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implementing Integration Tests in a Node.js Express App Using Supertest and Jest

👀 Views: 121 💬 Answers: 1 📅 Created: 2025-06-22
jest supertest express JavaScript

I'm trying to debug I'm currently working on a Node.js Express application, and I'm trying to set up integration tests using Supertest along with Jest... I've created a few endpoints, and my tests seem to execute without errors, but I'm not getting the expected results. For instance, when I send a POST request to create a new user, the response returns a 200 status code and an empty object rather than the correct user data. Here's a snippet of my test code: ```javascript const request = require('supertest'); const app = require('../app'); describe('User Endpoints', () => { it('should create a new user', async () => { const response = await request(app) .post('/users') .send({ username: 'testuser', password: 'password123' }); expect(response.status).toBe(200); expect(response.body).toHaveProperty('id'); expect(response.body.username).toBe('testuser'); }); }); ``` The `POST /users` route is defined as follows: ```javascript app.post('/users', async (req, res) => { const { username, password } = req.body; const user = await User.create({ username, password }); res.status(200).json(user); }); ``` I’ve confirmed that the database connection is working and that the user is supposed to be saved properly, but the response from the route is not as expected. I've tried logging the output of the user object just before sending the response, and it looks correct. However, I'm seeing the behavior in the test where it fails to assert the properties on the response body. Is there something I might be overlooking with async/await in the route, or could there be a misconfiguration in how I'm using Supertest with Jest? Any suggestions would be greatly appreciated. Any suggestions would be helpful.