text: // Copyright (C) 2021 the V8 project authors. All rights reserved.
  // This code is governed by the BSD license found in the LICENSE file.
  
  /*---
  esid: sec-temporal.calendar.prototype.dateadd
  description: Temporal.Calendar.prototype.dateAdd add duration with years and months and calculate correctly.
  info: |
    8. Let result be ? AddISODate(date.[[ISOYear]], date.[[ISOMonth]], date.[[ISODay]], duration.[[Years]], duration.[[Months]], duration.[[Weeks]], duration.[[Days]], overflow).
  features: [Temporal]
  includes: [temporalHelpers.js]
  ---*/
  let cal = new Temporal.Calendar("iso8601");
  
  let p1y2m = new Temporal.Duration(1,2);
  
  TemporalHelpers.assertPlainDate(
      cal.dateAdd("2021-07-16", p1y2m), 2022, 9, "M09", 16,
      "add one year and 2 months");
  TemporalHelpers.assertPlainDate(
      cal.dateAdd("2021-11-30", p1y2m), 2023, 1, "M01", 30,
      "add one year and 2 months roll into a new year");
  TemporalHelpers.assertPlainDate(
      cal.dateAdd("2021-12-31", p1y2m), 2023, 2, "M02", 28,
      "add one year and 2 months roll into a new year and constrain in Feb 28 of a non leap year");
  TemporalHelpers.assertPlainDate(
      cal.dateAdd("2022-12-31", p1y2m), 2024, 2, "M02", 29,
      "add one year and 2 months roll into a new year and constrain in Feb 29 of a leap year");
  