HealthLog/src/components/admin/__tests__/admin-shell.test.tsx

import { describe, expect, it, vi } from "vitest";
import { renderToStaticMarkup } from "react-dom/server";

/**
 * `<AdminShell>` mirrors `<SettingsShell>`: a sticky desktop sidebar
 * plus a horizontal section strip on mobile. With 13 sections the strip
 * is always wider than a 393 CSS-px (Pixel-5) viewport, so v1.4.18
 * phase A2 added the `no-scrollbar` class to the strip — Chromium /
 * WebKit otherwise paint an always-on horizontal scrollbar at the top
 * of every admin page, which the maintainer kept mis-attributing to the
 * `/admin/api-tokens` table card right below it. Three previous fix
 * attempts (v1.4.15 column-hide, v1.4.16 mobile-card-list, then this
 * one) all targeted the table while the bar lived in the shell.
 *
 * This suite locks in the shell-level fix so a future refactor can't
 * silently regress it.
 */

const mockPathnameRef = { value: "/admin/system-status" };
vi.mock("next/navigation", () => ({
  usePathname: () => mockPathnameRef.value,
}));

import { readdirSync, statSync } from "node:fs";
import { join } from "node:path";

import { I18nProvider } from "@/lib/i18n/context";
import { ADMIN_SECTION_SLUGS } from "../section-slugs";
import { ADMIN_SECTIONS, AdminShell } from "../admin-shell";

function renderShell(props: {
  active?: (typeof ADMIN_SECTIONS)[number]["slug"];
  pathname?: string;
}) {
  mockPathnameRef.value = props.pathname ?? "/admin/system-status";
  return renderToStaticMarkup(
    <I18nProvider initialLocale="en">
      <AdminShell active={props.active}>
        <div>section body</div>
      </AdminShell>
    </I18nProvider>,
  );
}

describe("<AdminShell>", () => {
  it("renders every section link in both the mobile strip and the desktop sidebar", () => {
    const html = renderShell({ active: "system-status" });
    for (const section of ADMIN_SECTIONS) {
      const matches = html.match(
        new RegExp(`href="/admin/${section.slug}"`, "g"),
      );
      // Two renders — mobile strip + desktop sidebar.
      expect(matches?.length ?? 0).toBe(2);
    }
  });

  it("mobile section strip uses `no-scrollbar` so the swipe area doesn't paint a horizontal scrollbar", () => {
    // The 13-section strip is ~1700 CSS px wide. Without
    // `no-scrollbar` (defined in `globals.css`) Chromium/WebKit paint
    // an always-on horizontal scrollbar at the top of every admin
    // page. A live probe of /admin/api-tokens at a Pixel-5 viewport
    // pins this as the *only* element
    // with `overflow-x:auto AND scrollWidth > clientWidth`, so the
    // class is the load-bearing fix.
    const html = renderShell({ active: "api-tokens" });
    const nav = html.match(/<nav\b[^>]*md:hidden[^>]*>/);
    expect(nav).not.toBeNull();
    expect(nav![0]).toMatch(/\bno-scrollbar\b/);
    // Scroll behaviour itself is preserved — the strip still uses
    // `overflow-x-auto` so swipe / keyboard-arrow scrolling continues
    // to work, only the painted bar is suppressed.
    expect(nav![0]).toMatch(/\boverflow-x-auto\b/);
  });

  it('marks the active section with aria-current="page" in both layouts', () => {
    const html = renderShell({ active: "api-tokens" });
    const occurrences = html.match(/aria-current="page"/g);
    // Two layouts (mobile strip + desktop sidebar) → two matches.
    expect(occurrences?.length ?? 0).toBe(2);
    // Active link is on the api-tokens href in both renders.
    const activeLinkRegex =
      /<a\b[^>]*\baria-current="page"[^>]*\bhref="\/admin\/api-tokens"|<a\b[^>]*\bhref="\/admin\/api-tokens"[^>]*\baria-current="page"/g;
    expect(html.match(activeLinkRegex)?.length ?? 0).toBe(2);
  });

  it("derives the active slug from the current pathname when `active` is omitted", () => {
    const html = renderShell({ pathname: "/admin/api-tokens" });
    const activeLinkRegex =
      /<a\b[^>]*\baria-current="page"[^>]*\bhref="\/admin\/api-tokens"|<a\b[^>]*\bhref="\/admin\/api-tokens"[^>]*\baria-current="page"/g;
    expect(html.match(activeLinkRegex)?.length ?? 0).toBe(2);
  });

  it("ADMIN_SECTIONS covers every slug in ADMIN_SECTION_SLUGS (drift guard)", () => {
    // Hand-maintained `ADMIN_SECTIONS` (sidebar nav) used to drift from
    // `ADMIN_SECTION_SLUGS` (slug list / generateStaticParams source of
    // truth). v1.4.23 W6 design review CRIT C1 caught coach-feedback
    // missing from the nav even though the slug + page + i18n shipped.
    const navSlugs = new Set(ADMIN_SECTIONS.map((s) => s.slug));
    for (const slug of ADMIN_SECTION_SLUGS) {
      expect(
        navSlugs.has(slug),
        `ADMIN_SECTIONS missing nav entry for ${slug}`,
      ).toBe(true);
    }
  });

  it("every /admin/[section] page slug has a matching ADMIN_SECTIONS nav entry", () => {
    // Walks the filesystem so any new admin section page added under
    // ADMIN_SECTION_SLUGS without a nav entry fails this test. Since
    // /admin/[section] is a single dynamic route, the slug source of
    // truth is the union of `ADMIN_SECTION_SLUGS` and the renderer's
    // exhaustive switch — both have to know about the slug for the
    // page to render.
    const renderer = readdirSync(
      join(process.cwd(), "src/app/admin/[section]"),
    );
    expect(renderer).toContain("page.tsx");
    expect(renderer).toContain("renderer.tsx");
    const navSlugs = new Set(ADMIN_SECTIONS.map((s) => s.slug));
    for (const slug of ADMIN_SECTION_SLUGS) {
      expect(
        navSlugs.has(slug),
        `slug ${slug} registered in ADMIN_SECTION_SLUGS but missing from ADMIN_SECTIONS`,
      ).toBe(true);
    }
    // Touch statSync so the import isn't dead — and so the
    // filesystem read isn't accidentally noop'd by a future tree-
    // shaker pass.
    expect(
      statSync(
        join(process.cwd(), "src/app/admin/[section]/page.tsx"),
      ).isFile(),
    ).toBe(true);
  });

  it("does NOT mark any section active on `/admin` overview", () => {
    const html = renderShell({ pathname: "/admin" });
    // Overview-link only — no section gets aria-current.
    const sectionActive = html.match(
      /aria-current="page"[^>]*\bhref="\/admin\/[^"]+"/g,
    );
    expect(sectionActive?.length ?? 0).toBe(0);
  });
});