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// Copyright 2026 Igalia, S.L. All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.
/*---
esid: sec-intl.numberformat
description: Property descriptor of %Intl%.[[FallbackSymbol]]
info: |
ChainNumberFormat ( numberFormat, newTarget, this )
1.a. Perform ? DefinePropertyOrThrow(_this_, %Intl%.[[FallbackSymbol]],
PropertyDescriptor{ [[Value]]: _numberFormat_, [[Writable]]: *false*,
[[Enumerable]]: *false*, [[Configurable]]: *false* }).
includes: [propertyHelper.js]
features: [intl-normative-optional]
---*/
const object = Object.create(Intl.NumberFormat.prototype);
const fallbackNF = Intl.NumberFormat.call(object);
assert.sameValue(object, fallbackNF, "return value of Intl.NumberFormat constructor");
const symbolProps = Object.getOwnPropertySymbols(fallbackNF);
const fallbackSymbol = symbolProps.find((sym) => sym.description === "IntlLegacyConstructedSymbol");
assert(
fallbackNF[fallbackSymbol] instanceof Intl.NumberFormat,
"value of legacy symbol property must be an Intl.NumberFormat"
);
verifyProperty(
fallbackNF,
fallbackSymbol,
{
writable: false,
enumerable: false,
configurable: false
},
{ label: "%Intl%.[[FallbackSymbol]]" }
);
reportCompare(0, 0);