1 files changed, 68 insertions, 0 deletions
diff --git a/js/src/tests/test262/intl402/Locale/constructor-options-firstDayOfWeek-valid.js b/js/src/tests/test262/intl402/Locale/constructor-options-firstDayOfWeek-valid.js
new file mode 100644
index 0000000000..0c5a84cc3a
--- /dev/null
+++ b/js/src/tests/test262/intl402/Locale/constructor-options-firstDayOfWeek-valid.js
@@ -0,0 +1,68 @@
+// |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( tag [, options] )
+
+    ...
+    x. Let numberingSystem be ? GetOption(options, "firstDayOfWeek", "string", < *"mon"*, *"tue"*, *"wed"*, *"thu"*, *"fri"*, *"sat"*, *"sun"*, *"0"*, *"1"*, *"2"*, *"3"*, *"4"*, *"5"*, *"6"*, *"7"*> , undefined).
+    x. Let firstDay be *undefined*.
+    x. If fw is not *undefined*, then
+       x. Set firstDay to !WeekdayToString(fw).
+       x. Set opt.[[fw]] to firstDay.
+    ...
+    x. Let r be ! ApplyUnicodeExtensionToTag(tag, opt, relevantExtensionKeys).
+    ...
+    x. Let firstDay be *undefined*.
+    x. If r.[[fw]] is not *undefined*, then
+       x. Set firstDay to ! WeekdayToNumber(r.[[fw]]).
+       x. Set locale.[[FirstDayOfWeek]] to firstDay.
+    ...
+
+features: [Intl.Locale,Intl.Locale-info]
+---*/
+
+const validFirstDayOfWeekOptions = [
+  ["mon", "en-u-fw-mon"],
+  ["tue", "en-u-fw-tue"],
+  ["wed", "en-u-fw-wed"],
+  ["thu", "en-u-fw-thu"],
+  ["fri", "en-u-fw-fri"],
+  ["sat", "en-u-fw-sat"],
+  ["sun", "en-u-fw-sun"],
+  ["1", "en-u-fw-mon"],
+  ["2", "en-u-fw-tue"],
+  ["3", "en-u-fw-wed"],
+  ["4", "en-u-fw-thu"],
+  ["5", "en-u-fw-fri"],
+  ["6", "en-u-fw-sat"],
+  ["7", "en-u-fw-sun"],
+  ["0", "en-u-fw-sun"],
+  [1, "en-u-fw-mon"],
+  [2, "en-u-fw-tue"],
+  [3, "en-u-fw-wed"],
+  [4, "en-u-fw-thu"],
+  [5, "en-u-fw-fri"],
+  [6, "en-u-fw-sat"],
+  [7, "en-u-fw-sun"],
+  [0, "en-u-fw-sun"],
+];
+for (const [firstDayOfWeek, expected] of validFirstDayOfWeekOptions) {
+  assert.sameValue(
+    new Intl.Locale('en', { firstDayOfWeek }).toString(),
+    expected,
+    `new Intl.Locale("en", { firstDayOfWeek: ${firstDayOfWeek} }).toString() returns "${expected}"`
+  );
+  assert.sameValue(
+    new Intl.Locale('en-u-fw-WED', { firstDayOfWeek }).toString(),
+    expected,
+    `new Intl.Locale("en-u-fw-WED", { firstDayOfWeek: ${firstDayOfWeek} }).toString() returns "${expected}"`
+  );
+}
+
+reportCompare(0, 0);