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Diffstat (limited to 'js/src/tests/non262/AsyncIterator/prototype/lazy-methods-proxy-accesses.js')
-rw-r--r-- | js/src/tests/non262/AsyncIterator/prototype/lazy-methods-proxy-accesses.js | 68 |
1 files changed, 68 insertions, 0 deletions
diff --git a/js/src/tests/non262/AsyncIterator/prototype/lazy-methods-proxy-accesses.js b/js/src/tests/non262/AsyncIterator/prototype/lazy-methods-proxy-accesses.js new file mode 100644 index 0000000000..5892a41e5b --- /dev/null +++ b/js/src/tests/non262/AsyncIterator/prototype/lazy-methods-proxy-accesses.js @@ -0,0 +1,68 @@ +// |reftest| skip-if(!this.hasOwnProperty('AsyncIterator')) +// + +/*--- +esid: pending +description: Lazy %AsyncIterator.prototype% methods access specified properties only. +info: > + Iterator Helpers proposal 2.1.6 +features: [iterator-helpers] +---*/ + +let log; +const handlerProxy = new Proxy({}, { + get: (target, key, receiver) => (...args) => { + log.push(`${key}: ${args.filter(x => typeof x != 'object').map(x => x.toString())}`); + return Reflect[key](...args); + }, +}); + +class TestIterator extends AsyncIterator { + value = 0; + async next() { + if (this.value < 1) + return new Proxy({done: false, value: this.value++}, handlerProxy); + return new Proxy({done: true, value: undefined}, handlerProxy); + } +} + +const methods = [ + ['map', x => x], + ['filter', x => true], + ['take', 4], + ['drop', 0], + ['asIndexedPairs', undefined], + ['flatMap', async function*(x) { yield x; }], +]; + +(async () => { + for (const [method, argument] of methods) { + log = []; + const iteratorProxy = new Proxy(new TestIterator(), handlerProxy); + const iteratorHelper = iteratorProxy[method](argument); + + await iteratorHelper.next(); + await iteratorHelper.next(); + const {done} = await iteratorHelper.next(); + assertEq(done, true); + assertEq( + log.join('\n'), + `get: ${method} +get: next +get: value +get: value +set: value,1 +getOwnPropertyDescriptor: value +defineProperty: value +get: then +get: done +get: value +get: value +get: then +get: done` + ); + } +})(); + +if (typeof reportCompare == 'function') + reportCompare(0, 0); |