school_compare/nextjs-app/__tests__/app/placeMetadata.test.ts

import { generateMetadata as placeMeta } from '@/app/(frontend)/schools/[place]/page';

jest.mock('@/lib/places', () => ({
  ...jest.requireActual('@/lib/places'),
  fetchPlace: jest.fn(async (kind: string, slug: string) =>
    slug === 'atlantis' ? null : ({
      place: { kind, slug, name: 'Brentwood', count: 29,
               parent_authority: 'Essex' },
      schools: [], averages: { rwm_expected_pct: 63, attainment_8_score: null },
    })),
  fetchPlaces: jest.fn(async () => []),
}));

describe('place page metadata', () => {
  it('titles the page the way the place is searched', async () => {
    const m = await placeMeta({ params: Promise.resolve({ place: 'brentwood' }) });
    expect((m.title as { absolute: string }).absolute).toMatch(/schools in brentwood/i);
  });

  it('canonicalises to its own path on the www host', async () => {
    const m = await placeMeta({ params: Promise.resolve({ place: 'brentwood' }) });
    expect(m.alternates?.canonical)
      .toBe('https://www.schoolcompare.co.uk/schools/brentwood');
  });

  it('opts out of the layout template, which would double the brand', () => {
    // The root layout appends '| schoolcompare' to a plain string title, and
    // these titles already carry it — every place page shipped reading
    // '... | schoolcompare | schoolcompare' until this was made absolute.
    return placeMeta({ params: Promise.resolve({ place: 'brentwood' }) })
      .then((m) => {
        expect(typeof m.title).toBe('object');
        expect((m.title as { absolute: string }).absolute)
          .not.toMatch(/schoolcompare.*schoolcompare/);
      });
  });

  it('an unknown place gets a not-found title rather than inventing one', async () => {
    const m = await placeMeta({ params: Promise.resolve({ place: 'atlantis' }) });
    expect(m.title).toMatch(/not found/i);
  });
});