test262/test/built-ins/Temporal/PlainYearMonth/compare/use-internal-slots.js

// Copyright (C) 2020 Igalia, S.L. All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.

/*---
esid: sec-temporal.plainyearmonth.compare
description: compare() ignores the observable properties and uses internal slots
features: [Temporal]
---*/

function CustomError() {}

class AvoidGettersYearMonth extends Temporal.PlainYearMonth {
  get year() {
    throw new CustomError();
  }
  get month() {
    throw new CustomError();
  }
}

const one = new AvoidGettersYearMonth(2000, 5);
const two = new AvoidGettersYearMonth(2006, 3);
assert.sameValue(Temporal.PlainYearMonth.compare(one, two), -1);