summaryrefslogtreecommitdiff
path: root/test/built-ins/GeneratorFunction/has-instance.js
blob: 3b5ad67f80d6aa2951848dcdd13b90845b66605a (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
// Copyright (C) 2013 the V8 project authors. All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.
/*---
es6id: 25.2
description: >
    Generator function instances are correctly reported as instances of the
    GeneratorFunction intrinsic.
features: [generators]
---*/

var GeneratorFunction = Object.getPrototypeOf(function*() {}).constructor;

function* gDecl() {}
var gExpr = function*() {};

assert(
  gDecl instanceof GeneratorFunction,
  'Generators created via GeneratorDeclaration syntax are proper instances of GeneratorFunction'
);

assert(
  gExpr instanceof GeneratorFunction,
  'Generators created via GeneratorExpression syntax are proper instances of GeneratorFunction'
);

assert(
  new GeneratorFunction() instanceof GeneratorFunction,
  'Generators created via constructor invocation of GeneratorFunction are proper instances of GeneratorFunction'
);

assert(
  GeneratorFunction() instanceof GeneratorFunction,
  'Generators created via function invocation of GeneratorFunction are proper instances of GeneratorFunction'
);