1 files changed, 48 insertions, 0 deletions
diff --git a/js/src/tests/test262/built-ins/Temporal/Calendar/prototype/dateAdd/add-years-months-days.js b/js/src/tests/test262/built-ins/Temporal/Calendar/prototype/dateAdd/add-years-months-days.js
new file mode 100644
index 0000000000..1a7c932a3d
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+++ b/js/src/tests/test262/built-ins/Temporal/Calendar/prototype/dateAdd/add-years-months-days.js
@@ -0,0 +1,48 @@
+// |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, months and days 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 p1y2m4d = new Temporal.Duration(1,2,0,4);
+
+TemporalHelpers.assertPlainDate(
+    cal.dateAdd("2021-07-16", p1y2m4d), 2022, 9, "M09", 20,
+    "add one year two months and 4 days");
+TemporalHelpers.assertPlainDate(
+    cal.dateAdd("2021-02-27", p1y2m4d), 2022, 5, "M05", 1,
+    "add one year two months and 4 days and roll into new month from a month of 30 days");
+TemporalHelpers.assertPlainDate(
+    cal.dateAdd("2021-01-28", p1y2m4d), 2022, 4, "M04", 1,
+    "add one year two months and 4 days and roll into new month from a month of 31 days");
+TemporalHelpers.assertPlainDate(
+    cal.dateAdd("2021-02-26", p1y2m4d), 2022, 4, "M04", 30,
+    "add one year two months and 4 days which roll from March to April in a non leap year");
+TemporalHelpers.assertPlainDate(
+    cal.dateAdd("2023-02-26", p1y2m4d), 2024, 4, "M04", 30,
+    "add one year two months and 4 days which roll from March to April in a leap year");
+TemporalHelpers.assertPlainDate(
+    cal.dateAdd("2021-12-30", p1y2m4d), 2023, 3, "M03", 4,
+    "add one year two months and 4 days which roll month into new year and roll day into March in non leap year");
+TemporalHelpers.assertPlainDate(
+    cal.dateAdd("2022-12-30", p1y2m4d), 2024, 3, "M03", 4,
+    "add one year two months and 4 days which roll month into new year and roll day into March in leap year");
+TemporalHelpers.assertPlainDate(
+    cal.dateAdd("2022-12-29", p1y2m4d), 2024, 3, "M03", 4,
+    "add one year two months and 4 days which roll month into new year and roll day into March in leap year");
+TemporalHelpers.assertPlainDate(
+    cal.dateAdd("2021-07-30", p1y2m4d), 2022, 10, "M10", 4,
+    "add one year two months and 4 days which roll into a new month from a month with 30 days");
+TemporalHelpers.assertPlainDate(
+    cal.dateAdd("2021-06-30", p1y2m4d), 2022, 9, "M09", 3,
+    "add one year two months and 4 days which roll into a new month from a month with 31 days");
+
+reportCompare(0, 0);