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// |reftest| async
// This file was procedurally generated from the following sources:
// - src/async-generators/yield-star-getiter-sync-returns-symbol-throw.case
// - src/async-generators/default/async-declaration.template
/*---
description: Non object returned by [Symbol.iterator]() - symbol (Async generator Function declaration)
esid: prod-AsyncGeneratorDeclaration
features: [Symbol.iterator, async-iteration]
flags: [generated, async]
info: |
Async Generator Function Definitions
AsyncGeneratorDeclaration:
async [no LineTerminator here] function * BindingIdentifier ( FormalParameters ) {
AsyncGeneratorBody }
YieldExpression: yield * AssignmentExpression
1. Let exprRef be the result of evaluating AssignmentExpression.
2. Let value be ? GetValue(exprRef).
3. Let generatorKind be ! GetGeneratorKind().
4. Let iterator be ? GetIterator(value, generatorKind).
...
GetIterator ( obj [ , hint ] )
...
3. If hint is async,
a. Set method to ? GetMethod(obj, @@asyncIterator).
i. Let syncMethod be ? GetMethod(obj, @@iterator).
ii. Let syncIterator be ? Call(syncMethod, obj).
iii. Return ? CreateAsyncFromSyncIterator(syncIterator).
...
CreateAsyncFromSyncIterator(syncIterator)
1. If Type(syncIterator) is not Object, throw a TypeError exception.
...
---*/
var obj = {
[Symbol.iterator]() {
return Symbol.iterator;
}
};
var callCount = 0;
async function *gen() {
callCount += 1;
yield* obj;
throw new Test262Error('abrupt completion closes iter');
}
var iter = gen();
iter.next().then(() => {
throw new Test262Error('Promise incorrectly fulfilled.');
}, v => {
assert.sameValue(v.constructor, TypeError, "TypeError");
iter.next().then(({ done, value }) => {
assert.sameValue(done, true, 'the iterator is completed');
assert.sameValue(value, undefined, 'value is undefined');
}).then($DONE, $DONE);
}).catch($DONE);
assert.sameValue(callCount, 1);
|
