const request = require('supertest'); const app = require('../../src/app'); describe('/ 404 handler check', () => { test('should return HTTP 404 response', async () => { const res = await request(app).get('/error'); expect(res.statusCode).toBe(404); expect(res.body.status).toBe('error'); expect(res.body.error.message).toBe('not found'); expect(res.body.error.code).toBe(404); }); });