JSTests/test262/test/language/expressions/async-generator/dstr/named-dflt-obj-ptrn-id-init-fn-name-fn.js

// This file was procedurally generated from the following sources:
// - src/dstr-binding/obj-ptrn-id-init-fn-name-fn.case
// - src/dstr-binding/default/async-gen-func-named-expr-dflt.template
/*---
description: SingleNameBinding assigns name to "anonymous" functions (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).
        [...]


    13.3.3.7 Runtime Semantics: KeyedBindingInitialization

    SingleNameBinding : BindingIdentifier Initializeropt

    [...]
    6. If Initializer is present and v is undefined, then
       [...]
       d. If IsAnonymousFunctionDefinition(Initializer) is true, then
          i. Let hasNameProperty be HasOwnProperty(v, "name").
          ii. ReturnIfAbrupt(hasNameProperty).
          iii. If hasNameProperty is false, perform SetFunctionName(v,
               bindingId).
---*/


var callCount = 0;
var f;
f = async function* h({ fn = function () {}, xFn = function x() {} } = {}) {
  assert.sameValue(fn.name, 'fn');
  assert.notSameValue(xFn.name, 'xFn');
  callCount = callCount + 1;
};

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