1 files changed, 33 insertions, 0 deletions
diff --git a/js/src/tests/test262/intl402/Locale/prototype/firstDayOfWeek/valid-id.js b/js/src/tests/test262/intl402/Locale/prototype/firstDayOfWeek/valid-id.js
new file mode 100644
index 0000000000..2f723a409a
--- /dev/null
+++ b/js/src/tests/test262/intl402/Locale/prototype/firstDayOfWeek/valid-id.js
@@ -0,0 +1,33 @@
+// |reftest| skip -- Intl.Locale-info is not supported
+// Copyright 2023 Google Inc.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-intl.locale
+description: >
+    Checks valid cases for the options argument to the Locale constructor.
+info: |
+    Intl.Locale.prototype.firstDayOfWeek
+    3. Return loc.[[FirstDayOfWeek]].
+
+features: [Intl.Locale,Intl.Locale-info]
+---*/
+
+const validIds = [
+  ["en-u-fw-mon", 1],
+  ["en-u-fw-tue", 2],
+  ["en-u-fw-wed", 3],
+  ["en-u-fw-thu", 4],
+  ["en-u-fw-fri", 5],
+  ["en-u-fw-sat", 6],
+  ["en-u-fw-sun", 7],
+];
+for (const [id, expected] of validIds) {
+  assert.sameValue(
+    new Intl.Locale(id).firstDayOfWeek,
+    expected,
+    `new Intl.Locale(${id}).firstDayOfWeek returns "${expected}"`
+  );
+}
+
+reportCompare(0, 0);