1 files changed, 58 insertions, 0 deletions
diff --git a/js/src/tests/non262/Intl/DateTimeFormat/fractional-second-digits-append-item.js b/js/src/tests/non262/Intl/DateTimeFormat/fractional-second-digits-append-item.js
new file mode 100644
index 0000000000..0ef5540179
--- /dev/null
+++ b/js/src/tests/non262/Intl/DateTimeFormat/fractional-second-digits-append-item.js
@@ -0,0 +1,58 @@
+// |reftest| skip-if(!this.hasOwnProperty("Intl"))
+
+const {
+  DayPeriod, Hour, Minute, Second, FractionalSecond, Literal
+} = DateTimeFormatParts
+
+const tests = [
+  // https://unicode-org.atlassian.net/browse/CLDR-13184
+  // https://unicode-org.atlassian.net/browse/CLDR-13623
+  {
+    locale: "en",
+    date: new Date("2020-01-01T00:00:00.123"),
+    options: {hour: "numeric", fractionalSecondDigits: 3},
+    parts: [
+      Hour("12"),
+      Literal(" "),
+      DayPeriod("AM"),
+      Literal(" (Fractional Second: "),
+      FractionalSecond("123"),
+      Literal(")")
+    ]
+  },
+
+  // https://unicode-org.atlassian.net/browse/ICU-20992
+  {
+    locale: "ckb-IR",
+    date: new Date("2020-01-01T00:00:00.123"),
+    options: {minute: "2-digit", fractionalSecondDigits: 3},
+    parts: [
+      Minute("٠٠"),
+      Literal(":"),
+      Second("٠٠"),
+      Literal("٫"),
+      FractionalSecond("١٢٣"),
+    ]
+  },
+
+  // https://unicode-org.atlassian.net/browse/ICU-20992
+  {
+    locale: "ckb-IR",
+    date: new Date("2020-01-01T00:00:00.123"),
+    options: {dayPeriod: "short", fractionalSecondDigits: 3},
+    parts: [
+      FractionalSecond("١٢٣"),
+      Literal(" (Dayperiod: "),
+      DayPeriod("ب.ن"),
+      Literal(")")
+    ]
+  },
+];
+
+for (let {locale, date, options, parts} of tests) {
+  let dtf = new Intl.DateTimeFormat(locale, options);
+  assertParts(dtf, date, parts);
+}
+
+if (typeof reportCompare === "function")
+  reportCompare(0, 0, "ok");