1 files changed, 30 insertions, 0 deletions
diff --git a/js/src/tests/test262/built-ins/Temporal/Calendar/prototype/dateAdd/add-years-months.js b/js/src/tests/test262/built-ins/Temporal/Calendar/prototype/dateAdd/add-years-months.js
new file mode 100644
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+++ b/js/src/tests/test262/built-ins/Temporal/Calendar/prototype/dateAdd/add-years-months.js
@@ -0,0 +1,30 @@
+// |reftest| skip-if(!this.hasOwnProperty('Temporal')) -- Temporal is not enabled unconditionally
+// 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");
+
+reportCompare(0, 0);