agent_backend/scripts/test-course-navigation.mjs

import assert from 'node:assert/strict';
import { courseHref, parseCourseQuery } from '../app/course-navigation.ts';
assert.equal(courseHref('api', '01'), '?lesson=01');
assert.deepEqual(parseCourseQuery('?lesson=01'), {
  module: 'api',
  lesson: '01',
});
const slugs = [
  'api',
  'database',
  'api-database',
  'tasks',
  'redis',
  'docker',
  'linux',
  'troubleshooting',
  'distributed',
  'review',
];
const urls = new Set();
for (const slug of slugs) {
  const url = courseHref(slug, '01');
  urls.add(url);
  assert.deepEqual(parseCourseQuery(url), { module: slug, lesson: '01' });
  assert.deepEqual(parseCourseQuery(courseHref(slug)), {
    module: slug,
    lesson: undefined,
  });
}
assert.equal(urls.size, 10, 'same lesson IDs must not collide across modules');
assert.deepEqual(parseCourseQuery(''), { module: 'home', lesson: undefined });
assert.deepEqual(parseCourseQuery(courseHref('home')), {
  module: 'home',
  lesson: undefined,
});
assert.equal(courseHref('home'), '?');
assert.deepEqual(parseCourseQuery('?module=api'), {
  module: 'api',
  lesson: undefined,
});
assert.deepEqual(parseCourseQuery('?module=home&lesson=01'), {
  module: 'home',
  lesson: '01',
});
assert.deepEqual(parseCourseQuery('?module=database&lesson=99'), {
  module: 'database',
  lesson: '99',
});
assert.equal(
  courseHref('tasks', '01&module=api'),
  '?module=tasks&lesson=01%26module%3Dapi',
);
console.log(
  'Course navigation: homepage, legacy links, 10 module round-trips, overview routes and query encoding passed.',
);