1 files changed, 39 insertions, 0 deletions
diff --git a/js/src/tests/test262/built-ins/Temporal/Calendar/prototype/dateAdd/add-days.js b/js/src/tests/test262/built-ins/Temporal/Calendar/prototype/dateAdd/add-days.js
new file mode 100644
index 0000000000..edf4f9b2f4
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+++ b/js/src/tests/test262/built-ins/Temporal/Calendar/prototype/dateAdd/add-days.js
@@ -0,0 +1,39 @@
+// |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 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 p10d = new Temporal.Duration(0,0,0,10);
+
+TemporalHelpers.assertPlainDate(
+    cal.dateAdd("2021-07-16", p10d), 2021, 7, "M07", 26,
+    "add 10 days and result into the same  month");
+TemporalHelpers.assertPlainDate(
+    cal.dateAdd("2021-07-26", p10d), 2021, 8, "M08", 5,
+    "add 10 days and result into next month");
+TemporalHelpers.assertPlainDate(
+    cal.dateAdd("2021-12-26", p10d), 2022, 1, "M01", 5,
+    "add 10 days and result into next year");
+TemporalHelpers.assertPlainDate(
+    cal.dateAdd("2020-02-26", p10d), 2020, 3, "M03", 7,
+    "add 10 days from a leap year in Feb and result into March");
+TemporalHelpers.assertPlainDate(
+    cal.dateAdd("2021-02-26", p10d), 2021, 3, "M03", 8,
+    "add 10 days from a non leap year in Feb and result into March");
+TemporalHelpers.assertPlainDate(
+    cal.dateAdd("2020-02-19", p10d), 2020, 2, "M02", 29,
+    "add 10 days from a leap year in Feb 19 and result into Feb 29");
+TemporalHelpers.assertPlainDate(
+    cal.dateAdd("2021-02-19", p10d), 2021, 3, "M03", 1,
+    "add 10 days from a non leap year in Feb 19 and result into March 1");
+
+reportCompare(0, 0);