1 files changed, 61 insertions, 0 deletions
diff --git a/deps/v8/test/intl/date-format/format-with-extensions.js b/deps/v8/test/intl/date-format/format-with-extensions.js
new file mode 100644
index 0000000000..b9eb0fcb1e
--- /dev/null
+++ b/deps/v8/test/intl/date-format/format-with-extensions.js
@@ -0,0 +1,61 @@
+// Copyright 2018 the V8 project authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+const d = new Date(2018, 5, 21); // 2018-06-21
+
+function checkFormat(locale, options, expected) {
+  let df = new Intl.DateTimeFormat(locale, options);
+  let resolvedOptions = df.resolvedOptions();
+  assertEquals(expected.cal, resolvedOptions.calendar);
+  assertEquals(expected.numSys, resolvedOptions.numberingSystem);
+
+  let formattedParts = df.formatToParts(d);
+  let formattedReconstructedFromParts = formattedParts.map((part) => part.value)
+      .reduce((accumulated, part) => accumulated + part);
+  let formatted = df.format(d);
+
+  assertEquals(formatted, formattedReconstructedFromParts);
+  assertEquals(expected.types, formattedParts.map((part) => part.type));
+  assertEquals(expected.formatted, formatted);
+}
+
+// Even though the calendar is Chinese, the best pattern search for formatting
+// should be done in the base locale (i.e. en or en-GB instead of
+// en-u-ca-chinese or en-GB-u-ca-chinese). Otherwise, {year: 'numeric'} would
+// results in '35 (wu-su)' where 'wu-su' is the designation for year 35 in the
+// 60-year cycle. See https://github.com/tc39/ecma402/issues/225 .
+[
+    ["en", "gregory", "latn", "2018"],
+    ["en-GB", "gregory", "latn", "2018"],
+    ["en-u-ca-chinese", "chinese", "latn", "35"],
+    ["en-GB-u-ca-chinese", "chinese", "latn", "35"],
+    ["en-u-ca-chinese-nu-deva", "chinese", "deva", "३५"],
+    ["en-GB-u-ca-chinese-nu-deva", "chinese", "deva", "३५"],
+].forEach(function(entry) {
+  checkFormat(entry[0], {year: 'numeric'},
+      { cal: entry[1],
+        numSys: entry[2],
+        formatted: entry[3],
+        types: ["year"],
+      });
+});
+
+const enUSTypes = ["month", "literal", "day", "literal", "year"];
+const enGBTypes = ["day", "literal", "month", "literal", "year"];
+
+[
+    ["en", "gregory", "latn", "6/21/2018", enUSTypes],
+    ["en-GB", "gregory", "latn", "21/06/2018", enGBTypes],
+    ["en-u-nu-deva", "gregory", "deva", "६/२१/२०१८", enUSTypes],
+    ["en-u-ca-chinese", "chinese", "latn", "5/8/35", enUSTypes],
+    ["en-GB-u-ca-chinese", "chinese", "latn", "08/05/35", enGBTypes],
+    ["en-u-ca-chinese-nu-deva", "chinese", "deva", "५/८/३५", enUSTypes],
+].forEach(function(entry) {
+  checkFormat(entry[0], {},
+      { cal: entry[1],
+        numSys: entry[2],
+        formatted: entry[3],
+        types: entry[4],
+      });
+});