1 files changed, 66 insertions, 0 deletions
diff --git a/js/src/tests/test262/built-ins/Temporal/Calendar/prototype/dateAdd/add-weeks.js b/js/src/tests/test262/built-ins/Temporal/Calendar/prototype/dateAdd/add-weeks.js
new file mode 100644
index 0000000000..671bd83bfe
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+++ b/js/src/tests/test262/built-ins/Temporal/Calendar/prototype/dateAdd/add-weeks.js
@@ -0,0 +1,66 @@
+// |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 weeks 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 p1w = new Temporal.Duration(0,0,1);
+let p6w = new Temporal.Duration(0,0,6);
+
+TemporalHelpers.assertPlainDate(
+    cal.dateAdd("2021-02-19", p1w), 2021, 2, "M02", 26,
+    "add one week in Feb");
+TemporalHelpers.assertPlainDate(
+    cal.dateAdd("2021-02-27", p1w), 2021, 3, "M03", 6,
+    "add one week in Feb and result in March");
+TemporalHelpers.assertPlainDate(
+    cal.dateAdd("2020-02-27", p1w), 2020, 3, "M03", 5,
+    "add one week in Feb and result in March in a leap year");
+TemporalHelpers.assertPlainDate(
+    cal.dateAdd("2021-12-24", p1w), 2021, 12, "M12", 31,
+    "add one week and result in the last day of a year");
+TemporalHelpers.assertPlainDate(
+    cal.dateAdd("2021-12-25", p1w), 2022, 1, "M01", 1,
+    "add one week and result in the first day of next year");
+
+TemporalHelpers.assertPlainDate(
+    cal.dateAdd("2021-01-27", p1w), 2021, 2, "M02", 3,
+    "add one week and result in next month from a month with 31 days");
+TemporalHelpers.assertPlainDate(
+    cal.dateAdd("2021-06-27", p1w), 2021, 7, "M07", 4,
+    "add one week and result in next month from a month with 30 days");
+TemporalHelpers.assertPlainDate(
+    cal.dateAdd("2021-07-27", p1w), 2021, 8, "M08", 3,
+    "add one week and result in next month from a month with 31 days");
+
+TemporalHelpers.assertPlainDate(
+    cal.dateAdd("2021-02-19", p6w), 2021, 4, "M04", 2,
+    "add six weeks and result in next month from Feb in a non leap year");
+TemporalHelpers.assertPlainDate(
+    cal.dateAdd("2020-02-19", p6w), 2020, 4, "M04", 1,
+    "add six weeks and result in next month from Feb in a leap year");
+TemporalHelpers.assertPlainDate(
+    cal.dateAdd("2021-12-24", p6w), 2022, 2, "M02", 4,
+    "add six weeks and result in the next year");
+TemporalHelpers.assertPlainDate(
+    cal.dateAdd("2021-01-27", p6w), 2021, 3, "M03", 10,
+    "add six weeks and result in the same year");
+TemporalHelpers.assertPlainDate(
+    cal.dateAdd("2020-01-27", p6w), 2020, 3, "M03", 9,
+    "add six weeks and result in the same year");
+TemporalHelpers.assertPlainDate(
+    cal.dateAdd("2021-06-27", p6w), 2021, 8, "M08", 8,
+    "add six weeks and result in the same year crossing month of 30 and 31 days");
+TemporalHelpers.assertPlainDate(
+    cal.dateAdd("2021-07-27", p6w), 2021, 9, "M09", 7,
+    "add six weeks and result in the same year crossing month of 31 and 31 days");
+
+reportCompare(0, 0);