JSTests/test262/test/built-ins/Temporal/Instant/prototype/toString/options-undefined.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.instant.prototype.tostring
includes: [compareArray.js]
description: Verify that undefined options are handled correctly.
features: [Temporal]
---*/

const actual = [];
const expected = [];

const instant = Temporal.Instant.from("1975-02-02T14:25:36.12345Z");

Object.defineProperty(Temporal.TimeZone, "from", {
  get() {
    actual.push("get Temporal.TimeZone.from");
    return function(identifier) {
      actual.push("call Temporal.TimeZone.from");
      assert.sameValue(identifier, "UTC");
    };
  },
});

assert.sameValue(
  instant.toString(),
  "1975-02-02T14:25:36.12345Z",
  "default time zone is none, precision is auto, and rounding is trunc"
);
assert.compareArray(actual, expected);

assert.sameValue(
  instant.toString(undefined),
  "1975-02-02T14:25:36.12345Z",
  "default time zone is none, precision is auto, and rounding is trunc"
);
assert.compareArray(actual, expected);