1 files changed, 29 insertions, 0 deletions
diff --git a/js/src/tests/test262/built-ins/Temporal/ZonedDateTime/prototype/withPlainTime/leap-second.js b/js/src/tests/test262/built-ins/Temporal/ZonedDateTime/prototype/withPlainTime/leap-second.js
new file mode 100644
index 0000000000..79685eb7ca
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Temporal/ZonedDateTime/prototype/withPlainTime/leap-second.js
@@ -0,0 +1,29 @@
+// |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.zoneddatetime.prototype.withplaintime
+description: Leap second is a valid ISO string for PlainTime
+features: [Temporal]
+---*/
+
+const instance = new Temporal.ZonedDateTime(1_000_000_000_000_000_000n, "UTC");
+
+let arg = "2016-12-31T23:59:60";
+const result1 = instance.withPlainTime(arg);
+assert.sameValue(
+  result1.epochNanoseconds,
+  1000079999_000_000_000n,
+  "leap second is a valid ISO string for PlainTime"
+);
+
+arg = { year: 2016, month: 12, day: 31, hour: 23, minute: 59, second: 60 };
+const result2 = instance.withPlainTime(arg);
+assert.sameValue(
+  result2.epochNanoseconds,
+  1000079999_000_000_000n,
+  "second: 60 is ignored in property bag for PlainTime"
+);
+
+reportCompare(0, 0);