--- /dev/null
+'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");
+};