--- /dev/null
+'use strict';
+
+var create = require('../../../object/create')
+
+ , getPrototypeOf = Object.getPrototypeOf;
+
+module.exports = function (t, a) {
+ var x = {}, y = {};
+
+ if (t === null) return;
+ a(t(x, y), x, "Return self object");
+ a(getPrototypeOf(x), y, "Object");
+ a.throws(function () { t(x); }, TypeError, "Undefined");
+ a.throws(function () { t('foo'); }, TypeError, "Primitive");
+ a(getPrototypeOf(t(x, null)), t.nullPolyfill || null, "Null");
+ x = create(null);
+ a.h1("Change null prototype");
+ a(t(x, y), x, "Result");
+ a(getPrototypeOf(x), y, "Prototype");
+ a.h1("Set null prototype");
+ a(t(y, null), y, "Result");
+ a(getPrototypeOf(y), t.nullPolyfill || null, "Prototype");
+};