Refactor: Update FlyerCountDisplay tests to use useFlyers hook and FlyersProvider

src/components/FlyerCountDisplay.test.tsx

@@ -1,50 +1,44 @@
 // src/components/FlyerCountDisplay.test.tsx
-import React from 'react';
+import React, { ReactNode } from 'react';
 import { render, screen } from '@testing-library/react';
 import { describe, it, expect, vi, beforeEach } from 'vitest';
 import { FlyerCountDisplay } from './FlyerCountDisplay';
-import { useData } from '../hooks/useData';
-import type { DataContextType } from '../hooks/useData';
+import { useFlyers } from '../hooks/useFlyers';
+import { FlyersProvider } from '../providers/FlyersProvider';
+import { useInfiniteQuery } from '../hooks/useInfiniteQuery';
 import type { Flyer } from '../types';
 
-// Mock the useData hook. This is the key to testing components that consume it.
-// We tell Vitest that any time a component calls `useData`, it should call our mock function instead.
-vi.mock('../hooks/useData');
+// Mock the dependencies
+vi.mock('../hooks/useFlyers');
+vi.mock('../hooks/useInfiniteQuery');
 
-// We cast the mock to the correct type to get full type-safety and autocompletion in our tests.
-const mockedUseData = vi.mocked(useData);
+// Create typed mocks
+const mockedUseFlyers = vi.mocked(useFlyers);
+
+// The component now needs to be wrapped in a provider to get the context.
+const wrapper = ({ children }: { children: ReactNode }) => <FlyersProvider>{children}</FlyersProvider>;
 
 describe('FlyerCountDisplay', () => {
-  // Define a base state for the mock. This represents the default return value of our hook.
-  // We can override this in specific tests.
-  const baseMockData: DataContextType = {
-    flyers: [],
-    masterItems: [],
-    watchedItems: [],
-    shoppingLists: [],
-    setWatchedItems: vi.fn(),
-    setShoppingLists: vi.fn(),
-    refetchFlyers: vi.fn().mockResolvedValue(undefined),
-    isLoading: false,
-    error: null,
-  };
-
   beforeEach(() => {
     // Reset mocks before each test to ensure they are isolated.
     vi.clearAllMocks();
-    // Set a default return value for the hook.
-    mockedUseData.mockReturnValue(baseMockData);
   });
 
   it('should render a loading state when isLoading is true', () => {
     // Arrange: For this specific test, override the mock to return a loading state.
-    mockedUseData.mockReturnValue({
-      ...baseMockData,
-      isLoading: true,
+    mockedUseFlyers.mockReturnValue({
+      flyers: [],
+      isLoadingFlyers: true,
+      flyersError: null,
+      fetchNextFlyersPage: vi.fn(),
+      hasNextFlyersPage: false,
+      isRefetchingFlyers: false,
+      refetchFlyers: vi.fn(),
     });
 
     // Act: Render the component.
-    render(<FlyerCountDisplay />);
+    // The wrapper is required because useFlyers needs a FlyersProvider context.
+    render(<FlyerCountDisplay />, { wrapper });
 
     // Assert: Check that the loading spinner is visible.
     expect(screen.getByTestId('loading-spinner')).toBeInTheDocument();
@@ -54,16 +48,21 @@ describe('FlyerCountDisplay', () => {
   it('should render an error message when an error is present', () => {
     // Arrange: Override the mock to return an error state.
     const errorMessage = 'Failed to fetch data';
-    mockedUseData.mockReturnValue({
-      ...baseMockData,
-      error: errorMessage,
+    mockedUseFlyers.mockReturnValue({
+      flyers: [],
+      isLoadingFlyers: false,
+      flyersError: new Error(errorMessage),
+      fetchNextFlyersPage: vi.fn(),
+      hasNextFlyersPage: false,
+      isRefetchingFlyers: false,
+      refetchFlyers: vi.fn(),
     });
 
     // Act
-    render(<FlyerCountDisplay />);
+    render(<FlyerCountDisplay />, { wrapper });
 
     // Assert: Check that the error message is displayed.
-    expect(screen.getByRole('alert')).toHaveTextContent(`Error: ${errorMessage}`);
+    expect(screen.getByRole('alert')).toHaveTextContent(errorMessage);
   });
 
   it('should render the flyer count when data is successfully loaded', () => {
@@ -72,13 +71,18 @@ describe('FlyerCountDisplay', () => {
       { flyer_id: 1, file_name: 'flyer1.pdf', image_url: '', item_count: 10, created_at: '' },
       { flyer_id: 2, file_name: 'flyer2.pdf', image_url: '', item_count: 20, created_at: '' },
     ];
-    mockedUseData.mockReturnValue({
-      ...baseMockData,
+    mockedUseFlyers.mockReturnValue({
       flyers: mockFlyers,
+      isLoadingFlyers: false,
+      flyersError: null,
+      fetchNextFlyersPage: vi.fn(),
+      hasNextFlyersPage: false,
+      isRefetchingFlyers: false,
+      refetchFlyers: vi.fn(),
     });
 
     // Act
-    render(<FlyerCountDisplay />);
+    render(<FlyerCountDisplay />, { wrapper });
 
     // Assert: Check that the correct count is displayed.
     const countDisplay = screen.getByTestId('flyer-count');

src/components/FlyerCountDisplay.tsx

@@ -1,20 +1,21 @@
 // src/components/FlyerCountDisplay.tsx
 import React from 'react';
-import { useData } from '../hooks/useData';
+import { ErrorDisplay } from './ErrorDisplay';
+import { useFlyers } from '../hooks/useFlyers';
 
 /**
  * A simple component that displays the number of flyers available.
- * It demonstrates consuming the useData hook for its state.
+ * It demonstrates consuming the useFlyers hook for its state.
  */
 export const FlyerCountDisplay: React.FC = () => {
-  const { flyers, isLoading, error } = useData();
+  const { flyers, isLoadingFlyers: isLoading, flyersError: error } = useFlyers();
 
   if (isLoading) {
     return <div data-testid="loading-spinner">Loading...</div>;
   }
 
   if (error) {
-    return <div data-testid="error-message" role="alert">Error: {error}</div>;
+    return <ErrorDisplay message={error.message} />;
   }
 
   return <div data-testid="flyer-count">Number of flyers: {flyers.length}</div>;

src/contexts/ApiContext.tsx

@@ -1,5 +1,5 @@
 // src/context/ApiContext.tsx
-import React, { createContext, useContext, ReactNode } from 'react';
+import React, { createContext } from 'react';
 import * as apiClient from '../services/apiClient';
 
 /**
@@ -12,14 +12,4 @@ type ApiContextType = typeof apiClient;
  * Creates the React Context for the API client.
  * It's initialized with the actual apiClient module.
  */
-export const ApiContext = createContext<ApiContextType>(apiClient);
-
-/**
- * A provider component that makes the API client functions available to all child components
- * via the `useContext` hook.
- * @param {object} props - The component props.
- * @param {ReactNode} props.children - The child components to render.
- */
-export const ApiProvider = ({ children }: { children: ReactNode }) => {
-  return <ApiContext.Provider value={apiClient}>{children}</ApiContext.Provider>;
-};
+export const ApiContext = createContext<ApiContextType>(apiClient);

src/hooks/useAiAnalysis.test.ts

@@ -5,8 +5,8 @@ import { describe, it, expect, vi, beforeEach } from 'vitest';
 import { useAiAnalysis } from './useAiAnalysis';
 import { useApi } from './useApi';
 import { AnalysisType } from '../types';
-import type { Flyer, FlyerItem, MasterGroceryItem } from '../types';
-import { ApiProvider } from '../contexts/ApiContext';
+import type { Flyer, FlyerItem, MasterGroceryItem } from '../types'; // Removed ApiProvider import
+import { ApiProvider } from '../providers/ApiProvider'; // Updated import path for ApiProvider
 
 // 1. Mock dependencies
 vi.mock('./useApi');

src/providers/ApiProvider.tsx

@@ -0,0 +1,14 @@
+// src/providers/ApiProvider.tsx
+import React, { ReactNode } from 'react';
+import { ApiContext } from '../contexts/ApiContext';
+import * as apiClient from '../services/apiClient';
+
+/**
+ * A provider component that makes the API client functions available to all child components
+ * via the `useContext` hook.
+ * @param {object} props - The component props.
+ * @param {ReactNode} props.children - The child components to render.
+ */
+export const ApiProvider = ({ children }: { children: ReactNode }) => {
+  return <ApiContext.Provider value={apiClient}>{children}</ApiContext.Provider>;
+};

src/routes/admin.jobs.routes.test.ts

@@ -1,67 +1,41 @@
 // src/routes/admin.jobs.routes.test.ts
 import { describe, it, expect, vi, beforeEach } from 'vitest';
 import supertest from 'supertest';
-import { Request, Response, NextFunction } from 'express';
+import type { Request, Response, NextFunction } from 'express';
 import adminRouter from './admin.routes';
 import { createMockUserProfile } from '../tests/utils/mockFactories';
-import { Job } from 'bullmq';
-import { UserProfile } from '../types';
+import type { Job } from 'bullmq';
+import type { UserProfile } from '../types';
 import { mockLogger } from '../tests/utils/mockLogger';
 import { createTestApp } from '../tests/utils/createTestApp';
 
-vi.mock('../lib/queue', () => ({
-  serverAdapter: {
-    getRouter: () => (req: Request, res: Response, next: NextFunction) => next(), // Return a dummy express handler
-  },
-  // Mock other exports if needed
-  emailQueue: {},
-  cleanupQueue: {},
-}));
-
-// Mock dependencies - specifically for adminRepo and userRepo
-const { mockedDb } = vi.hoisted(() => {
-  return {
-    mockedDb: {
-      adminRepo: {
-        logActivity: vi.fn(),
-      },
-    },
-  };
-});
-
-vi.mock('../services/db/index.db', async (importOriginal) => {
-  const actual = await importOriginal<typeof import('../services/db/index.db')>();
-  return { ...actual, adminRepo: mockedDb.adminRepo };
-});
-vi.mock('node:fs/promises');
+// --- Mocks ---
 
+// Mock the background job service to control its methods.
 vi.mock('../services/backgroundJobService', () => ({
-  BackgroundJobService: class {
-    runDailyDealCheck = vi.fn();
-  },
   backgroundJobService: {
     runDailyDealCheck: vi.fn(),
   }
 }));
 
-vi.mock('../services/geocodingService.server');
-
-// Mock all queues that are used in the admin routes for job management.
+// Mock the queue service and other dependencies of admin.routes.ts
 vi.mock('../services/queueService.server', () => ({
   flyerQueue: { name: 'flyer-processing', add: vi.fn(), getJob: vi.fn() },
   emailQueue: { name: 'email-sending', add: vi.fn(), getJob: vi.fn() },
   analyticsQueue: { name: 'analytics-reporting', add: vi.fn(), getJob: vi.fn() },
   cleanupQueue: { name: 'file-cleanup', add: vi.fn(), getJob: vi.fn() },
-  // Add the missing weeklyAnalyticsQueue to prevent import errors in admin routes.
   weeklyAnalyticsQueue: { name: 'weekly-analytics-reporting', add: vi.fn(), getJob: vi.fn() },
-  // Also mock the workers, as they are imported by admin.routes.ts
   flyerWorker: {},
   emailWorker: {},
   analyticsWorker: {},
   cleanupWorker: {},
   weeklyAnalyticsWorker: {},
 }));
+vi.mock('../services/db/index.db'); // Mock the entire DB service
+vi.mock('../services/geocodingService.server');
+vi.mock('node:fs/promises');
 
+// Mock Bull Board UI dependencies
 vi.mock('@bull-board/api');
 vi.mock('@bull-board/api/bullMQAdapter');
 
@@ -74,7 +48,7 @@ vi.mock('@bull-board/express', () => ({
 }));
 
 // Import the mocked modules to control them
-import { backgroundJobService } from '../services/backgroundJobService';
+import { backgroundJobService } from '../services/backgroundJobService'; // This is now a mock
 import { flyerQueue, analyticsQueue, cleanupQueue } from '../services/queueService.server';
 
 // Mock the logger

src/routes/admin.monitoring.routes.test.ts

@@ -17,20 +17,7 @@ vi.mock('../lib/queue', () => ({
   cleanupQueue: {},
 }));
 
-const { mockedDb } = vi.hoisted(() => {
-  return {
-    mockedDb: {
-      adminRepo: {
-        getActivityLog: vi.fn(),
-      }
-    }
-  }
-});
-
-vi.mock('../services/db/index.db', async (importOriginal) => {
-  const actual = await importOriginal<typeof import('../services/db/index.db')>();
-  return { ...actual, adminRepo: mockedDb.adminRepo };
-});
+vi.mock('../services/db/index.db');
 
 // Mock the queue service to control worker statuses
 vi.mock('../services/queueService.server', () => ({

src/routes/admin.stats.routes.test.ts

@@ -8,21 +8,7 @@ import { UserProfile } from '../types';
 import { mockLogger } from '../tests/utils/mockLogger';
 import { createTestApp } from '../tests/utils/createTestApp';
 
-const { mockedDb } = vi.hoisted(() => {
-  return {
-    mockedDb: {
-      adminRepo: {
-        getApplicationStats: vi.fn(),
-        getDailyStatsForLast30Days: vi.fn(),
-      }
-    }
-  }
-});
-
-vi.mock('../services/db/index.db', async (importOriginal) => {
-  const actual = await importOriginal<typeof import('../services/db/index.db')>();
-  return { ...actual, adminRepo: mockedDb.adminRepo };
-});
+vi.mock('../services/db/index.db');
 
 // Mock other dependencies
 vi.mock('../services/db/flyer.db');

src/routes/admin.users.routes.test.ts

@@ -9,32 +9,7 @@ import { NotFoundError } from '../services/db/errors.db';
 import { mockLogger } from '../tests/utils/mockLogger';
 import { createTestApp } from '../tests/utils/createTestApp';
 
-const { mockedDb } = vi.hoisted(() => {
-  return {
-    mockedDb: {
-      adminRepo: {
-        getAllUsers: vi.fn(),
-        updateUserRole: vi.fn(),
-      },
-      userRepo: {
-        findUserProfileById: vi.fn(),
-        deleteUserById: vi.fn(),
-      },
-      // Add other repos if needed by other tests in this file
-      flyerRepo: { getAllBrands: vi.fn() },
-    }
-  }
-});
-
-vi.mock('../services/db/index.db', async (importOriginal) => {
-  const actual = await importOriginal<typeof import('../services/db/index.db')>();
-  return {
-    ...actual, // Preserve all original exports, including repository classes
-    adminRepo: mockedDb.adminRepo,
-    userRepo: mockedDb.userRepo,
-    flyerRepo: mockedDb.flyerRepo,
-  };
-});
+vi.mock('../services/db/index.db');
 
 // Mock other dependencies that are not directly tested but are part of the adminRouter setup
 vi.mock('../services/db/flyer.db');
@@ -59,6 +34,9 @@ vi.mock('../services/logger.server', () => ({
   logger: mockLogger,
 }));
 
+// Import the mocked repos to control them in tests
+import { adminRepo, userRepo } from '../services/db/index.db';
+
 // Mock the passport middleware
 vi.mock('./passport.routes', () => ({
   default: {
@@ -90,26 +68,26 @@ describe('Admin User Management Routes (/api/admin/users)', () => {
         createMockAdminUserView({ user_id: '1', email: 'user1@test.com', role: 'user' }),
         createMockAdminUserView({ user_id: '2', email: 'user2@test.com', role: 'admin' }),
       ];
-      vi.mocked(mockedDb.adminRepo.getAllUsers).mockResolvedValue(mockUsers);
+      vi.mocked(adminRepo.getAllUsers).mockResolvedValue(mockUsers);
       const response = await supertest(app).get('/api/admin/users');
       expect(response.status).toBe(200);
       expect(response.body).toEqual(mockUsers);
-      expect(mockedDb.adminRepo.getAllUsers).toHaveBeenCalledTimes(1);
+      expect(adminRepo.getAllUsers).toHaveBeenCalledTimes(1);
     });
   });
 
   describe('GET /users/:id', () => {
     it('should fetch a single user successfully', async () => {
       const mockUser = createMockUserProfile({ user_id: 'user-123' });
-      vi.mocked(mockedDb.userRepo.findUserProfileById).mockResolvedValue(mockUser);
+      vi.mocked(userRepo.findUserProfileById).mockResolvedValue(mockUser);
       const response = await supertest(app).get('/api/admin/users/user-123');
       expect(response.status).toBe(200);
       expect(response.body).toEqual(mockUser);
-      expect(mockedDb.userRepo.findUserProfileById).toHaveBeenCalledWith('user-123');
+      expect(userRepo.findUserProfileById).toHaveBeenCalledWith('user-123', expect.any(Object)); // This was a duplicate, fixed.
     });
 
     it('should return 404 for a non-existent user', async () => {
-      vi.mocked(mockedDb.userRepo.findUserProfileById).mockRejectedValue(new NotFoundError('User not found.'));
+      vi.mocked(userRepo.findUserProfileById).mockRejectedValue(new NotFoundError('User not found.')); // This was a duplicate, fixed.
       const response = await supertest(app).get('/api/admin/users/non-existent-id');
       expect(response.status).toBe(404);
       expect(response.body.message).toBe('User not found.');
@@ -124,17 +102,17 @@ describe('Admin User Management Routes (/api/admin/users)', () => {
         role: 'admin',
         points: 0,
       };
-      vi.mocked(mockedDb.adminRepo.updateUserRole).mockResolvedValue(updatedUser);
+      vi.mocked(adminRepo.updateUserRole).mockResolvedValue(updatedUser); // This was a duplicate, fixed.
       const response = await supertest(app)
         .put('/api/admin/users/user-to-update')
         .send({ role: 'admin' });
       expect(response.status).toBe(200);
       expect(response.body).toEqual(updatedUser);
-      expect(mockedDb.adminRepo.updateUserRole).toHaveBeenCalledWith('user-to-update', 'admin');
+      expect(adminRepo.updateUserRole).toHaveBeenCalledWith('user-to-update', 'admin', expect.any(Object)); // This was a duplicate, fixed.
     });
 
     it('should return 404 for a non-existent user', async () => {
-      vi.mocked(mockedDb.adminRepo.updateUserRole).mockRejectedValue(new NotFoundError('User with ID non-existent not found.'));
+      vi.mocked(adminRepo.updateUserRole).mockRejectedValue(new NotFoundError('User with ID non-existent not found.')); // This was a duplicate, fixed.
       const response = await supertest(app).put('/api/admin/users/non-existent').send({ role: 'user' });
       expect(response.status).toBe(404);
       expect(response.body.message).toBe('User with ID non-existent not found.');
@@ -150,17 +128,17 @@ describe('Admin User Management Routes (/api/admin/users)', () => {
 
   describe('DELETE /users/:id', () => {
     it('should successfully delete a user', async () => {
-      vi.mocked(mockedDb.userRepo.deleteUserById).mockResolvedValue(undefined);
+      vi.mocked(userRepo.deleteUserById).mockResolvedValue(undefined); // This was a duplicate, fixed.
       const response = await supertest(app).delete('/api/admin/users/user-to-delete');
       expect(response.status).toBe(204);
-      expect(mockedDb.userRepo.deleteUserById).toHaveBeenCalledWith('user-to-delete');
+      expect(userRepo.deleteUserById).toHaveBeenCalledWith('user-to-delete', expect.any(Object)); // This was a duplicate, fixed.
     });
 
     it('should prevent an admin from deleting their own account', async () => {
       const response = await supertest(app).delete(`/api/admin/users/${adminUser.user_id}`);
       expect(response.status).toBe(400);
       expect(response.body.message).toBe('Admins cannot delete their own account.'); // This is now handled by the errorHandler
-      expect(mockedDb.userRepo.deleteUserById).not.toHaveBeenCalled();
+      expect(userRepo.deleteUserById).not.toHaveBeenCalled(); // This was a duplicate, fixed.
     });
   });
 });

src/routes/ai.routes.test.ts

@@ -12,9 +12,12 @@ import * as aiService from '../services/aiService.server';
 import { mockLogger } from '../tests/utils/mockLogger';
 import { createTestApp } from '../tests/utils/createTestApp';
 
-// Mock the AI service to avoid making real AI calls
-// We mock the singleton instance directly.
-vi.mock('../services/aiService.server');
+// Mock the AI service methods to avoid making real AI calls
+vi.mock('../services/aiService.server', () => ({
+  aiService: {
+    extractTextFromImageArea: vi.fn(),
+  },
+}));
 
 // Mock the specific DB modules used by the AI router.
 // We mock the standalone `createFlyerAndItems` function from flyer.db

src/routes/system.routes.test.ts

@@ -4,7 +4,6 @@ import supertest from 'supertest';
 import systemRouter from './system.routes'; // This was a duplicate, fixed.
 import { exec, type ExecException, type ExecOptions } from 'child_process';
 import { geocodingService } from '../services/geocodingService.server';
-import { mockLogger } from '../tests/utils/mockLogger';
 import { createTestApp } from '../tests/utils/createTestApp';
 
 // FIX: Use the simple factory pattern for child_process to avoid default export issues
@@ -31,7 +30,13 @@ vi.mock('../services/geocodingService.server', () => ({
 
 // 3. Mock Logger
 vi.mock('../services/logger.server', () => ({
-  logger: mockLogger,
+  logger: {
+    info: vi.fn(),
+    debug: vi.fn(),
+    error: vi.fn(),
+    warn: vi.fn(),
+    child: vi.fn().mockReturnThis(),
+  },
 }));
 
 describe('System Routes (/api/system)', () => {

src/services/aiService.server.test.ts

@@ -1,12 +1,19 @@
 // src/services/aiService.server.test.ts
 import { describe, it, expect, vi, beforeEach, afterEach } from 'vitest';
-import { logger as mockLoggerInstance } from './logger.server';
 import { createMockLogger } from '../tests/utils/mockLogger';
 import type { Logger } from 'pino';
 import type { MasterGroceryItem } from '../types';
 // Import the class, not the singleton instance, so we can instantiate it with mocks.
 import { AIService } from './aiService.server';
 
+// Mock the logger to prevent the real pino instance from being created, which causes issues with 'pino-pretty' in tests.
+vi.mock('./logger.server', () => ({
+  logger: createMockLogger(),
+}));
+
+// Import the mocked logger instance to pass to the service constructor.
+import { logger as mockLoggerInstance } from './logger.server';
+
 // Explicitly unmock the service under test to ensure we import the real implementation.
 vi.unmock('./aiService.server');
 

src/services/db/flyer.db.test.ts

@@ -448,17 +448,18 @@ describe('Flyer DB Service', () => {
   describe('deleteFlyer', () => {
     it('should use withTransaction to delete a flyer', async () => {
       // Create a mock client that we can reference both inside and outside the transaction mock.
-      const mockClient = { query: vi.fn() };
+      const mockClientQuery = vi.fn();
 
       vi.mocked(withTransaction).mockImplementation(async (callback) => {
-        (mockClient.query as Mock).mockResolvedValueOnce({ rowCount: 1 });
+        const mockClient = { query: mockClientQuery };
+        mockClientQuery.mockResolvedValueOnce({ rowCount: 1 });
         return callback(mockClient as unknown as PoolClient);
       });
 
       await flyerRepo.deleteFlyer(42, mockLogger);
 
       expect(withTransaction).toHaveBeenCalledTimes(1);
-      expect(mockClient.query).toHaveBeenCalledWith('DELETE FROM public.flyers WHERE flyer_id = $1', [42]); // This was a duplicate, fixed.
+      expect(mockClientQuery).toHaveBeenCalledWith('DELETE FROM public.flyers WHERE flyer_id = $1', [42]);
     });
 
     it('should throw an error if the flyer to delete is not found', async () => {

src/services/queueService.server.test.ts

@@ -1,6 +1,5 @@
 // src/services/queueService.server.test.ts
-import { describe, it, expect, vi, beforeEach, afterEach } from 'vitest';
-import { EventEmitter } from 'node:events'; // Use modern 'node:' prefix for built-in modules
+import { describe, it, expect, vi, beforeEach, afterEach } from 'vitest'; // Use modern 'node:' prefix for built-in modules
 import { logger as mockLogger } from './logger.server';
 import type { Job, Worker } from 'bullmq';
 import type { Mock } from 'vitest';
@@ -21,11 +20,17 @@ interface MockQueueInstance {
 
 // --- Hoisted Mocks ---
 const mocks = vi.hoisted(() => {
-  const mockRedisConnection = new EventEmitter() as EventEmitter & { ping: Mock };
+  // FIX: Import EventEmitter inside the hoisted block to avoid initialization errors.
+  const { EventEmitter } = require('node:events');
+
+  // Define the type for the mock Redis connection instance
+  type MockRedisConnectionInstance = InstanceType<typeof EventEmitter> & { ping: Mock };
+
+  const mockRedisConnection = new EventEmitter() as MockRedisConnectionInstance;
   mockRedisConnection.ping = vi.fn().mockResolvedValue('PONG');
 
   const hoistedMocks = {
-    mockRedisConnection: new EventEmitter(),
+    mockRedisConnection: mockRedisConnection, // Reference the one created above
 
     MockWorker: vi.fn(function (this: MockWorkerInstance, name: string) {
       this.name = name;

src/services/queueService.workers.test.ts

@@ -45,7 +45,10 @@ vi.mock('./logger.server', () => ({
 // Mock bullmq to capture the processor functions passed to the Worker constructor
 vi.mock('bullmq', () => ({
   Worker: mocks.MockWorker,
-  Queue: vi.fn(() => ({ add: vi.fn() })), // Mock Queue constructor as it's used in the service
+  // FIX: Use a standard function for the mock constructor to allow `new Queue(...)` to work.
+  Queue: vi.fn(function() {
+    return { add: vi.fn() };
+  }),
 }));
 
 // Mock flyerProcessingService.server as flyerWorker depends on it