teach/test/frontend.test.js

import test from 'node:test';
import assert from 'node:assert/strict';
import zlib from 'node:zlib';
import { readFile } from 'node:fs/promises';
import { fileURLToPath } from 'node:url';
import { dirname, join } from 'node:path';
import Fastify from 'fastify';
import fastifyCompress from '@fastify/compress';
import { registerFrontend, resolveAppVersion } from '../src/frontend.js';

const __dirname = dirname(fileURLToPath(import.meta.url));
const publicRoot = join(__dirname, '..', 'public');

// Zelfde volgorde als src/server.js: compress vóór de frontend-registratie.
async function makeApp(version = '1.2.3-test') {
  const app = Fastify();
  await app.register(fastifyCompress, {
    global: true,
    encodings: ['br', 'gzip'],
    threshold: 1024,
    brotliOptions: { params: { [zlib.constants.BROTLI_PARAM_QUALITY]: 4 } },
    zlibOptions: { level: 6 },
  });
  await registerFrontend(app, { root: publicRoot, version });
  await app.ready();
  return app;
}

test('index.html wordt geserveerd met versie-injectie en no-cache', async () => {
  const app = await makeApp();
  const res = await app.inject({ url: '/' });
  assert.equal(res.statusCode, 200);
  assert.match(res.headers['content-type'], /text\/html/);
  assert.equal(res.headers['cache-control'], 'no-cache');
  assert.ok(res.payload.includes('?v=1.2.3-test'), 'versie hoort geïnjecteerd te zijn');
  assert.ok(!res.payload.includes('__V__'), 'geen placeholder meer in de uitvoer');
  const alias = await app.inject({ url: '/index.html' });
  assert.equal(alias.headers['cache-control'], 'no-cache');
  await app.close();
});

test('js en css zijn een jaar immutable; fonts en img korter zonder immutable', async () => {
  const app = await makeApp();
  for (const url of ['/js/core.js', '/css/teach.css']) {
    const res = await app.inject({ url });
    assert.equal(res.statusCode, 200, url);
    assert.equal(res.headers['cache-control'], 'public, max-age=31536000, immutable', url);
  }
  const font = await app.inject({ url: '/fonts/quicksand.woff2' });
  assert.equal(font.headers['cache-control'], 'public, max-age=604800');
  assert.ok(font.headers.etag, 'etag als 304-vangnet voor ongeversioneerde assets');
  const img = await app.inject({ url: '/img/logo.svg' });
  assert.equal(img.headers['cache-control'], 'public, max-age=86400');
  await app.close();
});

test('assets gaan gecomprimeerd over de lijn (gzip én brotli)', async () => {
  const app = await makeApp();
  const gz = await app.inject({ url: '/css/teach.css', headers: { 'accept-encoding': 'gzip' } });
  assert.equal(gz.headers['content-encoding'], 'gzip');
  assert.match(gz.headers.vary ?? '', /accept-encoding/i);
  const cssRaw = zlib.gunzipSync(gz.rawPayload).toString('utf8');
  assert.ok(cssRaw.includes('toolbar'), 'gzip-inhoud is geldige css');
  const br = await app.inject({ url: '/js/core.js', headers: { 'accept-encoding': 'br' } });
  assert.equal(br.headers['content-encoding'], 'br');
  const jsRaw = zlib.brotliDecompressSync(br.rawPayload).toString('utf8');
  assert.ok(jsRaw.includes('const VERSION'), 'brotli-inhoud is geldige js');
  assert.ok(br.rawPayload.length < jsRaw.length / 2, 'compressie levert echt winst op');
  await app.close();
});

test('conditional GET levert 304 zonder body', async () => {
  const app = await makeApp();
  const first = await app.inject({ url: '/fonts/quicksand.woff2' });
  const res = await app.inject({ url: '/fonts/quicksand.woff2', headers: { 'if-none-match': first.headers.etag } });
  assert.equal(res.statusCode, 304);
  assert.equal(res.rawPayload.length, 0);
  await app.close();
});

test('resolveAppVersion geeft de echte versie door en valt lokaal nooit stale terug', () => {
  assert.equal(resolveAppVersion({ APP_VERSION: '0.4.0-beta' }), '0.4.0-beta');
  const a = resolveAppVersion({});
  const b = resolveAppVersion({ APP_VERSION: 'dev' });
  assert.match(a, /^dev-\d+$/);
  assert.match(b, /^dev-\d+$/);
});

test('index.html: elk script heeft defer + cache-busting, font-preload blijft ongeversioneerd', async () => {
  const [html, server] = await Promise.all([
    readFile(join(publicRoot, 'index.html'), 'utf8'),
    readFile(join(__dirname, '..', 'src', 'server.js'), 'utf8'),
  ]);
  const scripts = [...html.matchAll(/<script [^>]*src="([^"]+)"[^>]*>/g)];
  assert.ok(scripts.length >= 30, 'alle app-scripts staan in index.html');
  for (const [tag, src] of scripts) {
    assert.match(src, /\?v=__V__$/, `script zonder cache-busting: ${src}`);
    assert.match(tag, / defer/, `script zonder defer: ${src}`);
  }
  assert.match(html, /href="css\/teach\.css\?v=__V__"/);
  /* de preload-URL moet byte-gelijk blijven aan de url() in teach.css,
     anders downloadt de browser het font dubbel */
  assert.match(html, /rel="preload" href="fonts\/quicksand\.woff2" /);
  /* hook-volgorde: compress moet vóór de api- en frontend-registraties staan */
  assert.ok(server.indexOf('fastifyCompress') < server.indexOf('register(api'),
    'compress hoort vóór de api-registratie');
  assert.ok(server.indexOf('fastifyCompress') < server.indexOf('registerFrontend(app'),
    'compress hoort vóór de frontend-registratie');
});