Source code
Revision control
Copy as Markdown
Other Tools
// |reftest| async
// This file was procedurally generated from the following sources:
// - src/async-generators/yield-star-getiter-async-null-sync-get-abrupt.case
// - src/async-generators/default/async-obj-method.template
/*---
description: Abrupt completion while getting @@iterator after null @@asyncIterator (Async generator method)
esid: prod-AsyncGeneratorMethod
features: [Symbol.iterator, Symbol.asyncIterator, async-iteration]
flags: [generated, async]
info: |
Async Generator Function Definitions
AsyncGeneratorMethod :
async [no LineTerminator here] * PropertyName ( UniqueFormalParameters ) { 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).
b. If method is undefined,
i. Let syncMethod be ? GetMethod(obj, @@iterator).
...
GetMethod ( V, P )
...
2. Let func be ? GetV(V, P).
...
---*/
var calls = 0;
var reason = {};
var obj = {
get [Symbol.iterator]() {
throw reason;
},
get [Symbol.asyncIterator]() {
calls += 1;
return null;
}
};
var callCount = 0;
var gen = {
async *method() {
callCount += 1;
yield* obj;
throw new Test262Error('abrupt completion closes iter');
}
}.method;
var iter = gen();
iter.next().then(() => {
throw new Test262Error('Promise incorrectly fulfilled.');
}, v => {
assert.sameValue(v, reason, 'reject reason');
assert.sameValue(calls, 1);
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);