added unit testing, and started implementing unit tests...phew

node_modules/async/series.js

@@ -0,0 +1,85 @@
+'use strict';
+
+Object.defineProperty(exports, "__esModule", {
+  value: true
+});
+exports.default = series;
+
+var _parallel = require('./internal/parallel');
+
+var _parallel2 = _interopRequireDefault(_parallel);
+
+var _eachOfSeries = require('./eachOfSeries');
+
+var _eachOfSeries2 = _interopRequireDefault(_eachOfSeries);
+
+function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
+
+/**
+ * Run the functions in the `tasks` collection in series, each one running once
+ * the previous function has completed. If any functions in the series pass an
+ * error to its callback, no more functions are run, and `callback` is
+ * immediately called with the value of the error. Otherwise, `callback`
+ * receives an array of results when `tasks` have completed.
+ *
+ * It is also possible to use an object instead of an array. Each property will
+ * be run as a function, and the results will be passed to the final `callback`
+ * as an object instead of an array. This can be a more readable way of handling
+ *  results from {@link async.series}.
+ *
+ * **Note** that while many implementations preserve the order of object
+ * properties, the [ECMAScript Language Specification](http://www.ecma-international.org/ecma-262/5.1/#sec-8.6)
+ * explicitly states that
+ *
+ * > The mechanics and order of enumerating the properties is not specified.
+ *
+ * So if you rely on the order in which your series of functions are executed,
+ * and want this to work on all platforms, consider using an array.
+ *
+ * @name series
+ * @static
+ * @memberOf module:ControlFlow
+ * @method
+ * @category Control Flow
+ * @param {Array|Iterable|Object} tasks - A collection containing
+ * [async functions]{@link AsyncFunction} to run in series.
+ * Each function can complete with any number of optional `result` values.
+ * @param {Function} [callback] - An optional callback to run once all the
+ * functions have completed. This function gets a results array (or object)
+ * containing all the result arguments passed to the `task` callbacks. Invoked
+ * with (err, result).
+ * @example
+ * async.series([
+ *     function(callback) {
+ *         // do some stuff ...
+ *         callback(null, 'one');
+ *     },
+ *     function(callback) {
+ *         // do some more stuff ...
+ *         callback(null, 'two');
+ *     }
+ * ],
+ * // optional callback
+ * function(err, results) {
+ *     // results is now equal to ['one', 'two']
+ * });
+ *
+ * async.series({
+ *     one: function(callback) {
+ *         setTimeout(function() {
+ *             callback(null, 1);
+ *         }, 200);
+ *     },
+ *     two: function(callback){
+ *         setTimeout(function() {
+ *             callback(null, 2);
+ *         }, 100);
+ *     }
+ * }, function(err, results) {
+ *     // results is now equal to: {one: 1, two: 2}
+ * });
+ */
+function series(tasks, callback) {
+  (0, _parallel2.default)(_eachOfSeries2.default, tasks, callback);
+}
+module.exports = exports['default'];