1 files changed, 34 insertions, 0 deletions
diff --git a/js/src/tests/non262/Intl/DateTimeFormat/shell.js b/js/src/tests/non262/Intl/DateTimeFormat/shell.js
new file mode 100644
index 0000000000..c2f9e7138b
--- /dev/null
+++ b/js/src/tests/non262/Intl/DateTimeFormat/shell.js
@@ -0,0 +1,34 @@
+function GenericPartCreator(type) {
+    return str => ({ type, value: str });
+}
+
+const DateTimeFormatParts = {
+    Weekday: GenericPartCreator("weekday"),
+    Era: GenericPartCreator("era"),
+    Year: GenericPartCreator("year"),
+    YearName: GenericPartCreator("yearName"),
+    RelatedYear: GenericPartCreator("relatedYear"),
+    Month: GenericPartCreator("month"),
+    Day: GenericPartCreator("day"),
+    DayPeriod: GenericPartCreator("dayPeriod"),
+    Hour: GenericPartCreator("hour"),
+    Minute: GenericPartCreator("minute"),
+    Second: GenericPartCreator("second"),
+    FractionalSecond: GenericPartCreator("fractionalSecond"),
+    TimeZoneName: GenericPartCreator("timeZoneName"),
+    Unknown: GenericPartCreator("unknown"),
+    Literal: GenericPartCreator("literal"),
+};
+
+function assertParts(df, x, expected) {
+    var parts = df.formatToParts(x);
+    assertEq(parts.map(part => part.value).join(""), df.format(x),
+             "formatToParts and format must agree");
+
+    var len = parts.length;
+    assertEq(len, expected.length, "parts count mismatch");
+    for (var i = 0; i < len; i++) {
+        assertEq(parts[i].type, expected[i].type, "type mismatch at " + i);
+        assertEq(parts[i].value, expected[i].value, "value mismatch at " + i);
+    }
+}