load-json-spec.js

/* global require, describe, it */

var assert = require('assert');
const URL_PREFIX = 'http://katas.u/katas/es6/language/';
const KATAS_URL = `${URL_PREFIX}__grouped__.json`;

describe('load ES6 kata data', function() {
  it('loaded data are as expected', function(done) {
    function onSuccess(groupedKatas) {
      assert.ok(groupedKatas);
      done();
    }

    loadGroupedKata(KATAS_URL, function() {}, onSuccess);
  });
  describe('on error, call error callback and the error passed', function() {
    it('invalid JSON', function(done) {
      function onError(err) {
        assert.ok(err);
        done();
      }
  
      var invalidUrl = URL_PREFIX;
      loadGroupedKata(invalidUrl, onError);
    });
    it('for invalid data', function(done) {
      function onError(err) {
        assert.ok(err);
        done();
      }
      function onSuccess() {
        done(new Error('`onError` was not called'));
      }
  
      var invalidData = URL_PREFIX + '__all__.json';
      loadGroupedKata(invalidData, onError, onSuccess);
    });
  });
});


import http from 'http';
import url from 'url';

function loadGroupedKata(katasUrl, onError, onSuccess) {
  var data = '';
  var options = url.parse(katasUrl);
  options.withCredentials = false;
  var request = http.request(options, function(res) {
    res.on('data', function(chunk) {data += chunk;});
    res.on('end', function() {
      try {
        const parsed = JSON.parse(data);
        if (!onSuccess) {
          return
        }
        if ('groups' in parsed) {
          onSuccess(parsed);
        } else {
          onError('No groups found in this data.');
        }
      } catch (e) {
        onError(e);
      }
    });
  });
  request.on('error', function(e) {
    onError(e);
  });
  request.end();
}

package.json

{
  "name": "testing-async-workshop",
  "version": "1.0.0",
  "description": "Testing async workshop",
  "main": "index.js",
  "scripts": {
    "test": "npm run lint && mocha --compilers js:babel/register test",
    "lint": "eslint src"
  },
  "keywords": [
    "es6",
    "tests"
  ],
  "author": "Wolfram Kriesing",
  "license": "MIT",
  "devDependencies": {
    "babel": "^5.8.23",
    "mocha": "^2.3.3"
  }
}