test(metadata): the exports-entry control counts the new view-container-name entry

Claude-Session: https://claude.ai/code/session_01DDZNkDVwPQnevTFcYE47H3
Co-authored-by: Claude <noreply@anthropic.com>

Author: claude

packages/metadata/src/serializers/typescript-serializer-annotation.test.ts

@@ -168,7 +168,9 @@ describe('TypeScriptSerializer annotation, per metadata type', () => {
   it('no exports entry of the package re-exports the internal channel', async () => {
     // Control: the name is spelled right, so the absences below can fail.
     expect(Object.keys(await import('./typescript-serializer.js'))).toContain('serializeTypeScriptForMetadataType');
-    expect(EXPORT_ENTRY_SOURCES.length).toBe(5);
+    // Six since `./view-container-name` (#21412): the count is the control
+    // that the loop below visits every entry, so a new entry moves it here.
+    expect(EXPORT_ENTRY_SOURCES.length).toBe(6);
     for (const source of EXPORT_ENTRY_SOURCES) {
       const entry = (await import(source)) as Record<string, unknown>;
       expect(Object.keys(entry).length, source).toBeGreaterThan(0);