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

// This file was procedurally generated from the following sources:
// - src/dstr-binding/obj-ptrn-id-init-skipped.case
// - src/dstr-binding/default/async-gen-func-named-expr.template
/*---
description: Destructuring initializer is not evaluated when value is not `undefined` (async generator named function expression)
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
       [...]
    [...]
---*/
var initCount = 0;
function counter() {
  initCount += 1;
}


var callCount = 0;
var f;
f = async function* h({ w = counter(), x = counter(), y = counter(), z = counter() }) {
  assert.sameValue(w, null);
  assert.sameValue(x, 0);
  assert.sameValue(y, false);
  assert.sameValue(z, '');
  assert.sameValue(initCount, 0);
  callCount = callCount + 1;
};

f({ w: null, x: 0, y: false, z: '' }).next().then(() => {
    assert.sameValue(callCount, 1, 'invoked exactly once');
}).then($DONE, $DONE);