Add test for numeric hours with zero minutes and non-zero seconds

test/intl402/DurationFormat/prototype/format/numeric-hour-with-zero-minutes-and-non-zero-seconds.js

@@ -0,0 +1,41 @@
+// Copyright (C) 2023 André Bargull. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-Intl.DurationFormat.prototype.format
+description: >
+  The correct separator is used for numeric hours with zero minutes and non-zero seconds.
+locale: [en-US]
+features: [Intl.DurationFormat]
+---*/
+
+const df = new Intl.DurationFormat("en", {
+  // hours must be numeric, so that a time separator is used for the following units.
+  hours: "numeric",
+});
+
+const lf = new Intl.ListFormat("en", {
+  type: "unit",
+  style: "short",
+});
+
+const duration = {
+  hours: 1,
+
+  // Minutes is omitted from the output when its value is zero.
+  minutes: 0,
+
+  // Either seconds or sub-seconds must be non-zero.
+  seconds: 3,
+};
+
+const expected = lf.format([
+  new Intl.NumberFormat("en", {minimumIntegerDigits: 1}).format(duration.hours),
+  new Intl.NumberFormat("en", {minimumIntegerDigits: 2}).format(duration.seconds),
+]);
+
+assert.sameValue(
+  df.format(duration),
+  expected,
+  `No time separator is used when minutes is zero`
+);