1 files changed, 40 insertions, 0 deletions
diff --git a/js/src/tests/test262/intl402/DateTimeFormat/prototype/formatRangeToParts/pattern-on-calendar.js b/js/src/tests/test262/intl402/DateTimeFormat/prototype/formatRangeToParts/pattern-on-calendar.js
new file mode 100644
index 0000000000..f36730d122
--- /dev/null
+++ b/js/src/tests/test262/intl402/DateTimeFormat/prototype/formatRangeToParts/pattern-on-calendar.js
@@ -0,0 +1,40 @@
+// Copyright 2019 Google Inc.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-createdatetimeformat
+description: >
+  Checks the DateTimeFormat choose different patterns based
+  on calendar.
+includes: [testIntl.js]
+features: [Intl.DateTimeFormat-formatRange]
+locale: [en]
+---*/
+
+let calendars = allCalendars();
+let date1 = new Date(2017, 3, 12);
+let date2 = new Date();
+
+// serialize parts to a string by considering only the type and literal.
+function serializeTypesAndLiteral(parts) {
+  let types = parts.map(part => {
+    if (part.type == "literal") {
+      return `${part.type}(${part.value})`;
+    }
+    return part.type;
+  });
+  return types.join(":");
+}
+
+let df = new Intl.DateTimeFormat("en");
+let base  = serializeTypesAndLiteral(df.formatRangeToParts(date1, date2));
+
+const foundDifferentPattern = calendars.some(function(calendar) {
+  let cdf = new Intl.DateTimeFormat("en-u-ca-" + calendar);
+  return base != serializeTypesAndLiteral(cdf.formatRangeToParts(date1, date2));
+});
+
+// Expect at least some calendar use different pattern.
+assert.sameValue(foundDifferentPattern, true);
+
+reportCompare(0, 0);