summaryrefslogtreecommitdiffstats
path: root/js/src/tests/test262/language/statements/async-generator/dstr/dflt-ary-ptrn-rest-id.js
blob: 39b0da87013f13ea4dc36bce6799dcddb4f0dd3a (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
// |reftest| async
// This file was procedurally generated from the following sources:
// - src/dstr-binding/ary-ptrn-rest-id.case
// - src/dstr-binding/default/async-gen-func-decl-dflt.template
/*---
description: Lone rest element (async generator function declaration (default parameter))
esid: sec-asyncgenerator-definitions-instantiatefunctionobject
features: [async-iteration]
flags: [generated, async]
info: |
    AsyncGeneratorDeclaration : async [no LineTerminator here] function * BindingIdentifier
        ( FormalParameters ) { AsyncGeneratorBody }

        [...]
        3. Let F be ! AsyncGeneratorFunctionCreate(Normal, FormalParameters, AsyncGeneratorBody,
            scope, strict).
        [...]


    13.3.3.6 Runtime Semantics: IteratorBindingInitialization
    BindingRestElement : ... BindingIdentifier
    [...] 3. Let A be ArrayCreate(0). [...] 5. Repeat
       [...]
       f. Let status be CreateDataProperty(A, ToString (n), nextValue).
       [...]
---*/
var values = [1, 2, 3];


var callCount = 0;
async function* f([...x] = values) {
  assert(Array.isArray(x));
  assert.sameValue(x.length, 3);
  assert.sameValue(x[0], 1);
  assert.sameValue(x[1], 2);
  assert.sameValue(x[2], 3);
  assert.notSameValue(x, values);
  callCount = callCount + 1;
};
f().next().then(() => {
    assert.sameValue(callCount, 1, 'invoked exactly once');
}).then($DONE, $DONE);