1 files changed, 30 insertions, 0 deletions
diff --git a/js/src/tests/test262/intl402/Temporal/PlainDate/prototype/toLocaleString/calendar-mismatch.js b/js/src/tests/test262/intl402/Temporal/PlainDate/prototype/toLocaleString/calendar-mismatch.js
new file mode 100644
index 0000000000..14df21c029
--- /dev/null
+++ b/js/src/tests/test262/intl402/Temporal/PlainDate/prototype/toLocaleString/calendar-mismatch.js
@@ -0,0 +1,30 @@
+// |reftest| skip-if(!this.hasOwnProperty('Temporal')) -- Temporal is not enabled unconditionally
+// Copyright (C) 2023 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-temporal.plaindate.prototype.tolocalestring
+description: Calendar must match the locale calendar if not "iso8601"
+features: [Temporal, Intl-enumeration]
+---*/
+
+const localeCalendar = new Intl.DateTimeFormat().resolvedOptions().calendar;
+assert.notSameValue(localeCalendar, "iso8601", "no locale has the ISO calendar");
+
+const sameCalendarInstance = new Temporal.PlainDate(2000, 5, 2, localeCalendar);
+const result = sameCalendarInstance.toLocaleString();
+assert.sameValue(typeof result, "string", "toLocaleString() succeeds when instance has the same calendar as locale");
+
+const isoInstance = new Temporal.PlainDate(2000, 5, 2, "iso8601");
+assert.sameValue(isoInstance.toLocaleString(), result, "toLocaleString() succeeds when instance has the ISO calendar")
+
+// Pick a different calendar that is not ISO and not the locale's calendar
+const calendars = new Set(Intl.supportedValuesOf("calendar"));
+calendars.delete("iso8601");
+calendars.delete(localeCalendar);
+const differentCalendar = calendars.values().next().value;
+
+const differentCalendarInstance = new Temporal.PlainDate(2000, 5, 2, differentCalendar);
+assert.throws(RangeError, () => differentCalendarInstance.toLocaleString(), "calendar mismatch");
+
+reportCompare(0, 0);