So siehts ganz gut aus !

node_modules/es5-ext/test/object/validate-stringifiable.js

@@ -0,0 +1,18 @@
+"use strict";
+
+module.exports = function (t, a) {
+	var x;
+	a(t(), "undefined", "Undefined");
+	a(t(null), "null", "Null");
+	a(t(0), "0");
+	a(t(false), "false");
+	a(t(""), "");
+	a(t({}), String({}), "Object");
+	a(t(x = function () {}), String(x), "Function");
+	a(t(x = new String("raz")), String(x), "String object"); // Jslint: ignore
+	a(t(x = new Date()), String(x), "Date");
+
+	a.throws(function () {
+ t(Object.create(null));
+}, TypeError, "Null prototype object");
+};