[CHE-171] Refactor Catch All Route Handler

__tests__/errorController.test.ts

@@ -1,7 +1,8 @@
+import app from '../server/index';
+import request from 'supertest';
 import { Request, Response, NextFunction } from 'express';
-import { notFound } from '../server/controllers/errorControllers';
 import errorHandler from '../server/middleware/errorHandler';
-import { BadRequestError } from '../server/errors';
+import { BadRequestError, NotFoundError } from '../server/errors';
 
 describe('Middleware Tests', () => {
   let mockRequest: Partial<Request>;
@@ -18,10 +19,13 @@ describe('Middleware Tests', () => {
   });
 
   describe('notFound Middleware', () => {
-    it('should return 404 and the original URL', () => {
-      notFound(mockRequest as Request, mockResponse as Response, mockNext);
-      expect(mockResponse.status).toHaveBeenCalledWith(404);
-      expect(mockNext).toHaveBeenCalled();
+    it('should return 404 and the original URL', async () => {
+      const exampleNotFoundError = new NotFoundError();
+
+      const response = await request(app).get('/non-existent-route').send();
+
+      expect(response.status).toEqual(404);
+      expect(response.body).toEqual(exampleNotFoundError.serializeErrors());
     });
   });
 

server/index.ts

@@ -11,8 +11,8 @@ import devRoutes from './routes/devRoutes';
 import connectDB from './config/db';
 import dotenv from 'dotenv';
 import cookieParser from 'cookie-parser';
-import { notFound } from './controllers/errorControllers';
 import errorHandler from './middleware/errorHandler';
+import { NotFoundError } from './errors';
 
 dotenv.config();
 
@@ -21,8 +21,6 @@ const app: Application = express();
 app.use(express.json());
 app.use(cookieParser());
 
-connectDB();
-
 app.get('/health', (req: Request, res: Response) => {
   res.status(200).send('OK');
 });
@@ -49,13 +47,17 @@ if (process.env.NODE_ENV === 'production') {
   });
 }
 
-app.use(notFound);
+app.use((_req, _res) => {
+  throw new NotFoundError();
+});
 
 app.use(errorHandler);
 
 const PORT: number = Number(process.env.PORT) || 3000;
 
 export const startServer = () => {
+  connectDB();
+
   return app.listen(PORT, () =>
     console.log(`Server running in ${process.env.NODE_ENV} mode on port ${PORT}`),
   );