lux-framework/src/packages/luxify/test/luxify.test.js

Build scalable, Node.js-powered REST APIs with almost no code.

// @flow
import { expect } from 'chai';
import { it, describe } from 'mocha';

import luxify from '../index';

import K from '../../../utils/k';
import setType from '../../../utils/set-type';

describe('module "luxify"', () => {
  describe('#luxify()', () => {
    const [request, response] = setType(() => [
      {},
      {
        getHeader: K,
        setHeader: K,
        removeHeader: K
      }
    ]);

    it('promisifies a callback based middleware function', () => {
      const subject = luxify((req, res, next) => {
        next();
      });

      expect(subject(request, response)).to.be.a('promise');
    });

    it('resolves when Response#end is called', () => {
      const subject = luxify((req, res) => {
        res.end('Hello world!');
      });

      return subject(request, response).then(data => {
        expect(data).to.equal('Hello world!');
      });
    });

    it('resolves when Response#send is called', () => {
      const subject = luxify((req, res) => {
        Reflect.apply(Reflect.get(res, 'send'), res, ['Hello world!']);
      });

      return subject(request, response).then(data => {
        expect(data).to.equal('Hello world!');
      });
    });

    it('resolves when Response#json is called', () => {
      const subject = luxify((req, res) => {
        Reflect.apply(Reflect.get(res, 'json'), res, [{
          data: 'Hello world!'
        }]);
      });

      return subject(request, response).then(data => {
        expect(data).to.deep.equal({
          data: 'Hello world!'
        });
      });
    });

    it('rejects when an error is passed to `next`', () => {
      const subject = luxify((req, res, next) => {
        next(new Error('Test'));
      });

      return subject(request, response).catch(err => {
        expect(err).to.be.a('error');
      });
    });

    it('properly proxies untrapped response properties', () => {
      luxify((req, res) => {
        expect(res.getHeader).to.be.a('function');
        expect(res.setHeader).to.be.a('function');
        expect(res.removeHeader).to.be.a('function');
      });
    });
  });
});