summaryrefslogtreecommitdiffstats
path: root/js/src/tests/test262/language/statements/generators/dstr/dflt-obj-ptrn-rest-getter.js
blob: 0b2e08c505bdcbc5fe0dded602d7432c2d22c824 (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
// This file was procedurally generated from the following sources:
// - src/dstr-binding/obj-ptrn-rest-getter.case
// - src/dstr-binding/default/gen-func-decl-dflt.template
/*---
description: Getter is called when obj is being deconstructed to a rest Object (generator function declaration (default parameter))
esid: sec-generator-function-definitions-runtime-semantics-instantiatefunctionobject
features: [object-rest, generators, destructuring-binding, default-parameters]
flags: [generated]
includes: [propertyHelper.js]
info: |
    GeneratorDeclaration : function * ( FormalParameters ) { GeneratorBody }

        [...]
        2. Let F be GeneratorFunctionCreate(Normal, FormalParameters,
           GeneratorBody, scope, strict).
        [...]

    9.2.1 [[Call]] ( thisArgument, argumentsList)

    [...]
    7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
    [...]

    9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )

    1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
    [...]

    9.2.12 FunctionDeclarationInstantiation(func, argumentsList)

    [...]
    23. Let iteratorRecord be Record {[[iterator]]:
        CreateListIterator(argumentsList), [[done]]: false}.
    24. If hasDuplicates is true, then
        [...]
    25. Else,
        b. Let formalStatus be IteratorBindingInitialization for formals with
           iteratorRecord and env as arguments.
    [...]
---*/
var count = 0;

var callCount = 0;
function* f({...x} = { get v() { count++; return 2; } }) {
  assert.sameValue(count, 1);

  verifyProperty(x, "v", {
    enumerable: true,
    writable: true,
    configurable: true,
    value: 2
  });
  callCount = callCount + 1;
};
f().next();
assert.sameValue(callCount, 1, 'generator function invoked exactly once');

reportCompare(0, 0);