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// |reftest| skip-if(!this.hasOwnProperty('Iterator'))
//
/*---
esid: pending
description: %Iterator.prototype%.map calls return when yield throws.
info: >
features: [iterator-helpers]
---*/
class TestError extends Error {}
class TestIterator extends Iterator {
constructor(log) {
super();
this.log = log;
}
next() {
return {done: false, value: 0};
}
return(value) {
log.push('close iterator');
return {done: true, value};
}
}
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 = new TestIterator(log);
const iteratorProxy = new Proxy(iterator, handlerProxy(log));
const mappedProxy = iteratorProxy.map(x => x);
mappedProxy.next();
assertThrowsInstanceOf(() => mappedProxy.throw(new TestError()), TestError);
mappedProxy.next();
assertEq(
log.join('\n'),
`get: map
get: next
get: return
close iterator`
);
if (typeof reportCompare == 'function')
reportCompare(0, 0);
|
