1 files changed, 49 insertions, 0 deletions
diff --git a/js/src/tests/test262/built-ins/Temporal/ZonedDateTime/prototype/hoursInDay/getpossibleinstantsfor-out-of-range-backward-offset-shift.js b/js/src/tests/test262/built-ins/Temporal/ZonedDateTime/prototype/hoursInDay/getpossibleinstantsfor-out-of-range-backward-offset-shift.js
new file mode 100644
index 0000000000..566b61b2b0
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+++ b/js/src/tests/test262/built-ins/Temporal/ZonedDateTime/prototype/hoursInDay/getpossibleinstantsfor-out-of-range-backward-offset-shift.js
@@ -0,0 +1,49 @@
+// |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.zoneddatetime.prototype.hoursinday
+description: >
+  UTC offset shift returned by getPossibleInstantsFor can be at most 24 hours.
+features: [Temporal]
+info: |
+  GetPossibleInstantsFor:
+  5.b.i. Let _numResults_ be _list_'s length.
+  ii. If _numResults_ > 1, then
+    1. Let _epochNs_ be a new empty List.
+    2. For each value _instant_ in list, do
+      a. Append _instant_.[[EpochNanoseconds]] to the end of the List _epochNs_.
+    3. Let _min_ be the least element of the List _epochNs_.
+    4. Let _max_ be the greatest element of the List _epochNs_.
+    5. If abs(ℝ(_max_ - _min_)) > nsPerDay, throw a *RangeError* exception.
+---*/
+
+class ShiftLonger24Hour extends Temporal.TimeZone {
+  id = 'TestTimeZone';
+
+  constructor() {
+    super('UTC');
+  }
+
+  getOffsetNanosecondsFor(instant) {
+    return 0;
+  }
+
+  getPossibleInstantsFor(plainDateTime) {
+    const utc = new Temporal.TimeZone("UTC");
+    const [utcInstant] = utc.getPossibleInstantsFor(plainDateTime);
+    return [
+      utcInstant.subtract({ hours: 12, nanoseconds: 1 }),
+      utcInstant.add({ hours: 12 }),
+      utcInstant, // add a third value in case the implementation doesn't sort
+    ];
+  }
+}
+
+const timeZone = new ShiftLonger24Hour();
+
+const instance = new Temporal.ZonedDateTime(0n, timeZone);
+assert.throws(RangeError, () => instance.hoursInDay, "RangeError should be thrown");
+
+reportCompare(0, 0);