michael@0: function getter() { return 1; }
michael@0: function setter() { }
michael@0: function getDescriptor(name) {
michael@0:   if (name != 'prop')
michael@0:     throw "Unknown property: " + name;
michael@0:   return { configurable: true, enumerable: true, get: getter, set: setter };
michael@0: }
michael@0: function getNames() { return ['prop']; }
michael@0: var handler = {
michael@0:   getOwnPropertyDescriptor: getDescriptor,
michael@0:   getPropertyDescriptor: getDescriptor,
michael@0:   getOwnPropertyNames: getNames,
michael@0:   getPropertyNames: getNames,
michael@0:   defineProperty: function() {},
michael@0:   delete: function() {}
michael@0: };
michael@0: 
michael@0: // Make sure that __lookup{Getter,Setter}__ works on proxies.
michael@0: var proxy = Proxy.create(handler);
michael@0: assertEq(Object.prototype.__lookupGetter__.call(proxy, 'prop'), getter);
michael@0: assertEq(Object.prototype.__lookupSetter__.call(proxy, 'prop'), setter);