1 files changed, 30 insertions, 0 deletions
diff --git a/js/src/tests/test262/intl402/Temporal/PlainDate/prototype/yearOfWeek/gregory-iso-weekofyear.js b/js/src/tests/test262/intl402/Temporal/PlainDate/prototype/yearOfWeek/gregory-iso-weekofyear.js
new file mode 100644
index 0000000000..d8556f309a
--- /dev/null
+++ b/js/src/tests/test262/intl402/Temporal/PlainDate/prototype/yearOfWeek/gregory-iso-weekofyear.js
@@ -0,0 +1,30 @@
+// |reftest| skip-if(!this.hasOwnProperty('Temporal')) -- Temporal is not enabled unconditionally
+// Copyright (C) 2024 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-temporal.plaindate.prototype.yearofweek
+description: >
+  In the ISO 8601 week calendar, calendar week number 1 of a calendar year is 
+  the week including the first Thursday of that year (based on the principle 
+  that a week belongs to the same calendar year as the majority of its calendar 
+  days). Because of this, some calendar days of the first calendar week of a 
+  calendar year may be part of the preceding date calendar year, and some 
+  calendar days of the last calendar week of a calendar year may be part of
+  the next calendar year.
+features: [Temporal]
+---*/
+
+// 
+
+let calendar = new Temporal.Calendar("gregory");
+const date = new Temporal.PlainDate(2021, 1, 1, calendar);
+
+assert.sameValue(date.yearOfWeek, 2021);
+
+calendar = new Temporal.Calendar("iso8601");
+const isodate = new Temporal.PlainDate(2021, 1, 1, calendar);
+
+assert.sameValue(isodate.yearOfWeek, 2020);
+
+reportCompare(0, 0);