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// Copyright (C) 2021 Igalia S.L. All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.
/*---
esid: sec-intl.numberformat.prototype.format
description: >
Tests that Intl.NumberFormat.prototype.format calls
OrdinaryHasInstance instead of the instanceof operator which includes a
Symbol.hasInstance lookup and call among other things.
info: >
UnwrapNumberFormat ( nf )
2. If nf does not have an [[InitializedNumberFormat]] internal slot and
? OrdinaryHasInstance(%NumberFormat%, nf) is true, then
a. Return ? Get(nf, %Intl%.[[FallbackSymbol]]).
---*/
const nf = Object.create(Intl.NumberFormat.prototype);
Object.defineProperty(Intl.NumberFormat, Symbol.hasInstance, {
get() { throw new Test262Error(); }
});
assert.throws(TypeError, () => nf.format);
reportCompare(0, 0);
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