Fix test failures: update mocks and assertions for new features

- Add SpotifyRateLimitError to spotify mock in tracks route test
- Add missing date fields (createdAt, addedAt) in playlists route test
- Add notifyCircleMembers to notifications mock
- Update notification-prefs test to expect 7 types (added newSwaplist)

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: GraysonCAdams

src/app/api/playlists/[playlistId]/tracks/route.test.ts

@@ -36,6 +36,16 @@ vi.mock('@/lib/spotify', () => ({
       this.circleId = circleId;
     }
   },
+  SpotifyRateLimitError: class SpotifyRateLimitError extends Error {
+    path: string;
+    retryAfterSeconds: number;
+    constructor(path: string, retryAfterSeconds: number) {
+      super(`Spotify rate limit on ${path} — retry after ${retryAfterSeconds}s`);
+      this.name = 'SpotifyRateLimitError';
+      this.path = path;
+      this.retryAfterSeconds = retryAfterSeconds;
+    }
+  },
 }));
 
 vi.mock('@/lib/rate-limit', () => ({

src/app/api/playlists/__tests__/route.test.ts

@@ -73,7 +73,10 @@ vi.mock('@/lib/utils', () => ({
 }));
 
 // Mock notifications and other side effects
-vi.mock('@/lib/notifications', () => ({ notifyPlaylistMembers: vi.fn() }));
+vi.mock('@/lib/notifications', () => ({
+  notifyPlaylistMembers: vi.fn(),
+  notifyCircleMembers: vi.fn(),
+}));
 vi.mock('@/lib/playlist-sort', () => ({ sortPlaylistTracks: vi.fn() }));
 vi.mock('@/lib/polling', () => ({ setAutoReaction: vi.fn() }));
 vi.mock('@/lib/logger', () => ({
@@ -232,20 +235,24 @@ describe('GET /api/playlists', () => {
               },
             },
           ],
+          createdAt: new Date('2025-01-01T00:00:00Z'),
           tracks: [
             {
               spotifyTrackId: 'track-1',
               addedByUserId: 'user-2',
+              addedAt: new Date('2025-01-02T00:00:00Z'),
               removedAt: null,
             },
             {
               spotifyTrackId: 'track-2',
               addedByUserId: 'user-1',
+              addedAt: new Date('2025-01-03T00:00:00Z'),
               removedAt: null,
             },
             {
               spotifyTrackId: 'track-3',
               addedByUserId: 'user-2',
+              addedAt: new Date('2025-01-04T00:00:00Z'),
               removedAt: new Date(), // removed track
             },
           ],

src/lib/notification-prefs.test.ts

@@ -141,9 +141,10 @@ describe('DEFAULT_NOTIFICATION_PREFS', () => {
 });
 
 describe('NOTIFICATION_TYPES', () => {
-  it('contains all six notification types', () => {
-    expect(NOTIFICATION_TYPES).toHaveLength(6);
+  it('contains all seven notification types', () => {
+    expect(NOTIFICATION_TYPES).toHaveLength(7);
     expect(NOTIFICATION_TYPES).toContain('newTrack');
+    expect(NOTIFICATION_TYPES).toContain('newSwaplist');
     expect(NOTIFICATION_TYPES).toContain('memberJoined');
     expect(NOTIFICATION_TYPES).toContain('reactions');
     expect(NOTIFICATION_TYPES).toContain('trackRemoved');