fix: convert all test files from jest to vitest and fix QBittorrentClient import

- Convert RTorrentClient.test.js to use vi.mock() instead of jest.mock()
- Convert QBittorrentClient.test.js to use vi.mock() instead of jest.mock()
- Convert SABnzbdClient.test.js to use vi.mock() instead of jest.mock()
- Convert TransmissionClient.test.js to use vi.mock() instead of jest.mock()
- Convert downloadClients.test.js to use vi.mock() instead of jest.mock()
- Convert integration/downloadClients.test.js to use vi.mock() instead of jest.mock()
- Fix legacy qbittorrent.test.js to import QBittorrentClient from new location
- Add getRtorrentInstances mock to downloadClients.test.js
- Add RTORRENT_INSTANCES to integration test environment variables

tests/unit/clients/QBittorrentClient.test.js

@@ -1,11 +1,12 @@
 // Copyright (c) 2026 Gordon Bolton. MIT License.
 const QBittorrentClient = require('../../../server/clients/QBittorrentClient');
 const axios = require('axios');
+const { vi } = require('vitest');
 
 // Mock axios
-jest.mock('axios');
-jest.mock('../../../server/utils/logger', () => ({
-  logToFile: jest.fn()
+vi.mock('axios');
+vi.mock('../../../server/utils/logger', () => ({
+  logToFile: vi.fn()
 }));
 
 describe('QBittorrentClient', () => {
@@ -22,9 +23,9 @@ describe('QBittorrentClient', () => {
     };
     
     client = new QBittorrentClient(mockConfig);
-    
+
     // Clear all mocks
-    jest.clearAllMocks();
+    vi.clearAllMocks();
   });
 
   describe('Constructor', () => {
@@ -89,11 +90,11 @@ describe('QBittorrentClient', () => {
   describe('Connection Test', () => {
     it('should test connection successfully', async () => {
       // Mock login success
-      client.login = jest.fn().mockResolvedValue(true);
-      
+      client.login = vi.fn().mockResolvedValue(true);
+
       // Mock version request
       const mockResponse = { data: 'v4.3.5' };
-      client.makeRequest = jest.fn().mockResolvedValue(mockResponse);
+      client.makeRequest = vi.fn().mockResolvedValue(mockResponse);
       
       const result = await client.testConnection();
       
@@ -102,7 +103,7 @@ describe('QBittorrentClient', () => {
     });
 
     it('should handle connection test failure', async () => {
-      client.login = jest.fn().mockRejectedValue(new Error('Auth failed'));
+      client.login = vi.fn().mockRejectedValue(new Error('Auth failed'));
       
       const result = await client.testConnection();
       
@@ -200,15 +201,15 @@ describe('QBittorrentClient', () => {
       const authError = {
         response: { status: 403 }
       };
-      
+
       // Second login attempt succeeds
-      client.login = jest.fn()
+      client.login = vi.fn()
         .mockResolvedValueOnce(false)
         .mockResolvedValueOnce(true);
-      
+
       // Retry request succeeds
       const successResponse = { data: 'success' };
-      axios.get = jest.fn()
+      axios.get = vi.fn()
         .mockRejectedValueOnce(authError)
         .mockResolvedValueOnce(successResponse);
       

tests/unit/clients/RTorrentClient.test.js

@@ -1,13 +1,14 @@
 // Copyright (c) 2026 Gordon Bolton. MIT License.
 const RTorrentClient = require('../../../server/clients/RTorrentClient');
 const xmlrpc = require('xmlrpc');
+const { vi } = require('vitest');
 
-jest.mock('xmlrpc', () => ({
-  createClient: jest.fn()
+vi.mock('xmlrpc', () => ({
+  createClient: vi.fn()
 }));
 
-jest.mock('../../../server/utils/logger', () => ({
-  logToFile: jest.fn()
+vi.mock('../../../server/utils/logger', () => ({
+  logToFile: vi.fn()
 }));
 
 describe('RTorrentClient', () => {
@@ -16,7 +17,7 @@ describe('RTorrentClient', () => {
   let mockMethodCall;
 
   beforeEach(() => {
-    mockMethodCall = jest.fn();
+    mockMethodCall = vi.fn();
     xmlrpc.createClient.mockReturnValue({
       methodCall: mockMethodCall
     });
@@ -30,7 +31,7 @@ describe('RTorrentClient', () => {
     };
 
     client = new RTorrentClient(mockConfig);
-    jest.clearAllMocks();
+    vi.clearAllMocks();
   });
 
   describe('Constructor', () => {

tests/unit/clients/SABnzbdClient.test.js

@@ -1,11 +1,12 @@
 // Copyright (c) 2026 Gordon Bolton. MIT License.
 const SABnzbdClient = require('../../../server/clients/SABnzbdClient');
 const axios = require('axios');
+const { vi } = require('vitest');
 
 // Mock axios
-jest.mock('axios');
-jest.mock('../../../server/utils/logger', () => ({
-  logToFile: jest.fn()
+vi.mock('axios');
+vi.mock('../../../server/utils/logger', () => ({
+  logToFile: vi.fn()
 }));
 
 describe('SABnzbdClient', () => {
@@ -23,7 +24,7 @@ describe('SABnzbdClient', () => {
     client = new SABnzbdClient(mockConfig);
     
     // Clear all mocks
-    jest.clearAllMocks();
+    vi.clearAllMocks();
   });
 
   describe('Constructor', () => {
@@ -42,7 +43,7 @@ describe('SABnzbdClient', () => {
         data: { version: '3.6.1' }
       };
       
-      client.makeRequest = jest.fn().mockResolvedValue(mockResponse);
+      client.makeRequest = vi.fn().mockResolvedValue(mockResponse);
       
       const result = await client.testConnection();
       
@@ -51,7 +52,7 @@ describe('SABnzbdClient', () => {
     });
 
     it('should handle connection test failure', async () => {
-      client.makeRequest = jest.fn().mockRejectedValue(new Error('Connection failed'));
+      client.makeRequest = vi.fn().mockRejectedValue(new Error('Connection failed'));
       
       const result = await client.testConnection();
       
@@ -244,7 +245,7 @@ describe('SABnzbdClient', () => {
         }
       };
 
-      client.makeRequest = jest.fn()
+      client.makeRequest = vi.fn()
         .mockResolvedValueOnce(mockQueueResponse)
         .mockResolvedValueOnce(mockHistoryResponse);
 
@@ -258,7 +259,7 @@ describe('SABnzbdClient', () => {
     });
 
     it('should handle API errors gracefully', async () => {
-      client.makeRequest = jest.fn().mockRejectedValue(new Error('API Error'));
+      client.makeRequest = vi.fn().mockRejectedValue(new Error('API Error'));
 
       const downloads = await client.getActiveDownloads();
 
@@ -280,7 +281,7 @@ describe('SABnzbdClient', () => {
         }
       };
 
-      client.makeRequest = jest.fn().mockResolvedValue(mockResponse);
+      client.makeRequest = vi.fn().mockResolvedValue(mockResponse);
 
       const status = await client.getClientStatus();
 
@@ -294,7 +295,7 @@ describe('SABnzbdClient', () => {
     });
 
     it('should handle status request errors', async () => {
-      client.makeRequest = jest.fn().mockRejectedValue(new Error('Status error'));
+      client.makeRequest = vi.fn().mockRejectedValue(new Error('Status error'));
 
       const status = await client.getClientStatus();
 

tests/unit/clients/TransmissionClient.test.js

@@ -1,11 +1,12 @@
 // Copyright (c) 2026 Gordon Bolton. MIT License.
 const TransmissionClient = require('../../../server/clients/TransmissionClient');
 const axios = require('axios');
+const { vi } = require('vitest');
 
 // Mock axios
-jest.mock('axios');
-jest.mock('../../../server/utils/logger', () => ({
-  logToFile: jest.fn()
+vi.mock('axios');
+vi.mock('../../../server/utils/logger', () => ({
+  logToFile: vi.fn()
 }));
 
 describe('TransmissionClient', () => {
@@ -24,7 +25,7 @@ describe('TransmissionClient', () => {
     client = new TransmissionClient(mockConfig);
     
     // Clear all mocks
-    jest.clearAllMocks();
+    vi.clearAllMocks();
   });
 
   describe('Constructor', () => {
@@ -44,7 +45,7 @@ describe('TransmissionClient', () => {
         data: { result: 'success', arguments: {} }
       };
       
-      client.makeRequest = jest.fn().mockResolvedValue(mockResponse);
+      client.makeRequest = vi.fn().mockResolvedValue(mockResponse);
       
       const result = await client.testConnection();
       
@@ -53,7 +54,7 @@ describe('TransmissionClient', () => {
     });
 
     it('should handle connection test failure', async () => {
-      client.makeRequest = jest.fn().mockRejectedValue(new Error('Connection failed'));
+      client.makeRequest = vi.fn().mockRejectedValue(new Error('Connection failed'));
       
       const result = await client.testConnection();
       
@@ -308,7 +309,7 @@ describe('TransmissionClient', () => {
         }
       };
 
-      client.makeRequest = jest.fn().mockResolvedValue(mockResponse);
+      client.makeRequest = vi.fn().mockResolvedValue(mockResponse);
 
       const downloads = await client.getActiveDownloads();
 
@@ -330,7 +331,7 @@ describe('TransmissionClient', () => {
     });
 
     it('should handle API errors gracefully', async () => {
-      client.makeRequest = jest.fn().mockRejectedValue(new Error('API Error'));
+      client.makeRequest = vi.fn().mockRejectedValue(new Error('API Error'));
 
       const downloads = await client.getActiveDownloads();
 
@@ -345,7 +346,7 @@ describe('TransmissionClient', () => {
         }
       };
 
-      client.makeRequest = jest.fn().mockResolvedValue(mockResponse);
+      client.makeRequest = vi.fn().mockResolvedValue(mockResponse);
 
       const downloads = await client.getActiveDownloads();
 
@@ -377,7 +378,7 @@ describe('TransmissionClient', () => {
         }
       };
 
-      client.makeRequest = jest.fn()
+      client.makeRequest = vi.fn()
         .mockResolvedValueOnce(mockSessionResponse)
         .mockResolvedValueOnce(mockStatsResponse);
 
@@ -392,7 +393,7 @@ describe('TransmissionClient', () => {
     });
 
     it('should handle status request errors', async () => {
-      client.makeRequest = jest.fn().mockRejectedValue(new Error('Status error'));
+      client.makeRequest = vi.fn().mockRejectedValue(new Error('Status error'));
 
       const status = await client.getClientStatus();
 

tests/unit/downloadClients.test.js

@@ -1,6 +1,6 @@
 // Copyright (c) 2026 Gordon Bolton. MIT License.
-const { 
-  DownloadClientRegistry, 
+const {
+  DownloadClientRegistry,
   registry,
   initializeClients,
   getAllClients,
@@ -11,55 +11,57 @@ const {
   testAllConnections,
   getAllClientStatuses
 } = require('../../server/utils/downloadClients');
+const { vi } = require('vitest');
 
 // Mock config and clients
-jest.mock('../../server/utils/config', () => ({
-  getSABnzbdInstances: jest.fn(),
-  getQbittorrentInstances: jest.fn(),
-  getTransmissionInstances: jest.fn()
+vi.mock('../../server/utils/config', () => ({
+  getSABnzbdInstances: vi.fn(),
+  getQbittorrentInstances: vi.fn(),
+  getTransmissionInstances: vi.fn(),
+  getRtorrentInstances: vi.fn()
 }));
 
-jest.mock('../../server/utils/logger', () => ({
-  logToFile: jest.fn()
+vi.mock('../../server/utils/logger', () => ({
+  logToFile: vi.fn()
 }));
 
-jest.mock('../../server/clients/SABnzbdClient', () => {
-  return jest.fn().mockImplementation((config) => ({
+vi.mock('../../server/clients/SABnzbdClient', () => {
+  return vi.fn().mockImplementation((config) => ({
     getClientType: () => 'sabnzbd',
     getInstanceId: () => config.id,
     name: config.name,
-    getActiveDownloads: jest.fn().mockResolvedValue([
+    getActiveDownloads: vi.fn().mockResolvedValue([
       { id: 'sab1', title: 'SAB Download 1', client: 'sabnzbd' }
     ]),
-    testConnection: jest.fn().mockResolvedValue(true),
-    getClientStatus: jest.fn().mockResolvedValue({ status: 'active' })
+    testConnection: vi.fn().mockResolvedValue(true),
+    getClientStatus: vi.fn().mockResolvedValue({ status: 'active' })
   }));
 });
 
-jest.mock('../../server/clients/QBittorrentClient', () => {
-  return jest.fn().mockImplementation((config) => ({
+vi.mock('../../server/clients/QBittorrentClient', () => {
+  return vi.fn().mockImplementation((config) => ({
     getClientType: () => 'qbittorrent',
     getInstanceId: () => config.id,
     name: config.name,
-    getActiveDownloads: jest.fn().mockResolvedValue([
+    getActiveDownloads: vi.fn().mockResolvedValue([
       { id: 'qb1', title: 'QB Download 1', client: 'qbittorrent' }
     ]),
-    testConnection: jest.fn().mockResolvedValue(true),
-    getClientStatus: jest.fn().mockResolvedValue({ status: 'active' }),
-    resetFallbackFlag: jest.fn()
+    testConnection: vi.fn().mockResolvedValue(true),
+    getClientStatus: vi.fn().mockResolvedValue({ status: 'active' }),
+    resetFallbackFlag: vi.fn()
   }));
 });
 
-jest.mock('../../server/clients/TransmissionClient', () => {
-  return jest.fn().mockImplementation((config) => ({
+vi.mock('../../server/clients/TransmissionClient', () => {
+  return vi.fn().mockImplementation((config) => ({
     getClientType: () => 'transmission',
     getInstanceId: () => config.id,
     name: config.name,
-    getActiveDownloads: jest.fn().mockResolvedValue([
+    getActiveDownloads: vi.fn().mockResolvedValue([
       { id: 'trans1', title: 'Trans Download 1', client: 'transmission' }
     ]),
-    testConnection: jest.fn().mockResolvedValue(true),
-    getClientStatus: jest.fn().mockResolvedValue({ status: 'active' })
+    testConnection: vi.fn().mockResolvedValue(true),
+    getClientStatus: vi.fn().mockResolvedValue({ status: 'active' })
   }));
 });
 
@@ -69,7 +71,7 @@ describe('DownloadClientRegistry', () => {
 
   beforeEach(() => {
     testRegistry = new DownloadClientRegistry();
-    jest.clearAllMocks();
+    vi.clearAllMocks();
   });
 
   describe('Initialization', () => {
@@ -291,7 +293,7 @@ describe('DownloadClientRegistry', () => {
 
 describe('Convenience Functions', () => {
   beforeEach(() => {
-    jest.clearAllMocks();
+    vi.clearAllMocks();
   });
 
   it('should delegate to singleton registry', async () => {

tests/unit/qbittorrent.test.js

@@ -7,7 +7,8 @@
  * dashboard card rendering so correctness matters for UX.
  */
 
-import { mapTorrentToDownload, formatBytes, formatSpeed, formatEta, QBittorrentClient } from '../../server/utils/qbittorrent.js';
+import { mapTorrentToDownload, formatBytes, formatSpeed, formatEta } from '../../server/utils/qbittorrent.js';
+import QBittorrentClient from '../../server/clients/QBittorrentClient.js';
 import nock from 'nock';
 
 // Minimal torrent fixture that satisfies mapTorrentToDownload's expectations