1 files changed, 102 insertions, 0 deletions
diff --git a/js/src/tests/non262/Intl/DateTimeFormat/day-period-hour-cycle.js b/js/src/tests/non262/Intl/DateTimeFormat/day-period-hour-cycle.js
new file mode 100644
index 0000000000..6bfbf94df3
--- /dev/null
+++ b/js/src/tests/non262/Intl/DateTimeFormat/day-period-hour-cycle.js
@@ -0,0 +1,102 @@
+// |reftest| skip-if(!this.hasOwnProperty("Intl"))
+
+const {
+    Year, Month, Day, DayPeriod, Hour, Minute, Literal
+} = DateTimeFormatParts;
+
+// If the locale defaults to a 24-hour-cycle, the "dayPeriod" option is ignored if an "hour" option
+// is also present, unless the hour-cycle is manually set to a 12-hour-cycle.
+
+const tests = [
+    {
+        date: new Date("2019-01-01T12:00:00"),
+        options: { dayPeriod: "short", hour: "numeric", },
+        locales: {
+            en: [Hour("12"), Literal(" "), DayPeriod("noon")],
+            de: [Hour("12"), Literal(" Uhr")],
+        },
+    },
+    {
+        date: new Date("2019-01-01T12:00:00"),
+        options: { dayPeriod: "short", hour: "numeric", hour12: true },
+        locales: {
+            en: [Hour("12"), Literal(" "), DayPeriod("noon")],
+            de: [Hour("12"), Literal(" "), DayPeriod("mittags")],
+        },
+    },
+    {
+        date: new Date("2019-01-01T12:00:00"),
+        options: { dayPeriod: "short", hour: "numeric", hour12: false },
+        locales: {
+            en: [Hour("12")],
+            de: [Hour("12"), Literal(" Uhr")],
+        },
+    },
+    {
+        date: new Date("2019-01-01T12:00:00"),
+        options: { dayPeriod: "short", hour: "numeric", hourCycle: "h12" },
+        locales: {
+            en: [Hour("12"), Literal(" "), DayPeriod("noon")],
+            de: [Hour("12"), Literal(" "), DayPeriod("mittags")],
+        },
+    },
+    {
+        date: new Date("2019-01-01T12:00:00"),
+        options: { dayPeriod: "short", hour: "numeric", hourCycle: "h11" },
+        locales: {
+            en: [Hour("0"), Literal(" "), DayPeriod("noon")],
+            de: [Hour("0"), Literal(" "), DayPeriod("mittags")],
+        },
+    },
+    {
+        date: new Date("2019-01-01T12:00:00"),
+        options: { dayPeriod: "short", hour: "numeric", hourCycle: "h23" },
+        locales: {
+            en: [Hour("12")],
+            de: [Hour("12"), Literal(" Uhr")],
+        },
+    },
+    {
+        date: new Date("2019-01-01T12:00:00"),
+        options: { dayPeriod: "short", hour: "numeric", hourCycle: "h24" },
+        locales: {
+            en: [Hour("12")],
+            de: [Hour("12"), Literal(" Uhr")],
+        },
+    },
+
+    // The default hour-cycle is irrelevant when an "hour" option isn't present.
+    {
+        date: new Date("2019-01-01T12:00:00"),
+        options: { dayPeriod: "short", day: "numeric", month: "numeric", year: "numeric" },
+        locales: {
+            en: [Month("1"), Literal("/"), Day("1"), Literal("/"), Year("2019"), Literal(", "), DayPeriod("noon")],
+            de: [Day("1"), Literal("."), Month("1"), Literal("."), Year("2019"), Literal(", "), DayPeriod("mittags")],
+        },
+    },
+
+    // ICU replacement pattern for missing <appendItem> entries in CLDR.
+    {
+        date: new Date("2019-01-01T12:00:00"),
+        options: { dayPeriod: "short", minute: "numeric" },
+        locales: {
+            en: [Minute("0"), Literal(" (AM/PM: "), DayPeriod("noon"), Literal(")")],
+            de: [Minute("0"), Literal(" (Tageshälfte: "), DayPeriod("mittags"), Literal(")")],
+        },
+    },
+];
+
+for (let {date, options, locales} of tests) {
+    for (let [locale, parts] of Object.entries(locales)) {
+        let dtf = new Intl.DateTimeFormat(locale, options);
+
+        assertEq(dtf.format(date), parts.map(({value}) => value).join(""),
+                 `locale=${locale}, date=${date}, options=${JSON.stringify(options)}`);
+
+        assertDeepEq(dtf.formatToParts(date), parts,
+                     `locale=${locale}, date=${date}, options=${JSON.stringify(options)}`);
+    }
+}
+
+if (typeof reportCompare === "function")
+    reportCompare(0, 0, "ok");