michael@0: // Forward to the target if the trap is undefined
michael@0: var target = function (x, y) {
michael@0:     this.foo = x + y;
michael@0: }
michael@0: var obj = new (Proxy(target, {}))(2, 3);
michael@0: assertEq(obj.foo, 5);
michael@0: assertEq(Object.getPrototypeOf(obj), target.prototype);