1 files changed, 26 insertions, 0 deletions
diff --git a/js/src/tests/test262/built-ins/Temporal/Calendar/prototype/dateUntil/leap-second.js b/js/src/tests/test262/built-ins/Temporal/Calendar/prototype/dateUntil/leap-second.js
new file mode 100644
index 0000000000..e40554c226
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Temporal/Calendar/prototype/dateUntil/leap-second.js
@@ -0,0 +1,26 @@
+// |reftest| skip-if(!this.hasOwnProperty('Temporal')) -- Temporal is not enabled unconditionally
+// Copyright (C) 2022 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-temporal.calendar.prototype.dateuntil
+description: Leap second is a valid ISO string for PlainDate
+includes: [temporalHelpers.js]
+features: [Temporal]
+---*/
+
+const instance = new Temporal.Calendar("iso8601");
+
+let arg = "2016-12-31T23:59:60";
+let result = instance.dateUntil(arg, new Temporal.PlainDate(2017, 1, 1));
+TemporalHelpers.assertDuration(result, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, "leap second is a valid ISO string for PlainDate (first argument)");
+result = instance.dateUntil(new Temporal.PlainDate(2017, 1, 1), arg);
+TemporalHelpers.assertDuration(result, 0, 0, 0, -1, 0, 0, 0, 0, 0, 0, "leap second is a valid ISO string for PlainDate (second argument)");
+
+arg = { year: 2016, month: 12, day: 31, hour: 23, minute: 59, second: 60 };
+result = instance.dateUntil(arg, new Temporal.PlainDate(2017, 1, 1));
+TemporalHelpers.assertDuration(result, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, "second: 60 is ignored in property bag for PlainDate (first argument)");
+result = instance.dateUntil(new Temporal.PlainDate(2017, 1, 1), arg);
+TemporalHelpers.assertDuration(result, 0, 0, 0, -1, 0, 0, 0, 0, 0, 0, "second: 60 is ignored in property bag for PlainDate (second argument)");
+
+reportCompare(0, 0);