So siehts ganz gut aus !

node_modules/es5-ext/test/object/primitive-set.js

@@ -0,0 +1,15 @@
+"use strict";
+
+var getPropertyNames = require("../../object/get-property-names")
+  , isPlainObject    = require("../../object/is-plain-object");
+
+module.exports = function (t, a) {
+	var x = t();
+	a(isPlainObject(x), true, "Plain object");
+	a.deep(getPropertyNames(x), [], "No properties");
+	x.foo = "bar";
+	a.deep(getPropertyNames(x), ["foo"], "Extensible");
+
+	a.deep(t("raz", "dwa", 3), { raz: true, dwa: true, 3: true },
+		"Arguments handling");
+};