release: v0.20.0

app/__tests__/not-found-metadata.test.ts

@@ -0,0 +1,29 @@
+import { describe, it, expect, vi } from 'vitest';
+
+/**
+ * A 404 decided before streaming — by proxy.ts, or by a page calling
+ * notFound() outside any Suspense boundary — is rendered from app/not-found.tsx
+ * inside the root layout, and Next takes its metadata from the layouts and
+ * that file, never from the page. Without metadata of its own the tab showed
+ * the bare site title, and the layout's `index, follow` sat next to Next's
+ * `noindex`; the soft-404 path meanwhile read "Not found".
+ */
+
+vi.mock('@/lib/i18n/server', async () => {
+  const { getDictionary } = await import('@/lib/i18n');
+  return { getServerDictionary: () => getDictionary('de') };
+});
+
+import * as notFoundModule from '../not-found';
+import { getDictionary } from '@/lib/i18n';
+
+describe('app/not-found.tsx metadata', () => {
+  it('titles a hard 404 from the dictionary and drops the layout robots tag', async () => {
+    const { generateMetadata } = notFoundModule as { generateMetadata?: () => unknown };
+    expect(typeof generateMetadata).toBe('function');
+    expect(await generateMetadata!()).toEqual({
+      title: getDictionary('de').error.notFoundTitle,
+      robots: null,
+    });
+  });
+});