1 files changed, 28 insertions, 0 deletions
diff --git a/js/src/tests/test262/staging/Temporal/Instant/old/toZonedDateTimeISO.js b/js/src/tests/test262/staging/Temporal/Instant/old/toZonedDateTimeISO.js
new file mode 100644
index 0000000000..2fbaad8b9d
--- /dev/null
+++ b/js/src/tests/test262/staging/Temporal/Instant/old/toZonedDateTimeISO.js
@@ -0,0 +1,28 @@
+// |reftest| skip-if(!this.hasOwnProperty('Temporal')) -- Temporal is not enabled unconditionally
+// Copyright (C) 2018 Bloomberg LP. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-temporal-instant-objects
+description: Temporal.Instant.toZonedDateTimeISO() works
+features: [Temporal]
+---*/
+
+var inst = Temporal.Instant.from("1976-11-18T14:23:30.123456789Z");
+
+// throws without parameter
+assert.throws(TypeError, () => inst.toZonedDateTimeISO());
+
+// time zone parameter UTC
+var tz = Temporal.TimeZone.from("UTC");
+var zdt = inst.toZonedDateTimeISO(tz);
+assert.sameValue(inst.epochNanoseconds, zdt.epochNanoseconds);
+assert.sameValue(`${ zdt }`, "1976-11-18T14:23:30.123456789+00:00[UTC]");
+
+// time zone parameter non-UTC
+var tz = Temporal.TimeZone.from("-05:00");
+var zdt = inst.toZonedDateTimeISO(tz);
+assert.sameValue(inst.epochNanoseconds, zdt.epochNanoseconds);
+assert.sameValue(`${ zdt }`, "1976-11-18T09:23:30.123456789-05:00[-05:00]");
+
+reportCompare(0, 0);