old_contents: const assert = require('chai').assert;
  const expect = require('chai').expect;
  const server = require('../app.js');
  
  describe('Tests api functionality', () => {
    describe('/', () => {
      it('Should respond with a 200 OK', () => {
        server.inject({
          method: 'GET',
          url: '/'
        }, res => {
          expect(res.statusCode).to.equal(200);
        });
      });
    });
  });
  
new_contents: 'use strict';
  
  const assert = require('chai').assert;
  const expect = require('chai').expect;
  const server = require('../app.js');
  
  describe('Tests api functionality', () => {
    describe('/', () => {
      it('Should respond with a 200 OK', (done) => {
        server.inject({
          method: 'GET',
          url: '/'
        }, res => {
          expect(res.statusCode).to.equal(200);
        });
        done();
      });
    });
  });
  
subject: test is kind of working