await test("focusing a cell shows its name and content in the bar", () => {
  const area = mount();
  const td = area.querySelector('td[data-cell="A1"]');
  td.dispatchEvent(new w.Event("focus", { bubbles: false }));
  // JSDOM does not run the default focus behaviour on dispatchEvent, so go
  // through the real API:
  td.focus();
  assert.equal(area.querySelector("#xlsx-active-cell").textContent, "A1");
  assert.equal(area.querySelector("#xlsx-formula-input").value, "100");
  assert.equal(area.querySelector("#xlsx-formula-input").disabled, false);
});

await test("typing in the bar edits the cell live and marks it dirty", () => {
  const area = mount();
  const td = area.querySelector('td[data-cell="A1"]');
  td.focus();
  const input = area.querySelector("#xlsx-formula-input");
  input.value = "depuis la barre";
  input.dispatchEvent(new w.Event("input", { bubbles: true }));
  assert.equal(td.textContent, "depuis la barre");
  assert.equal(td.classList.contains("xlsx-dirty"), true);
  assert.equal(area.querySelector("#xlsx-save-btn").disabled, false);
  // The save payload carries the cell edit.
  area.querySelector("#xlsx-save-btn").click();
  return new Promise((r) => setTimeout(r, 5)).then(() => {
    assert.deepEqual(calls[0].body.cells, { A1: "depuis la barre" });
  });
});

await test("Tab and arrows move to the neighbour cell", () => {
  const area = mount();
  const a1 = area.querySelector('td[data-cell="A1"]');
  a1.focus();
  a1.dispatchEvent(new w.KeyboardEvent("keydown", { key: "Tab", bubbles: true }));
  assert.equal(area.querySelector("#xlsx-active-cell").textContent, "B1");
  const b1 = area.querySelector('td[data-cell="B1"]');
  b1.dispatchEvent(new w.KeyboardEvent("keydown", { key: "ArrowDown", bubbles: true }));
  assert.equal(area.querySelector("#xlsx-active-cell").textContent, "B2");
  const b2 = area.querySelector('td[data-cell="B2"]');
  b2.dispatchEvent(new w.KeyboardEvent("keydown", { key: "ArrowLeft", bubbles: true }));
  assert.equal(area.querySelector("#xlsx-active-cell").textContent, "A2");
});

await test("Enter commits and Shift+Tab goes backwards", () => {
  const area = mount();
  const a1 = area.querySelector('td[data-cell="A1"]');
  a1.focus();
  a1.dispatchEvent(new w.KeyboardEvent("keydown", { key: "Tab", bubbles: true }));
  const b1 = area.querySelector('td[data-cell="B1"]');
  b1.dispatchEvent(new w.KeyboardEvent("keydown", { key: "Tab", shiftKey: true, bubbles: true }));
  assert.equal(area.querySelector("#xlsx-active-cell").textContent, "A1");
});

await test("a saved edit from the bar resets the dirty flag and orig value", async () => {
  const area = mount();
  const td = area.querySelector('td[data-cell="A1"]');
  td.focus();
  const input = area.querySelector("#xlsx-formula-input");
  input.value = "200";
  input.dispatchEvent(new w.Event("input", { bubbles: true }));
  area.querySelector("#xlsx-save-btn").click();
  await new Promise((r) => setTimeout(r, 5));
  assert.equal(area.querySelectorAll("td.xlsx-dirty").length, 0);
  assert.equal(td.dataset.orig, "200");
});

// ── A13 — sort / filter / find / CSV export ─────────────────────────────────

const mountGrid = () => {
  const area = document.getElementById("content-area");
  area.innerHTML = "";
  const grid =
    '<div class="csv-table-wrapper"><table class="csv-table xlsx-table">' +
    '<thead><tr><th class="xlsx-corner"></th><th>A</th><th>B</th></tr></thead><tbody>' +
    '<tr><th class="xlsx-rownum">1</th><td data-cell="A1">Banane</td><td data-cell="B1">3</td></tr>' +
    '<tr><th class="xlsx-rownum">2</th><td data-cell="A2">Abricot</td><td data-cell="B2">10</td></tr>' +
    '<tr><th class="xlsx-rownum">3</th><td data-cell="A3">Cerise</td><td data-cell="B3">2</td></tr>' +
    "</tbody></table></div>";
  renderXlsxViewer(area, {
    vault: "V", path: "data.xlsx", is_xlsx: true,
    xlsx_sheets: [{ name: "Fruits", html: grid, rows: 3, cols: 2, total_rows: 3, total_cols: 2, max_rows: 500, max_cols: 40, truncated: false }],
    xlsx_lossy_features: [],
  });
  return area;
};

await test("clicking a header sorts the rows numerically or lexically", () => {
  const area = mountGrid();
  // Sort by column B (numbers) ascending: 2, 3, 10.
  area.querySelector(".xlsx-table thead th:nth-child(3)").click();
  let cells = [...area.querySelectorAll("tbody td[data-cell^=\"B\"]")].map((td) => td.textContent);
  assert.deepEqual(cells, ["2", "3", "10"]);
  // Second click: descending.
  area.querySelector(".xlsx-table thead th:nth-child(3)").click();
  cells = [...area.querySelectorAll("tbody td[data-cell^=\"B\"]")].map((td) => td.textContent);
  assert.deepEqual(cells, ["10", "3", "2"]);
});

await test("a dirty cell travels with its row during a sort", () => {
  const area = mountGrid();
  editCell(area, "A3", "Cerise modifiée");
  area.querySelector(".xlsx-table thead th:nth-child(3)").click();
  const aCells = [...area.querySelectorAll("tbody td[data-cell^=\"A\"]")].map((td) => td.textContent);
  assert.ok(aCells.includes("Cerise modifiée"), aCells.join("|"));
  assert.equal(area.querySelectorAll("td.xlsx-dirty").length, 1);
});

await test("the filter hides the rows that do not match", () => {
  const area = mountGrid();
  // The filter reuses the find input: type and the rows filter live.
  const input = area.querySelector("#xlsx-find-input");
  input.value = "abri";
  input.dispatchEvent(new w.Event("input", { bubbles: true }));
  const visible = [...area.querySelectorAll("tbody tr")].filter((tr) => tr.style.display !== "none");
  assert.equal(visible.length, 1);
  assert.ok(visible[0].textContent.includes("Abricot"));
});

await test("find highlights matches and navigates with the counter", () => {
  const area = mountGrid();
  const input = area.querySelector("#xlsx-find-input");
  const count = area.querySelector("#xlsx-find-count");
  input.value = "cerise"; // lowercase: the default search ignores the case
  input.dispatchEvent(new w.Event("input", { bubbles: true }));
  assert.equal(area.querySelectorAll("mark.xlsx-find-hit").length, 1);
  assert.ok(count.textContent.includes("1/1"), count.textContent);
  // The hit is inside the matching cell.
  assert.ok(area.querySelector('td[data-cell="A3"] mark.xlsx-find-hit'));
});

await test("CSV export downloads the visible sheet without the cached shadows", () => {
  const area = mountGrid();
  const clicks = [];
  const realCreate = document.createElement.bind(document);
  const anchor = realCreate("a");
  document.createElement = (tag) => {
    if (tag === "a") { clicks.push(1); return anchor; }
    return realCreate(tag);
  };
  let href = "";
  Object.defineProperty(anchor, "href", { set(v) { href = v; }, get: () => href });
  URL.createObjectURL = () => "blob:x";
  URL.revokeObjectURL = () => {};
  area.querySelector("#xlsx-csv-btn").click();
  document.createElement = realCreate;
  assert.equal(clicks.length, 1);
  assert.equal(anchor.download, "Fruits.csv");
});

// ── A14 — structure menu ───────────────────────────────────────────────────

await test("sheet_add asks for a name, PUTs the action and re-renders", async () => {
  const area = mount();
  // The prompt is resolved through the module scope: stub it globally.
  const realPrompt = globalThis.prompt;
  globalThis.prompt = () => "Feuille 2";
  apiQueue.push({ ok: true, status: 200, body: { status: "ok" } }); // PUT
  apiQueue.push({
    ok: true, status: 200,
    body: { is_xlsx: true, vault: "V", path: "data.xlsx", xlsx_sheets: [{ name: "Feuille 2", html: sheetHtml("neuf") }], xlsx_lossy_features: [] },
  }); // re-read
  area.querySelector("#xlsx-structure-btn").click();
  const items = [...area.querySelectorAll(".xlsx-structure-item")];
  const addBtn = items.find((b) => b.textContent === FR["xlsx.sheet_add"]);
  addBtn.click();
  await new Promise((r) => setTimeout(r, 5));
  globalThis.prompt = realPrompt;
  assert.equal(calls.length, 2);
  assert.match(calls[0].url, /\/xlsx\/structure\?path=data\.xlsx/);
  assert.deepEqual(calls[0].body.actions, [{ op: "sheet_add", name: "Feuille 2" }]);
  assert.equal(calls[0].body.force, false);
  // The viewer re-rendered from the server payload (a single sheet → no tabs).
  assert.ok(
    area.querySelector("#content-area, .xlsx-viewer") || area,
    "the viewer was rebuilt",
  );
  assert.ok(
    area.querySelector('td[data-cell="A1"]')?.textContent === "neuf",
    "the re-render shows the fresh payload",
  );
});

await test("sheet_delete confirms and is refused on the last sheet", async () => {
  const area = mount();
  const delBtn = () => {
    area.querySelector("#xlsx-structure-btn").click();
    const items = [...area.querySelectorAll(".xlsx-structure-item")];
    const b = items.find((x) => x.textContent === FR["xlsx.sheet_delete"]);
    b.click();
  };
  // One sheet only → blocked before even confirming (no network call).
  delBtn();
  assert.equal(calls.length, 0, "nothing sent: last sheet");
});

await test("the 409 lossy flow re-emits with force after confirmation", async () => {
  const area = mount();
  // The prompt is resolved through the module scope: stub it globally.
  const realPrompt = globalThis.prompt;
  globalThis.prompt = () => "Feuille 2";
  apiQueue.push({
    ok: false, status: 409,
    body: { detail: "…", code: "xlsx_lossy_content", details: { features: ["slicers"] } },
  });
  apiQueue.push({ ok: true, status: 200, body: { status: "ok" } }); // retry w/ force
  apiQueue.push({
    ok: true, status: 200,
    body: { is_xlsx: true, vault: "V", path: "data.xlsx", xlsx_sheets: [{ name: "Feuille1", html: sheetHtml("1") }], xlsx_lossy_features: [] },
  });
  area.querySelector("#xlsx-structure-btn").click();
  const items = [...area.querySelectorAll(".xlsx-structure-item")];
  items.find((b) => b.textContent === FR["xlsx.sheet_add"]).click();
  await new Promise((r) => setTimeout(r, 10));
  globalThis.prompt = realPrompt;
  assert.equal(confirmCalls, 1, "the user is asked about the lossy write");
  assert.equal(calls.length, 3);
  assert.equal(calls[1].body.force, true);
});

// ── A17 — dashboard panel ─────────────────────────────────────────────
await test("the dashboard button fetches the metadata and renders named ranges + KPIs", async () => {
  const area = mount();
  const dashBtn = area.querySelector("#xlsx-dashboard-btn");
  assert.ok(dashBtn, "the dashboard button exists for an editable workbook");
  apiQueue.push({
    ok: true,
    status: 200,
    body: {
      vault: "V",
      path: "data.xlsx",
      named_ranges: [{ name: "MaPlage", scope: "", ref: "Data!$A$1:$B$5" }],
      objects: { charts: 2, pivots: 1 },
      sheets: [{ name: "Feuille1", cells: 9, rows: 3, cols: 3, formulas: 1, numeric: 2, kpi: [{ label: "A2", value: 12 }] }],
    },
  });
  dashBtn.click();
  await new Promise((r) => setTimeout(r, 5));
  assert.match(calls[0].url, /\/xlsx\/dashboard\?path=data\.xlsx/);
  const panel = area.querySelector(".xlsx-dashboard");
  assert.ok(panel, "the dashboard panel is rendered");
  assert.ok(panel.textContent.includes("MaPlage"), "named range is listed");
  assert.ok(panel.textContent.includes("A2"), "KPI label is rendered");
  assert.ok(panel.textContent.includes("12"), "KPI value is rendered");
  // Second click closes the panel.
  dashBtn.click();
  assert.equal(area.querySelector(".xlsx-dashboard"), null, "panel toggles closed");
});

await test("a csv mounts without the dashboard button", () => {
  const area = document.getElementById("content-area");
  area.innerHTML = "";
  renderXlsxViewer(area, {
    vault: "V",
    path: "data.csv",
    is_csv: true,
    xlsx_sheets: [{ name: "Feuille1", html: sheetHtml("100") }],
    xlsx_lossy_features: [],
  });
  assert.equal(area.querySelector("#xlsx-dashboard-btn"), null, "no dashboard for csv");
  assert.equal(area.querySelector("#xlsx-structure-btn"), null, "no structure menu for csv");
  assert.ok(area.querySelector("td[data-cell=\"A1\"]"), "the grid is still editable");
});

await test("two windows in a row walk the whole sheet", async () => {
  const area = mountTruncated({ total: 1200 });
  apiQueue.push({
    ok: true,
    status: 200,
    body: { sheet: "Feuille1", offset: 1, limit: 500, rows: 500, total_rows: 1200, truncated: true, has_more: true, html: windowHtml(2, 501) },
  });
  area.querySelector(".xlsx-load-more").click();
  await new Promise((r) => setTimeout(r, 5));
  assert.ok(area.querySelector('td[data-cell="A501"]'));
  // The footnote still shows, with the updated progress.
  let foot = area.querySelector(".xlsx-load-more");
  assert.ok(foot, "more rows remain");
  assert.ok(foot.textContent.includes("501"), foot.textContent);

  apiQueue.push({
    ok: true,
    status: 200,
    body: { sheet: "Feuille1", offset: 501, limit: 500, rows: 200, total_rows: 1200, truncated: true, has_more: false, html: windowHtml(502, 701) },
  });
  foot.click();
  await new Promise((r) => setTimeout(r, 5));
  assert.ok(area.querySelector('td[data-cell="A701"]'));
  assert.equal(area.querySelector(".xlsx-load-more").classList.contains("done"), true);
});

// ── Report ──────────────────────────────────────────────────────────────────
console.log(`\n${passCount}/${testCount} tests passed\n`);
process.exit(passCount === testCount ? 0 : 1);