text: // Copyright (C) 2021 Igalia, S.L. All rights reserved.
  // This code is governed by the BSD license found in the LICENSE file.
  
  /*---
  esid: sec-temporal.plaintime.prototype.since
  description: TypeError thrown if time zone reports an offset that is not a Number
  features: [Temporal]
  includes: [temporalHelpers.js]
  ---*/
  
  [
    undefined,
    null,
    true,
    "+01:00",
    Symbol(),
    3600_000_000_000n,
    {},
    { valueOf() { return 3600_000_000_000; } },
  ].forEach((wrongOffset) => {
    const timeZone = TemporalHelpers.specificOffsetTimeZone(wrongOffset);
    const time = new Temporal.PlainTime(12, 34, 56, 987, 654, 321);
    const datetime = new Temporal.ZonedDateTime(1_000_000_000_987_654_321n, timeZone);
    assert.throws(TypeError, () => time.since(datetime));
  });
  