summaryrefslogtreecommitdiffstats
path: root/js/src/tests/test262/language/statements/for-await-of/async-gen-dstr-var-ary-ptrn-rest-obj-prop-id.js
blob: c83b9f89af20576d3cc7615789493655d6d3fb06 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
// |reftest| async
// This file was procedurally generated from the following sources:
// - src/dstr-binding-for-await/ary-ptrn-rest-obj-prop-id.case
// - src/dstr-binding-for-await/default/for-await-of-async-gen-var.template
/*---
description: Rest element containing an object binding pattern (for-await-of statement)
esid: sec-for-in-and-for-of-statements-runtime-semantics-labelledevaluation
features: [destructuring-binding, async-iteration]
flags: [generated, async]
info: |
    IterationStatement :
        for await ( var ForBinding of AssignmentExpression ) Statement

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

    13.7.5.13 Runtime Semantics: ForIn/OfBodyEvaluation

    [...]
    4. Let destructuring be IsDestructuring of lhs.
    [...]
    6. Repeat
       [...]
       j. If destructuring is false, then
          [...]
       k. Else
          i. If lhsKind is assignment, then
             [...]
          ii. Else if lhsKind is varBinding, then
              1. Assert: lhs is a ForBinding.
              2. Let status be the result of performing BindingInitialization
                 for lhs passing nextValue and undefined as the arguments.
          [...]

    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.
       [...]
---*/
let length = "outer";

var iterCount = 0;

async function *fn() {
  for await (var [...{ 0: v, 1: w, 2: x, 3: y, length: z }] of [[7, 8, 9]]) {
    assert.sameValue(v, 7);
    assert.sameValue(w, 8);
    assert.sameValue(x, 9);
    assert.sameValue(y, undefined);
    assert.sameValue(z, 3);

    assert.sameValue(length, "outer", "the length prop is not set as a binding name");

    iterCount += 1;
  }
}

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