Test the real build end to end

How to do it

In the test, start the built app and call it from outside, over HTTP or its command line. For a website, fetch every page and file. Check one title and one h1, the canonical link and the description length. Check that JSON-LD parses, and check security headers and CSP hashes. Check status codes, redirects, caching and compression. Check robots.txt, the sitemap (every URL answers 200), Markdown copies, well-known files and feeds. For more depth, see the testing playbook.

Example

import test from 'node:test';
import assert from 'node:assert/strict';
const base = 'http://localhost:8080';

test('every sitemap URL answers 200 with one h1', async () => {
  const xml = await (await fetch(base + '/sitemap.xml')).text();
  for (const [, loc] of xml.matchAll(/<loc>https:\/\/example\.com([^<]*)<\/loc>/g)) {
    const res = await fetch(base + loc);
    assert.equal(res.status, 200, loc);
    assert.ok(res.headers.get('content-security-policy'), loc);
    assert.equal((await res.text()).match(/<h1[\s>]/g)?.length, 1, loc);
  }
});

How to check

The suite runs in the container build and before every deploy. A failure stops both.