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// |reftest| async
// This file was procedurally generated from the following sources:
// - src/dstr-binding/ary-init-iter-no-close.case
// - src/dstr-binding/default/async-gen-func-decl-dflt.template
/*---
description: Iterator is not closed when exhausted by pattern evaluation (async generator function declaration (default parameter))
esid: sec-asyncgenerator-definitions-instantiatefunctionobject
features: [Symbol.iterator, async-iteration]
flags: [generated, async]
info: |
AsyncGeneratorDeclaration : async [no LineTerminator here] function * BindingIdentifier
( FormalParameters ) { AsyncGeneratorBody }
[...]
3. Let F be ! AsyncGeneratorFunctionCreate(Normal, FormalParameters, AsyncGeneratorBody,
scope, strict).
[...]
13.3.3.5 Runtime Semantics: BindingInitialization
BindingPattern : ArrayBindingPattern
[...]
4. If iteratorRecord.[[done]] is false, return ? IteratorClose(iterator,
result).
[...]
---*/
var doneCallCount = 0;
var iter = {};
iter[Symbol.iterator] = function() {
return {
next: function() {
return { value: null, done: true };
},
return: function() {
doneCallCount += 1;
return {};
}
};
};
var callCount = 0;
async function* f([x] = iter) {
assert.sameValue(doneCallCount, 0);
callCount = callCount + 1;
};
f().next().then(() => {
assert.sameValue(callCount, 1, 'invoked exactly once');
}).then($DONE, $DONE);
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