localstorage-memory/tests/webrunner.js

/* global mocha: true */

'use strict';

var scriptsToLoad = [
  '../lib/localstorage-memory.js'
];

// Thanks to http://engineeredweb.com/blog/simple-async-javascript-loader/
function asyncLoadScript(url, callback) {

  // Create a new script and setup the basics.
  var script = document.createElement('script');
  var firstScript = document.getElementsByTagName('script')[0];

  script.async = true;
  script.src = url;

  // Handle the case where an optional callback was passed in.
  if ('function' === typeof(callback)) {
    script.onload = function () {
      callback();

      // Clear it out to avoid getting called more than once or any
      // memory leaks.
      script.onload = script.onreadystatechange = undefined;
    };
    script.onreadystatechange = function () {
      if ('loaded' === script.readyState || 'complete' === script.readyState) {
        script.onload();
      }
    };
  }

  // Attach the script tag to the page (before the first script) so the
  // magic can happen.
  firstScript.parentNode.insertBefore(script, firstScript);
}

function startTests() {

  function onReady() {
    var runner = mocha.run();
    window.results = {
      lastPassed: '',
      passed: 0,
      failed: 0,
      failures: []
    };

    runner.on('pass', function (e) {
      window.results.lastPassed = e.title;
      window.results.passed++;
    });

    runner.on('fail', function (e) {
      window.results.failed++;
      window.results.failures.push({
        title: e.title,
        message: e.err.message,
        stack: e.err.stack
      });
    });

    runner.on('end', function () {
      window.results.completed = true;
      window.results.passed++;
    });
  }

  function loadNext() {
    if (scriptsToLoad.length) {
      var script = scriptsToLoad.shift();
      asyncLoadScript(script, loadNext);
    } else {
      onReady();
    }
  }

  loadNext();
}

startTests();