fixes #221, initial sync*, async, async* implementation

test/js_test_tools/mocha-htmltest.js

-/**
- * @license
- * Copyright (c) 2014 The Polymer Project Authors. All rights reserved.
- * This code may only be used under the BSD style license found at http://polymer.github.io/LICENSE.txt
- * The complete set of authors may be found at http://polymer.github.io/AUTHORS.txt
- * The complete set of contributors may be found at http://polymer.github.io/CONTRIBUTORS.txt
- * Code distributed by Google as part of the polymer project is also
- * subject to an additional IP rights grant found at http://polymer.github.io/PATENTS.txt
- */
-
-(function() {
-  var thisFile = 'lib/mocha-htmltest.js';
-  var base = '';
-
-  mocha.htmlbase = function(htmlbase) {
-    base = htmlbase;
-  };
-
-  (function() {
-    var s$ = document.querySelectorAll('script[src]');
-    Array.prototype.forEach.call(s$, function(s) {
-      var src = s.getAttribute('src');
-      var re = new RegExp(thisFile + '[^\\\\]*');
-      var match = src.match(re);
-      if (match) {
-        base = src.slice(0, -match[0].length);
-      }
-    });
-  })();
-
-  var next, iframe;
-
-  var listener = function(event) {
-    if (event.data === 'ok') {
-      next();
-    } else if (event.data && event.data.error) {
-      // errors cannot be cloned via postMessage according to spec, so we re-errorify them
-      throw new Error(event.data.error);
-    }
-  };
-
-  function htmlSetup() {
-    window.addEventListener("message", listener);
-    iframe = document.createElement('iframe');
-    iframe.style.cssText = 'position: absolute; left: -9000em; width:768px; height: 1024px';
-    document.body.appendChild(iframe);
-  }
-
-  function htmlTeardown() {
-    window.removeEventListener('message', listener);
-    document.body.removeChild(iframe);
-  }
-
-  function htmlTest(src) {
-    var basePath = calcBase();
-    test(src, function(done) {
-      next = done;
-      var url = basePath + src;
-      var delimiter = url.indexOf('?') < 0 ? '?' : '&';
-      var docSearch = location.search.slice(1);
-      iframe.src = url + delimiter + Math.random() + '&' + docSearch;
-    });
-  };
-
-  function htmlSuite(inName, inFn) {
-    suite(inName, function() {
-      setup(htmlSetup);
-      teardown(htmlTeardown);
-      inFn();
-    });
-  };
-
-  function calcBase() {
-    var b = base;
-    var script = document._currentScript ||
-      document.scripts[document.scripts.length - 1];
-    if (script) {
-      var parts = script.src.split('/');
-      parts.pop();
-      b = parts.join('/') + '/';
-    }
-    return b;
-  }
-
-  window.htmlTest = htmlTest;
-  window.htmlSuite = htmlSuite;
-})();