1 files changed, 142 insertions, 0 deletions
diff --git a/toolkit/components/mozintl/test/test_mozintl_getLocaleDisplayNames.js b/toolkit/components/mozintl/test/test_mozintl_getLocaleDisplayNames.js
new file mode 100644
index 0000000000..e275a46e61
--- /dev/null
+++ b/toolkit/components/mozintl/test/test_mozintl_getLocaleDisplayNames.js
@@ -0,0 +1,142 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+const fs = [
+  {
+    path: "resource://mock_source/toolkit/intl/languageNames.ftl",
+    source: `
+language-name-en = English
+  `,
+  },
+  {
+    path: "resource://mock_source/toolkit/intl/regionNames.ftl",
+    source: `
+region-name-us = United States
+region-name-ru = Russia
+  `,
+  },
+];
+
+let locales = Services.locale.packagedLocales;
+const mockSource = L10nFileSource.createMock(
+  "mock",
+  "app",
+  locales,
+  "resource://mock_source",
+  fs
+);
+L10nRegistry.getInstance().registerSources([mockSource]);
+
+const gLangDN = Services.intl.getLanguageDisplayNames.bind(
+  Services.intl,
+  undefined
+);
+const gAvLocDN = Services.intl.getAvailableLocaleDisplayNames.bind(
+  Services.intl
+);
+const gRegDN = Services.intl.getRegionDisplayNames.bind(
+  Services.intl,
+  undefined
+);
+const gLocDN = Services.intl.getLocaleDisplayNames.bind(
+  Services.intl,
+  undefined
+);
+
+add_test(function test_native_tag() {
+  const options = { preferNative: true };
+  deepEqual(gLocDN([], options), []);
+  deepEqual(gLocDN(["ca-valencia"], options), ["Català (Valencià)"]);
+  deepEqual(gLocDN(["en-US"], options), ["English (US)"]);
+  deepEqual(gLocDN(["en-RU"], options), ["English (Russia)"]);
+  deepEqual(gLocDN(["ja-JP-mac"], options), ["日本語"]);
+  run_next_test();
+});
+
+add_test(function test_valid_language_tag() {
+  deepEqual(gLocDN([]), []);
+  deepEqual(gLocDN(["en"]), ["English"]);
+  deepEqual(gLocDN(["und"]), ["und"]);
+  run_next_test();
+});
+
+add_test(function test_valid_region_tag() {
+  deepEqual(gLocDN(["en-US"]), ["English (United States)"]);
+  deepEqual(gLocDN(["en-XY"]), ["English (XY)"]);
+  run_next_test();
+});
+
+add_test(function test_valid_script_tag() {
+  deepEqual(gLocDN(["en-Cyrl"]), ["English (Cyrl)"]);
+  deepEqual(gLocDN(["en-Cyrl-RU"]), ["English (Cyrl, Russia)"]);
+  run_next_test();
+});
+
+add_test(function test_valid_variants_tag() {
+  deepEqual(gLocDN(["en-Cyrl-macos"]), ["English (Cyrl, macos)"]);
+  deepEqual(gLocDN(["en-Cyrl-RU-macos"]), ["English (Cyrl, Russia, macos)"]);
+  deepEqual(gLocDN(["en-Cyrl-RU-macos-modern"]), [
+    "English (Cyrl, Russia, macos, modern)",
+  ]);
+  run_next_test();
+});
+
+add_test(function test_other_subtags_ignored() {
+  deepEqual(gLocDN(["en-x-ignore"]), ["English"]);
+  deepEqual(gLocDN(["en-t-en-latn"]), ["English"]);
+  deepEqual(gLocDN(["en-u-hc-h24"]), ["English"]);
+  run_next_test();
+});
+
+add_test(function test_invalid_locales() {
+  deepEqual(gLocDN(["2"]), ["2"]);
+  deepEqual(gLocDN([""]), [""]);
+  Assert.throws(() => gLocDN([2]), /All locale codes must be strings/);
+  Assert.throws(() => gLocDN([{}]), /All locale codes must be strings/);
+  Assert.throws(() => gLocDN([true]), /All locale codes must be strings/);
+  run_next_test();
+});
+
+add_test(function test_language_only() {
+  deepEqual(gLangDN([]), []);
+  deepEqual(gLangDN(["en"]), ["English"]);
+  deepEqual(gLangDN(["und"]), ["und"]);
+  run_next_test();
+});
+
+add_test(function test_invalid_languages() {
+  deepEqual(gLangDN(["2"]), ["2"]);
+  deepEqual(gLangDN([""]), [""]);
+  Assert.throws(() => gLangDN([2]), /All language codes must be strings/);
+  Assert.throws(() => gLangDN([{}]), /All language codes must be strings/);
+  Assert.throws(() => gLangDN([true]), /All language codes must be strings/);
+  run_next_test();
+});
+
+add_test(function test_region_only() {
+  deepEqual(gRegDN([]), []);
+  deepEqual(gRegDN(["US"]), ["United States"]);
+  deepEqual(gRegDN(["und"]), ["UND"]);
+  run_next_test();
+});
+
+add_test(function test_invalid_regions() {
+  deepEqual(gRegDN(["2"]), ["2"]);
+  deepEqual(gRegDN([""]), [""]);
+  Assert.throws(() => gRegDN([2]), /All region codes must be strings/);
+  Assert.throws(() => gRegDN([{}]), /All region codes must be strings/);
+  Assert.throws(() => gRegDN([true]), /All region codes must be strings/);
+  run_next_test();
+});
+
+add_test(function test_availableLocaleDisplayNames() {
+  let langCodes = gAvLocDN("language");
+  equal(
+    !!langCodes.length,
+    true,
+    "There should be some language codes available"
+  );
+  let regCodes = gAvLocDN("region");
+  equal(!!regCodes.length, true, "There should be some region codes available");
+  run_next_test();
+});