/built-ins/TypedArrayConstructors/internals/Set/key-is-minus-zero.js Hermes test262 report

Strict mode Failing

Expected no error, got ESHostError: sample.hasOwnProperty("-0") must return false Expected SameValue(«true», «false») to be true (Testing with Float64Array.)

non-Strict mode Failing

Expected no error, got ESHostError: sample.hasOwnProperty("-0") must return false Expected SameValue(«true», «false») to be true (Testing with Float64Array.)

Features:

align-detached-buffer-semantics-with-web-reality
Reflect
TypedArray

Source code

// Copyright (C) 2016 the V8 project authors. All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.
/*---
esid: sec-integer-indexed-exotic-objects-set-p-v-receiver
description: >
  Returns true, even if index is -0
info: |
  9.4.5.5 [[Set]] ( P, V, Receiver)

  ...
  2. If Type(P) is String, then
    a. Let numericIndex be ! CanonicalNumericIndexString(P).
    b. If numericIndex is not undefined, then
      i. Perform ? IntegerIndexedElementSet(O, numericIndex, V).
      ii. Return true.
  ...

includes: [testTypedArray.js]
features: [align-detached-buffer-semantics-with-web-reality, Reflect, TypedArray]
---*/

testWithTypedArrayConstructors(function(TA) {
  var sample = new TA([42]);

  assert.sameValue(Reflect.set(sample, "-0", 1), true, 'Reflect.set(sample, "-0", 1) must return true');
  assert.sameValue(sample.hasOwnProperty("-0"), false, 'sample.hasOwnProperty("-0") must return false');
});

Loading source code from GitHub

key-is-minus-zero.js on GitHub