test/language/statements/for-await-of/dstr-const-obj-ptrn-rest-obj-nested-rest.js

// This file was procedurally generated from the following sources:
// - src/dstr-binding/obj-ptrn-rest-obj-nested-rest.case
// - src/dstr-binding/default/for-await-of-const.template
/*---
description: When DestructuringAssignmentTarget is an object literal, it should be parsed parsed as a DestructuringAssignmentPattern and evaluated as a destructuring assignment and object rest desconstruction is allowed in that case. (for-await-of statement)
esid: sec-for-in-and-for-of-statements-runtime-semantics-labelledevaluation
features: [object-rest, destructuring-binding, async-iteration]
flags: [generated, async]
includes: [propertyHelper.js]
info: |
    IterationStatement :
        for await ( ForDeclaration of AssignmentExpression ) Statement

    [...]
    2. Return ? ForIn/OfBodyEvaluation(ForDeclaration, Statement, keyResult,
        lexicalBinding, labelSet, async).

    13.7.5.13 Runtime Semantics: ForIn/OfBodyEvaluation

    [...]
    3. Let destructuring be IsDestructuring of lhs.
    [...]
    5. Repeat
       [...]
       h. If destructuring is false, then
          [...]
       i. Else
          i. If lhsKind is assignment, then
             [...]
          ii. Else if lhsKind is varBinding, then
              [...]
          iii. Else,
               1. Assert: lhsKind is lexicalBinding.
               2. Assert: lhs is a ForDeclaration.
               3. Let status be the result of performing BindingInitialization
                  for lhs passing nextValue and iterationEnv as arguments.
          [...]
---*/

var iterCount = 0;

async function fn() {
  for await (const {a, b, ...{c, ...rest}} of [{a: 1, b: 2, c: 3, d: 4, e: 5}]) {
    assert.sameValue(a, 1);
    assert.sameValue(b, 2);
    assert.sameValue(c, 3);

    assert.sameValue(rest.d, 4);
    assert.sameValue(rest.e, 5);

    verifyEnumerable(rest, "d");
    verifyWritable(rest, "d");
    verifyConfigurable(rest, "d");

    verifyEnumerable(rest, "e");
    verifyWritable(rest, "e");
    verifyConfigurable(rest, "e");


    iterCount += 1;
  }
}

fn()
  .then(() => assert.sameValue(iterCount, 1, 'iteration occurred as expected'), $DONE)
  .then($DONE, $DONE);