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|
// |reftest| skip-if(!this.hasOwnProperty('Iterator'))
//
/*---
esid: pending
description: %Iterator.prototype%.map accesses specified properties only.
info: >
features: [iterator-helpers]
---*/
const handlerProxy = log => new Proxy({}, {
get: (target, key, receiver) => (...args) => {
const target = args[0];
const item = Reflect[key](...args);
log.push(`${key}: ${args.filter(x => typeof x != 'object').map(x => x.toString())}`);
switch (typeof item) {
case 'function': return item.bind(new Proxy(target, handlerProxy(log)));
case 'object': return new Proxy(item, handlerProxy(log));
default: return item;
}
},
});
const log = [];
const iterator = Object.setPrototypeOf({
next: function() {
if (this.value < 3)
return { done: false, value: this.value++ };
return { done: true, value: undefined };
},
value: 0,
}, Iterator.prototype);
const iteratorProxy = new Proxy(iterator, handlerProxy(log));
const mappedProxy = iteratorProxy.map(x => x);
for (const item of mappedProxy) {
}
assertEq(
log.join('\n'),
`get: map
get: next
get: value
get: value
getOwnPropertyDescriptor: value
has: enumerable
get: enumerable
has: configurable
get: configurable
has: value
get: value
has: writable
get: writable
has: get
has: set
defineProperty: value
set: value,1
get: value
get: value
getOwnPropertyDescriptor: value
has: enumerable
get: enumerable
has: configurable
get: configurable
has: value
get: value
has: writable
get: writable
has: get
has: set
defineProperty: value
set: value,2
get: value
get: value
getOwnPropertyDescriptor: value
has: enumerable
get: enumerable
has: configurable
get: configurable
has: value
get: value
has: writable
get: writable
has: get
has: set
defineProperty: value
set: value,3
get: value`
);
if (typeof reportCompare == 'function')
reportCompare(0, 0);
|
