text: // Copyright (C) 2022 Igalia, S.L. All rights reserved.
  // This code is governed by the BSD license found in the LICENSE file.
  
  /*---
  esid: sec-temporal.duration.prototype.subtract
  description: >
      Conversion of ISO date-time strings as relativeTo option to
      Temporal.ZonedDateTime or Temporal.PlainDateTime instances
  includes: [temporalHelpers.js]
  features: [Temporal]
  ---*/
  
  const instance = new Temporal.Duration(1, 0, 0, 1);
  
  let relativeTo = "2019-11-01T00:00[America/Vancouver]";
  const result4 = instance.subtract(new Temporal.Duration(0, 0, 0, 0, 24), { relativeTo });
  TemporalHelpers.assertDuration(result4, 1, 0, 0, 0, 1, 0, 0, 0, 0, 0, "date-time + IANA annotation is a zoned relativeTo");
  
  relativeTo = "2019-11-01T00:00Z[America/Vancouver]";
  const result5 = instance.subtract(new Temporal.Duration(0, 0, 0, 0, 24), { relativeTo });
  TemporalHelpers.assertDuration(result5, 1, 0, 0, 0, 1, 0, 0, 0, 0, 0, "date-time + Z + IANA annotation is a zoned relativeTo");
  
  relativeTo = "2019-11-01T00:00-07:00[America/Vancouver]";
  const result6 = instance.subtract(new Temporal.Duration(0, 0, 0, 0, 24), { relativeTo });
  TemporalHelpers.assertDuration(result6, 1, 0, 0, 0, 1, 0, 0, 0, 0, 0, "date-time + offset + IANA annotation is a zoned relativeTo");
  
  relativeTo = "2019-11-01T00:00+04:15[America/Vancouver]";
  assert.throws(RangeError, () => instance.subtract(new Temporal.Duration(0, 0, 0, 0, 24), { relativeTo }), "date-time + offset + IANA annotation throws if wall time and exact time mismatch");
  