1 files changed, 29 insertions, 0 deletions
diff --git a/js/src/tests/non262/Intl/DateTimeFormat/japanese-gannen-year.js b/js/src/tests/non262/Intl/DateTimeFormat/japanese-gannen-year.js
new file mode 100644
index 0000000000..81ee054b0a
--- /dev/null
+++ b/js/src/tests/non262/Intl/DateTimeFormat/japanese-gannen-year.js
@@ -0,0 +1,29 @@
+// |reftest| skip-if(!this.hasOwnProperty("Intl"))
+
+var dtf = new Intl.DateTimeFormat("ja-u-ca-japanese", {
+    era: "short",
+    timeZone: "Asia/Tokyo",
+});
+
+var endShowa = new Date("1989-01-07T00:00:00.000Z");
+var startHeisei = new Date("1989-01-08T00:00:00.000Z");
+
+assertEq(dtf.format(endShowa), "昭和64年1月7日");
+assertEq(dtf.format(startHeisei), "平成元年1月8日");
+
+var parts = dtf.formatToParts(startHeisei);
+assertEq(parts.filter(p => p.type === "era")[0].value, "平成");
+assertEq(parts.filter(p => p.type === "year")[0].value, "元");
+
+// ICU returns mixed numbers when an explicit numbering system is present.
+
+var dtf = new Intl.DateTimeFormat("ja-u-ca-japanese-nu-arab", {
+    era: "short",
+    timeZone: "Asia/Tokyo",
+});
+
+assertEq(dtf.format(endShowa), "昭和64年١月٧日");
+assertEq(dtf.format(startHeisei), "平成元年١月٨日");
+
+if (typeof reportCompare === "function")
+    reportCompare(0, 0);