JSTests/test262/test/built-ins/Temporal/PlainDate/from/order-of-operations.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.plaindate.from
description: Properties on an object passed to from() are accessed in the correct order
includes: [compareArray.js, temporalHelpers.js]
features: [Temporal]
---*/

const expected = [
  "get calendar",
  "get day",
  "get day.valueOf",
  "call day.valueOf",
  "get month",
  "get month.valueOf",
  "call month.valueOf",
  "get monthCode",
  "get monthCode.toString",
  "call monthCode.toString",
  "get year",
  "get year.valueOf",
  "call year.valueOf",
];
const actual = [];
const fields = {
  year: 1.7,
  month: 1.7,
  monthCode: "M01",
  day: 1.7,
};
const argument = new Proxy(fields, {
  get(target, key) {
    actual.push(`get ${key}`);
    if (key === "calendar") return Temporal.Calendar.from("iso8601");
    const result = target[key];
    return TemporalHelpers.toPrimitiveObserver(actual, result, key);
  },
  has(target, key) {
    actual.push(`has ${key}`);
    return key in target;
  },
});
const result = Temporal.PlainDate.from(argument);
TemporalHelpers.assertPlainDate(result, 1, 1, "M01", 1);
assert.sameValue(result.calendar.id, "iso8601", "calendar result");
assert.compareArray(actual, expected, "order of operations");