articleTest.js

import index from '../../index';
import supertest from 'supertest';
import assert from 'assert';
import jwt from 'jsonwebtoken';

const path = '/api/v1/articles';
const request = supertest(index);

const token = jwt.sign({
  userId: '10',
  userEmail: 'andela@yesmail.com'
}, process.env.JWT_KEY);

describe('Get Article', () => {
  it('should return error when given an article id that is not an integer',
    (done) => {
      request.get(`${path}/@re`)
        .set('Authorization', `Bearer ${token}`)
        .end((err, res) => {
          assert.equal(res.statusCode, 400);
          assert.equal(res.body.error, 'Article Id should be integer');
          done();
        });
    });
  
  it('should return error when the given Article Id is not found',
    (done) => {
      request.get(`${path}/46`)
        .set('Authorization', `Bearer ${token}`)
        .end((err, res) => {
          assert.equal(res.statusCode, 404);
          assert.equal(res.body.error, 'Article Id not found');
          done();
        });
    });
  
    it('should return article details when given a valid article id',
    (done) => {
      request.get(`${path}/1`)
        .set('Authorization', `Bearer ${token}`)
        .end((err, res) => {
          assert.equal(res.statusCode, 200);
          assert.equal(res.body.article.title, 'The Journey At Andela so far');
          assert.equal(res.body.article.imageLink, 'https://res.cloudinary.com/demo/image/upload/.jpg');
          done();
        });
    });
});

Nice job Idris... But I think your test should use mock data which includes a UUID in the URL path

Nice Job Idris!