michael@0: load(libdir + "asserts.js");
michael@0: 
michael@0: /*
michael@0:  * Throw a TypeError if the trap reports a new own property on a non-extensible
michael@0:  * object
michael@0:  */
michael@0: var target = {};
michael@0: Object.preventExtensions(target);
michael@0: assertThrowsInstanceOf(function () {
michael@0:     ({}).hasOwnProperty.call(new Proxy(target, {
michael@0:         hasOwn: function (target, name) {
michael@0:             return true;
michael@0:         }
michael@0:     }), 'foo');
michael@0: }, TypeError);