TDD For Authors' Haven - Elven

userFollowTest.js

// Chukwuka Odina

// Import the Chai assertion library and it's http plugin
// Use 'should' as the assertion type
import chai from 'chai';
import 'chai/register-should';
import chaiHttp from 'chai-http';

// Import the app 
import app from '../server/index';

// Initialise chai with the http plugin
chai.use(chaiHttp);

describe('User follow action', () => {
  const alreadyFollowedUser = 'veraclins'; // a user profile that the test user is already following
  const unfollowedUser = 'andela'; // a user profile that the test user is not following
  const self = 'madeofhuman' // the test user
  const token = 'Bearer 762busajsnoay4a.njsahib8yogr.mnasuheegfv73hybj' // the bearer token

  describe('When the user is already following the new user', () => {
    it('should not follow the new user', (done) => {
      chai.request(app)
        .post(`/api/profiles/${alreadyFollowedUser}/follow`)
        .set('content-type', 'application/json')
        .set('Authorization', token)
        .end((err, res) => {
          res.should.have.status(409);
          res.body.should.be.an('object').with.property('errors');
          res.body.errors.should.be.an('object').with.property('message')
            .equals('You are already following this user.');
          done();
        });
    });
  });
  
  describe('When the user is not yet following the new user', () => {
    it('should follow the new user', (done) => {
      chai.request(app)
        .post(`/api/profiles/${unfollowedUser}/follow`)
        .set('content-type', 'application/json')
        .set('Authorization', token)
        .end((err, res) => {
          res.should.have.status(201);
          res.body.should.be.an('object').with.property('success');
          res.body.success.should.have.property('message')
            .equals(`You are now following ${unfollowedUser}`);
          res.body.should.have.property('user');
          res.body.user.should.be.an('object').with.property('username')
            .equals(unfollwedUser);
          done();
        });
    });
  });
  
  describe('When the user tries to follow themself', () => {
    it('should return an error', (done) => {
      chai.request(app)
        .post(`/api/profiles/${self}/follow`)
        .set('content-type', 'application/json')
        .set('Authorization', token)
        .end((err, res) => {
          res.should.have.status(409);
          res.body.should.be.an('object').with.property('errors');
          res.body.errors.should.be.an('object').with.property('message')
            .equals(`You cannot follow yourself.`);
          done();
        });
    });
  });
});

A well formatted and descriptive task. Good job. But I feel you expectin g 422 as the status code of your last test would be much better. This is because 409 means the resource you are trying to create exists on the server already and would create conflicts. 422 means the server understands your request but can't process it due to semantic errors.