install.test.mjs RawHistoryFolder

1// Tests of the install block of static/js/ermite.js (ermiteInstall): the
2// service worker registration. Run with
3//   node --test 'internal/adapters/web/jstest/*.test.mjs'
4import assert from 'node:assert/strict';
5import { readFileSync } from 'node:fs';
6import { test } from 'node:test';
7import { installDom } from './dom.mjs';
8
9const doc = installDom();
10const setNavigator = (v) => Object.defineProperty(globalThis, 'navigator', { value: v, configurable: true, writable: true });
11const listeners = {};
12globalThis.addEventListener = (type, fn) => { listeners[type] = fn; };
13doc.readyState = 'loading';
14const registered = [];
15setNavigator({ serviceWorker: { register: async (url, opts) => { registered.push([url, opts]); return {}; } } });
16
17// Only the ermiteInstall block is evaluated: the rest needs a page.
18const src = readFileSync(new URL('../static/js/ermite.js', import.meta.url), 'utf8');
19const start = src.indexOf('  window.ermiteInstall = ');
20const end = src.indexOf('  })();', start) + '  })();'.length;
21new Function(src.slice(start, end))();
22const I = window.ermiteInstall;
23
24test('the service worker is registered at the root scope once the page has loaded', async () => {
25  assert.equal(registered.length, 0, 'not before load');
26  await listeners.load();
27  assert.deepEqual(registered, [['/-/sw.js', { scope: '/' }]]);
28});
29
30test('a refused registration is not an error', async () => {
31  setNavigator({ serviceWorker: { register: () => Promise.reject(new Error('insecure')) } });
32  assert.equal(await I.register(), null);
33  setNavigator({});
34  assert.equal(await I.register(), null);
35});
36
37test('the page leaves the browser its own install offer', () => {
38  assert.equal(listeners.beforeinstallprompt, undefined, 'no preventDefault on beforeinstallprompt');
39});