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

node_modules/async/internal/initialParams.js

@@ -0,0 +1,21 @@
+'use strict';
+
+Object.defineProperty(exports, "__esModule", {
+    value: true
+});
+
+exports.default = function (fn) {
+    return function () /*...args, callback*/{
+        var args = (0, _slice2.default)(arguments);
+        var callback = args.pop();
+        fn.call(this, args, callback);
+    };
+};
+
+var _slice = require('./slice');
+
+var _slice2 = _interopRequireDefault(_slice);
+
+function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
+
+module.exports = exports['default'];