michael@0: // Forward to the target if the trap is not defined
michael@0: var names = Object.getOwnPropertyNames(Proxy(Object.create(Object.create(null, {
michael@0:     a: {
michael@0:         enumerable: true,
michael@0:         configurable: true
michael@0:     },
michael@0:     b: {
michael@0:         enumerable: false,
michael@0:         configurable: true
michael@0:     }
michael@0: }), {
michael@0:     c: {
michael@0:         enumerable: true,
michael@0:         configurable: true
michael@0:     },
michael@0:     d: {
michael@0:         enumerable: false,
michael@0:         configurable: true
michael@0:     }
michael@0: }), {}));
michael@0: assertEq(names.length, 2);
michael@0: assertEq(names[0], 'c');
michael@0: assertEq(names[1], 'd');