js/src/tests/test262/built-ins/Iterator/prototype/map/get-return-method-throws.js


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

// |reftest| shell-option(--enable-iterator-helpers) skip-if(!this.hasOwnProperty('Iterator')||!xulRuntime.shell) -- iterator-helpers is not enabled unconditionally, requires shell-options
// Copyright (C) 2023 Michael Ficarra. All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.
/*---
esid: sec-iteratorprototype.map
description: >
  Underlying iterator return is throwing getter
info: |
  %Iterator.prototype%.map ( mapper )

features: [iterator-helpers]
flags: []
---*/
class TestIterator extends Iterator {
  next() {
    return {
      done: false,
      value: 1,
    };
  }
  get return() {
    throw new Test262Error();
  }
}

let iterator = new TestIterator().map(() => 0);
iterator.next();

assert.throws(Test262Error, function () {
  iterator.return();
});

reportCompare(0, 0);