JSTests/test262/test/language/expressions/async-generator/dstr-named-dflt-ary-ptrn-rest-obj-id.js

// This file was procedurally generated from the following sources:
// - src/dstr-binding/ary-ptrn-rest-obj-id.case
// - src/dstr-binding/default/async-gen-func-named-expr-dflt.template
/*---
description: Rest element containing an object binding pattern (async generator named function expression (default parameter))
esid: sec-asyncgenerator-definitions-evaluation
features: [async-iteration]
flags: [generated, async]
info: |
    AsyncGeneratorExpression : async [no LineTerminator here] function * BindingIdentifier
        ( FormalParameters ) { AsyncGeneratorBody }

        [...]
        7. Let closure be ! AsyncGeneratorFunctionCreate(Normal, FormalParameters,
           AsyncGeneratorBody, funcEnv, strict).
        [...]


    13.3.3.6 Runtime Semantics: IteratorBindingInitialization

    BindingRestElement : ... BindingPattern

    1. Let A be ArrayCreate(0).
    [...]
    3. Repeat
       [...]
       b. If iteratorRecord.[[done]] is true, then
          i. Return the result of performing BindingInitialization of
             BindingPattern with A and environment as the arguments.
       [...]
---*/


var callCount = 0;
var f;
f = async function* h([...{ length }] = [1, 2, 3]) {
  assert.sameValue(length, 3);
  callCount = callCount + 1;
};

f().next().then(() => {
    assert.sameValue(callCount, 1, 'invoked exactly once');
}).then($DONE, $DONE);