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// |reftest| skip-if(!this.hasOwnProperty('AsyncIterator'))
class TestError extends Error {}
class TestIterator extends AsyncIterator {
async next() {
return {done: false, value: 'value'};
}
closed = false;
async return(value) {
this.closed = true;
return {done: true, value};
}
}
function checkIterResult({done, value}, expectedDone, expectedValue) {
assertEq(done, expectedDone);
assertEq(Array.isArray(value) ? value[1] : value, expectedValue);
}
const otherGlobal = newGlobal({newCompartment: true});
const methods = [
["map", x => x],
["filter", x => true],
["take", Infinity],
["drop", 0],
["asIndexedPairs", undefined],
["flatMap", async function*(x) { yield x; }],
];
const {next: otherNext, return: otherReturn, throw: otherThrow} =
Object.getPrototypeOf(otherGlobal.eval("(async function*() {})().map(x => x)"));
(async () => {
for (const [method, arg] of methods) {
const iterator = new TestIterator();
const helper = iterator[method](arg);
checkIterResult(await otherNext.call(helper), false, 'value');
}
for (const [method, arg] of methods) {
const iterator = new TestIterator();
const helper = iterator[method](arg);
assertEq(iterator.closed, false);
checkIterResult(await otherReturn.call(helper), true, undefined);
assertEq(iterator.closed, true);
}
for (const [method, arg] of methods) {
const iterator = new TestIterator();
const helper = iterator[method](arg);
try {
await otherThrow.call(helper, new TestError());
assertEq(true, false, 'Expected exception');
} catch (exc) {
assertEq(exc instanceof TestError, true);
}
checkIterResult(await helper.next(), true, undefined);
}
})();
if (typeof reportCompare === 'function')
reportCompare(0, 0);
|
