feat: stabilize social backend contracts

src/modules/notifications/notifications.service.spec.ts

@@ -47,6 +47,7 @@ describe('NotificationsService', () => {
 
     await expect(service.markAllRead('user-1')).resolves.toEqual({
       message: 'All notifications marked as read',
+      modifiedCount: 4,
       updatedCount: 4,
       unreadCount: 2,
     });
@@ -70,4 +71,68 @@ describe('NotificationsService', () => {
     await expect(service.markRead('user-1', 'invalid-id')).rejects.toBeInstanceOf(NotFoundException);
     expect(notificationsRepository.markRead).not.toHaveBeenCalled();
   });
+
+  it('returns total unread count for the current user in the notifications list', async () => {
+    const notificationsRepository = {
+      findMine: jest.fn().mockResolvedValue([{ id: 'notification-1' }]),
+      countMine: jest.fn().mockResolvedValue(30),
+      countUnread: jest.fn().mockResolvedValue(7),
+    };
+    const notificationsGateway = {
+      emitUnreadCount: jest.fn(),
+    };
+
+    const service = new NotificationsService(
+      notificationsRepository as any,
+      notificationsGateway as any,
+    );
+
+    await expect(
+      service.getMine('507f1f77bcf86cd799439011', {
+        page: 1,
+        limit: 20,
+        sortOrder: 'desc' as any,
+      }),
+    ).resolves.toMatchObject({
+      count: 1,
+      page: 1,
+      limit: 20,
+      total: 30,
+      unreadCount: 7,
+      pagination: {
+        mode: 'offset',
+        hasNextPage: true,
+      },
+    });
+    expect(notificationsRepository.countUnread).toHaveBeenCalledWith('507f1f77bcf86cd799439011');
+  });
+
+  it('creates system notifications with system resource mapping when requested', async () => {
+    const notificationsRepository = {
+      create: jest.fn().mockResolvedValue({ toJSON: () => ({ _id: 'notification-1' }) }),
+      countUnread: jest.fn().mockResolvedValue(1),
+    };
+    const notificationsGateway = {
+      emitCreated: jest.fn(),
+    };
+
+    const service = new NotificationsService(
+      notificationsRepository as any,
+      notificationsGateway as any,
+    );
+
+    await service.create({
+      actorId: '507f1f77bcf86cd799439011',
+      recipientId: '507f191e810c19729de860ea',
+      type: 'system',
+    });
+
+    expect(notificationsRepository.create).toHaveBeenCalledWith(
+      expect.objectContaining({
+        type: 'system',
+        resourceType: 'system',
+        deepLink: '',
+      }),
+    );
+  });
 });