--- /dev/null
+'use strict';
+
+var iteratorSymbol = require('es6-symbol').iterator
+ , Iterator = require('../');
+
+module.exports = function (t, a) {
+ var obj;
+ a.throws(function () { t(); }, TypeError, "Undefined");
+ a.throws(function () { t({}); }, TypeError, "Plain object");
+ a.throws(function () { t({ length: 0 }); }, TypeError, "Array-like");
+ obj = {};
+ obj[iteratorSymbol] = function () { return new Iterator([]); };
+ a(t(obj), obj, "Iterator");
+ obj = [];
+ a(t(obj), obj, 'Array');
+ obj = (function () { return arguments; }());
+ a(t(obj), obj, "Arguments");
+};