1 files changed, 68 insertions, 0 deletions
diff --git a/js/src/jsapi-tests/testIntlAvailableLocales.cpp b/js/src/jsapi-tests/testIntlAvailableLocales.cpp
new file mode 100644
index 0000000000..b3d16eb758
--- /dev/null
+++ b/js/src/jsapi-tests/testIntlAvailableLocales.cpp
@@ -0,0 +1,68 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*-
+ * vim: set ts=8 sts=2 et sw=2 tw=80:
+ */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "js/LocaleSensitive.h"
+#include "jsapi-tests/tests.h"
+
+BEGIN_TEST(testIntlAvailableLocales) {
+  JSRuntime* rt = JS_GetRuntime(cx);
+
+  // This test should only attempt to run if we have Intl support.
+  JS::Rooted<JS::Value> haveIntl(cx);
+  EVAL("typeof Intl !== 'undefined'", &haveIntl);
+  if (!haveIntl.toBoolean()) {
+    return true;
+  }
+
+  // Assumption: our Intl support always includes "az" (Azerbaijani) support,
+  // and our Intl support *does not* natively support az-Cyrl-AZ.
+  CHECK(JS_SetDefaultLocale(rt, "az-Cyrl-AZ"));
+
+  EXEC(
+      "if (Intl.Collator().resolvedOptions().locale !== "
+      "'az-Cyrl-AZ') \n"
+      "    throw 'unexpected default locale';");
+  EXEC(
+      "var used = Intl.Collator('az-Cyrl').resolvedOptions().locale; \n"
+      "if (used !== 'az-Cyrl') \n"
+      "    throw 'bad locale when using truncated default: ' + used;");
+  EXEC(
+      "if (Intl.Collator('az').resolvedOptions().locale !== 'az') \n"
+      "    throw 'bad locale when using more-truncated default';");
+  EXEC(
+      "if (Intl.Collator('az-Cyrl-US').resolvedOptions().locale !== 'az-Cyrl') "
+      "\n"
+      "    throw 'unexpected default locale';");
+
+  EXEC(
+      "if (Intl.Collator('az-Cyrl-AZ', { localeMatcher: 'lookup' "
+      "}).resolvedOptions().locale !== \n"
+      "    'az-Cyrl-AZ') \n"
+      "{ \n"
+      "    throw 'unexpected default locale with lookup matcher'; \n"
+      "}");
+
+  CHECK(JS_SetDefaultLocale(rt, "en-US-u-co-phonebk"));
+  EXEC(
+      "if (Intl.Collator().resolvedOptions().locale !== 'en-US') \n"
+      "    throw 'unexpected default locale where proposed default included a "
+      "Unicode extension';");
+
+  CHECK(JS_SetDefaultLocale(rt, "this is not a language tag at all, yo"));
+
+  EXEC(
+      "if (Intl.Collator().resolvedOptions().locale !== 'en-GB') \n"
+      "    throw 'unexpected last-ditch locale';");
+  EXEC(
+      "if (Intl.Collator('en-GB').resolvedOptions().locale !== 'en-GB') \n"
+      "    throw 'unexpected used locale when specified, with last-ditch "
+      "locale as default';");
+
+  JS_ResetDefaultLocale(rt);
+  return true;
+}
+END_TEST(testIntlAvailableLocales)