text: // Copyright 2014 The Chromium Authors. All rights reserved.
  // Use of this source code is governed by a BSD-style license that can be
  // found in the LICENSE file.
  
  #include "extensions/common/extension_l10n_util.h"
  
  #include "base/files/file_path.h"
  #include "base/files/file_util.h"
  #include "base/files/scoped_temp_dir.h"
  #include "base/memory/linked_ptr.h"
  #include "base/memory/scoped_ptr.h"
  #include "base/path_service.h"
  #include "base/strings/utf_string_conversions.h"
  #include "base/values.h"
  #include "extensions/common/constants.h"
  #include "extensions/common/error_utils.h"
  #include "extensions/common/extension_paths.h"
  #include "extensions/common/manifest_constants.h"
  #include "extensions/common/message_bundle.h"
  #include "testing/gmock/include/gmock/gmock.h"
  #include "testing/gtest/include/gtest/gtest.h"
  #include "ui/base/l10n/l10n_util.h"
  
  namespace extensions {
  
  namespace errors = manifest_errors;
  namespace keys = manifest_keys;
  
  namespace {
  
  TEST(ExtensionL10nUtil, ValidateLocalesWithBadLocale) {
    base::ScopedTempDir temp;
    ASSERT_TRUE(temp.CreateUniqueTempDir());
  
    base::FilePath src_path = temp.path().Append(kLocaleFolder);
    base::FilePath locale = src_path.AppendASCII("ms");
    ASSERT_TRUE(base::CreateDirectory(locale));
  
    base::FilePath messages_file = locale.Append(kMessagesFilename);
    std::string data = "{ \"name\":";
    ASSERT_TRUE(base::WriteFile(messages_file, data.c_str(), data.length()));
  
    base::DictionaryValue manifest;
    manifest.SetString(keys::kDefaultLocale, "en");
    std::string error;
    EXPECT_FALSE(extension_l10n_util::ValidateExtensionLocales(
        temp.path(), &manifest, &error));
    EXPECT_THAT(
        error,
        testing::HasSubstr(base::UTF16ToUTF8(messages_file.LossyDisplayName())));
  }
  
  TEST(ExtensionL10nUtil, GetValidLocalesEmptyLocaleFolder) {
    base::ScopedTempDir temp;
    ASSERT_TRUE(temp.CreateUniqueTempDir());
  
    base::FilePath src_path = temp.path().Append(kLocaleFolder);
    ASSERT_TRUE(base::CreateDirectory(src_path));
  
    std::string error;
    std::set<std::string> locales;
    EXPECT_FALSE(
        extension_l10n_util::GetValidLocales(src_path, &locales, &error));
  
    EXPECT_TRUE(locales.empty());
  }
  
  TEST(ExtensionL10nUtil, GetValidLocalesWithValidLocaleNoMessagesFile) {
    base::ScopedTempDir temp;
    ASSERT_TRUE(temp.CreateUniqueTempDir());
  
    base::FilePath src_path = temp.path().Append(kLocaleFolder);
    ASSERT_TRUE(base::CreateDirectory(src_path));
    ASSERT_TRUE(base::CreateDirectory(src_path.AppendASCII("sr")));
  
    std::string error;
    std::set<std::string> locales;
    EXPECT_FALSE(
        extension_l10n_util::GetValidLocales(src_path, &locales, &error));
  
    EXPECT_TRUE(locales.empty());
  }
  
  TEST(ExtensionL10nUtil, GetValidLocalesWithUnsupportedLocale) {
    base::ScopedTempDir temp;
    ASSERT_TRUE(temp.CreateUniqueTempDir());
  
    base::FilePath src_path = temp.path().Append(kLocaleFolder);
    ASSERT_TRUE(base::CreateDirectory(src_path));
    // Supported locale.
    base::FilePath locale_1 = src_path.AppendASCII("sr");
    ASSERT_TRUE(base::CreateDirectory(locale_1));
    std::string data("whatever");
    ASSERT_TRUE(base::WriteFile(
        locale_1.Append(kMessagesFilename), data.c_str(), data.length()));
    // Unsupported locale.
    ASSERT_TRUE(base::CreateDirectory(src_path.AppendASCII("xxx_yyy")));
  
    std::string error;
    std::set<std::string> locales;
    EXPECT_TRUE(extension_l10n_util::GetValidLocales(src_path, &locales, &error));
  
    EXPECT_FALSE(locales.empty());
    EXPECT_TRUE(locales.find("sr") != locales.end());
    EXPECT_FALSE(locales.find("xxx_yyy") != locales.end());
  }
  
  TEST(ExtensionL10nUtil, GetValidLocalesWithValidLocalesAndMessagesFile) {
    base::FilePath install_dir;
    ASSERT_TRUE(PathService::Get(DIR_TEST_DATA, &install_dir));
    install_dir =
        install_dir.AppendASCII("extension_with_locales").Append(kLocaleFolder);
  
    std::string error;
    std::set<std::string> locales;
    EXPECT_TRUE(
        extension_l10n_util::GetValidLocales(install_dir, &locales, &error));
    EXPECT_EQ(3U, locales.size());
    EXPECT_TRUE(locales.find("sr") != locales.end());
    EXPECT_TRUE(locales.find("en") != locales.end());
    EXPECT_TRUE(locales.find("en_US") != locales.end());
  }
  
  TEST(ExtensionL10nUtil, LoadMessageCatalogsValidFallback) {
    base::FilePath install_dir;
    ASSERT_TRUE(PathService::Get(DIR_TEST_DATA, &install_dir));
    install_dir =
        install_dir.AppendASCII("extension_with_locales").Append(kLocaleFolder);
  
    std::string error;
    scoped_ptr<MessageBundle> bundle(extension_l10n_util::LoadMessageCatalogs(
        install_dir, "sr", "en_US", &error));
    ASSERT_FALSE(NULL == bundle.get());
    EXPECT_TRUE(error.empty());
    EXPECT_EQ("Color", bundle->GetL10nMessage("color"));
    EXPECT_EQ("Not in the US or GB.", bundle->GetL10nMessage("not_in_US_or_GB"));
  }
  
  TEST(ExtensionL10nUtil, LoadMessageCatalogsMissingFiles) {
    base::ScopedTempDir temp;
    ASSERT_TRUE(temp.CreateUniqueTempDir());
  
    base::FilePath src_path = temp.path().Append(kLocaleFolder);
    ASSERT_TRUE(base::CreateDirectory(src_path));
    ASSERT_TRUE(base::CreateDirectory(src_path.AppendASCII("en")));
    ASSERT_TRUE(base::CreateDirectory(src_path.AppendASCII("sr")));
  
    std::string error;
    EXPECT_TRUE(NULL == extension_l10n_util::LoadMessageCatalogs(src_path, "en",
                                                                 "sr", &error));
    EXPECT_FALSE(error.empty());
  }
  
  TEST(ExtensionL10nUtil, LoadMessageCatalogsBadJSONFormat) {
    base::ScopedTempDir temp;
    ASSERT_TRUE(temp.CreateUniqueTempDir());
  
    base::FilePath src_path = temp.path().Append(kLocaleFolder);
    ASSERT_TRUE(base::CreateDirectory(src_path));
  
    base::FilePath locale = src_path.AppendASCII("sr");
    ASSERT_TRUE(base::CreateDirectory(locale));
  
    std::string data = "{ \"name\":";
    base::FilePath messages_file = locale.Append(kMessagesFilename);
    ASSERT_TRUE(base::WriteFile(messages_file, data.c_str(), data.length()));
  
    std::string error;
    EXPECT_TRUE(NULL == extension_l10n_util::LoadMessageCatalogs(
                            src_path, "en_US", "sr", &error));
    EXPECT_EQ(ErrorUtils::FormatErrorMessage(
                  errors::kLocalesInvalidLocale,
                  base::UTF16ToUTF8(messages_file.LossyDisplayName()),
                  "Line: 1, column: 10, Unexpected token."),
              error);
  }
  
  TEST(ExtensionL10nUtil, LoadMessageCatalogsDuplicateKeys) {
    base::ScopedTempDir temp;
    ASSERT_TRUE(temp.CreateUniqueTempDir());
  
    base::FilePath src_path = temp.path().Append(kLocaleFolder);
    ASSERT_TRUE(base::CreateDirectory(src_path));
  
    base::FilePath locale_1 = src_path.AppendASCII("en");
    ASSERT_TRUE(base::CreateDirectory(locale_1));
  
    std::string data =
        "{ \"name\": { \"message\": \"something\" }, "
        "\"name\": { \"message\": \"something else\" } }";
    ASSERT_TRUE(base::WriteFile(
        locale_1.Append(kMessagesFilename), data.c_str(), data.length()));
  
    base::FilePath locale_2 = src_path.AppendASCII("sr");
    ASSERT_TRUE(base::CreateDirectory(locale_2));
  
    ASSERT_TRUE(base::WriteFile(
        locale_2.Append(kMessagesFilename), data.c_str(), data.length()));
  
    std::string error;
    // JSON parser hides duplicates. We are going to get only one key/value
    // pair at the end.
    scoped_ptr<MessageBundle> message_bundle(
        extension_l10n_util::LoadMessageCatalogs(src_path, "en", "sr", &error));
    EXPECT_TRUE(NULL != message_bundle.get());
    EXPECT_TRUE(error.empty());
  }
  
  // Caller owns the returned object.
  MessageBundle* CreateManifestBundle() {
    linked_ptr<base::DictionaryValue> catalog(new base::DictionaryValue);
  
    base::DictionaryValue* name_tree = new base::DictionaryValue();
    name_tree->SetString("message", "name");
    catalog->Set("name", name_tree);
  
    base::DictionaryValue* short_name_tree = new base::DictionaryValue();
    short_name_tree->SetString("message", "short_name");
    catalog->Set("short_name", short_name_tree);
  
    base::DictionaryValue* description_tree = new base::DictionaryValue();
    description_tree->SetString("message", "description");
    catalog->Set("description", description_tree);
  
    base::DictionaryValue* action_title_tree = new base::DictionaryValue();
    action_title_tree->SetString("message", "action title");
    catalog->Set("title", action_title_tree);
  
    base::DictionaryValue* omnibox_keyword_tree = new base::DictionaryValue();
    omnibox_keyword_tree->SetString("message", "omnibox keyword");
    catalog->Set("omnibox_keyword", omnibox_keyword_tree);
  
    base::DictionaryValue* file_handler_title_tree = new base::DictionaryValue();
    file_handler_title_tree->SetString("message", "file handler title");
    catalog->Set("file_handler_title", file_handler_title_tree);
  
    base::DictionaryValue* launch_local_path_tree = new base::DictionaryValue();
    launch_local_path_tree->SetString("message", "main.html");
    catalog->Set("launch_local_path", launch_local_path_tree);
  
    base::DictionaryValue* launch_web_url_tree = new base::DictionaryValue();
    launch_web_url_tree->SetString("message", "http://www.google.com/");
    catalog->Set("launch_web_url", launch_web_url_tree);
  
    base::DictionaryValue* first_command_description_tree =
        new base::DictionaryValue();
    first_command_description_tree->SetString("message", "first command");
    catalog->Set("first_command_description", first_command_description_tree);
  
    base::DictionaryValue* second_command_description_tree =
        new base::DictionaryValue();
    second_command_description_tree->SetString("message", "second command");
    catalog->Set("second_command_description", second_command_description_tree);
  
    base::DictionaryValue* url_country_tree = new base::DictionaryValue();
    url_country_tree->SetString("message", "de");
    catalog->Set("country", url_country_tree);
  
    std::vector<linked_ptr<base::DictionaryValue> > catalogs;
    catalogs.push_back(catalog);
  
    std::string error;
    MessageBundle* bundle = MessageBundle::Create(catalogs, &error);
    EXPECT_TRUE(bundle);
    EXPECT_TRUE(error.empty());
  
    return bundle;
  }
  
  TEST(ExtensionL10nUtil, LocalizeEmptyManifest) {
    base::DictionaryValue manifest;
    std::string error;
    scoped_ptr<MessageBundle> messages(CreateManifestBundle());
  
    EXPECT_FALSE(
        extension_l10n_util::LocalizeManifest(*messages, &manifest, &error));
    EXPECT_EQ(std::string(errors::kInvalidName), error);
  }
  
  TEST(ExtensionL10nUtil, LocalizeManifestWithoutNameMsgAndEmptyDescription) {
    base::DictionaryValue manifest;
    manifest.SetString(keys::kName, "no __MSG");
    std::string error;
    scoped_ptr<MessageBundle> messages(CreateManifestBundle());
  
    EXPECT_TRUE(
        extension_l10n_util::LocalizeManifest(*messages, &manifest, &error));
  
    std::string result;
    ASSERT_TRUE(manifest.GetString(keys::kName, &result));
    EXPECT_EQ("no __MSG", result);
  
    EXPECT_FALSE(manifest.HasKey(keys::kDescription));
  
    EXPECT_TRUE(error.empty());
  }
  
  TEST(ExtensionL10nUtil, LocalizeManifestWithNameMsgAndEmptyDescription) {
    base::DictionaryValue manifest;
    manifest.SetString(keys::kName, "__MSG_name__");
    std::string error;
    scoped_ptr<MessageBundle> messages(CreateManifestBundle());
  
    EXPECT_TRUE(
        extension_l10n_util::LocalizeManifest(*messages, &manifest, &error));
  
    std::string result;
    ASSERT_TRUE(manifest.GetString(keys::kName, &result));
    EXPECT_EQ("name", result);
  
    EXPECT_FALSE(manifest.HasKey(keys::kDescription));
  
    EXPECT_TRUE(error.empty());
  }
  
  TEST(ExtensionL10nUtil, LocalizeManifestWithLocalLaunchURL) {
    base::DictionaryValue manifest;
    manifest.SetString(keys::kName, "name");
    manifest.SetString(keys::kLaunchLocalPath, "__MSG_launch_local_path__");
    std::string error;
    scoped_ptr<MessageBundle> messages(CreateManifestBundle());
  
    EXPECT_TRUE(
        extension_l10n_util::LocalizeManifest(*messages, &manifest, &error));
  
    std::string result;
    ASSERT_TRUE(manifest.GetString(keys::kLaunchLocalPath, &result));
    EXPECT_EQ("main.html", result);
  
    EXPECT_TRUE(error.empty());
  }
  
  TEST(ExtensionL10nUtil, LocalizeManifestWithHostedLaunchURL) {
    base::DictionaryValue manifest;
    manifest.SetString(keys::kName, "name");
    manifest.SetString(keys::kLaunchWebURL, "__MSG_launch_web_url__");
    std::string error;
    scoped_ptr<MessageBundle> messages(CreateManifestBundle());
  
    EXPECT_TRUE(
        extension_l10n_util::LocalizeManifest(*messages, &manifest, &error));
  
    std::string result;
    ASSERT_TRUE(manifest.GetString(keys::kLaunchWebURL, &result));
    EXPECT_EQ("http://www.google.com/", result);
  
    EXPECT_TRUE(error.empty());
  }
  
  TEST(ExtensionL10nUtil, LocalizeManifestWithBadNameMsg) {
    base::DictionaryValue manifest;
    manifest.SetString(keys::kName, "__MSG_name_is_bad__");
    manifest.SetString(keys::kDescription, "__MSG_description__");
    std::string error;
    scoped_ptr<MessageBundle> messages(CreateManifestBundle());
  
    EXPECT_FALSE(
        extension_l10n_util::LocalizeManifest(*messages, &manifest, &error));
  
    std::string result;
    ASSERT_TRUE(manifest.GetString(keys::kName, &result));
    EXPECT_EQ("__MSG_name_is_bad__", result);
  
    ASSERT_TRUE(manifest.GetString(keys::kDescription, &result));
    EXPECT_EQ("__MSG_description__", result);
  
    EXPECT_EQ("Variable __MSG_name_is_bad__ used but not defined.", error);
  }
  
  TEST(ExtensionL10nUtil, LocalizeManifestWithNameDescriptionDefaultTitleMsgs) {
    base::DictionaryValue manifest;
    manifest.SetString(keys::kName, "__MSG_name__");
    manifest.SetString(keys::kDescription, "__MSG_description__");
    std::string action_title(keys::kBrowserAction);
    action_title.append(".");
    action_title.append(keys::kPageActionDefaultTitle);
    manifest.SetString(action_title, "__MSG_title__");
  
    std::string error;
    scoped_ptr<MessageBundle> messages(CreateManifestBundle());
  
    EXPECT_TRUE(
        extension_l10n_util::LocalizeManifest(*messages, &manifest, &error));
  
    std::string result;
    ASSERT_TRUE(manifest.GetString(keys::kName, &result));
    EXPECT_EQ("name", result);
  
    ASSERT_TRUE(manifest.GetString(keys::kDescription, &result));
    EXPECT_EQ("description", result);
  
    ASSERT_TRUE(manifest.GetString(action_title, &result));
    EXPECT_EQ("action title", result);
  
    EXPECT_TRUE(error.empty());
  }
  
  TEST(ExtensionL10nUtil, LocalizeManifestWithNameDescriptionOmniboxMsgs) {
    base::DictionaryValue manifest;
    manifest.SetString(keys::kName, "__MSG_name__");
    manifest.SetString(keys::kDescription, "__MSG_description__");
    manifest.SetString(keys::kOmniboxKeyword, "__MSG_omnibox_keyword__");
  
    std::string error;
    scoped_ptr<MessageBundle> messages(CreateManifestBundle());
  
    EXPECT_TRUE(
        extension_l10n_util::LocalizeManifest(*messages, &manifest, &error));
  
    std::string result;
    ASSERT_TRUE(manifest.GetString(keys::kName, &result));
    EXPECT_EQ("name", result);
  
    ASSERT_TRUE(manifest.GetString(keys::kDescription, &result));
    EXPECT_EQ("description", result);
  
    ASSERT_TRUE(manifest.GetString(keys::kOmniboxKeyword, &result));
    EXPECT_EQ("omnibox keyword", result);
  
    EXPECT_TRUE(error.empty());
  }
  
  TEST(ExtensionL10nUtil, LocalizeManifestWithNameDescriptionFileHandlerTitle) {
    base::DictionaryValue manifest;
    manifest.SetString(keys::kName, "__MSG_name__");
    manifest.SetString(keys::kDescription, "__MSG_description__");
    base::ListValue* handlers = new base::ListValue();
    manifest.Set(keys::kFileBrowserHandlers, handlers);
    base::DictionaryValue* handler = new base::DictionaryValue();
    handlers->Append(handler);
    handler->SetString(keys::kPageActionDefaultTitle,
                       "__MSG_file_handler_title__");
  
    std::string error;
    scoped_ptr<MessageBundle> messages(CreateManifestBundle());
  
    EXPECT_TRUE(
        extension_l10n_util::LocalizeManifest(*messages, &manifest, &error));
  
    std::string result;
    ASSERT_TRUE(manifest.GetString(keys::kName, &result));
    EXPECT_EQ("name", result);
  
    ASSERT_TRUE(manifest.GetString(keys::kDescription, &result));
    EXPECT_EQ("description", result);
  
    ASSERT_TRUE(handler->GetString(keys::kPageActionDefaultTitle, &result));
    EXPECT_EQ("file handler title", result);
  
    EXPECT_TRUE(error.empty());
  }
  
  TEST(ExtensionL10nUtil, LocalizeManifestWithNameDescriptionCommandDescription) {
    base::DictionaryValue manifest;
    manifest.SetString(keys::kName, "__MSG_name__");
    manifest.SetString(keys::kDescription, "__MSG_description__");
    base::DictionaryValue* commands = new base::DictionaryValue();
    std::string commands_title(keys::kCommands);
    manifest.Set(commands_title, commands);
  
    base::DictionaryValue* first_command = new base::DictionaryValue();
    commands->Set("first_command", first_command);
    first_command->SetString(keys::kDescription,
                             "__MSG_first_command_description__");
  
    base::DictionaryValue* second_command = new base::DictionaryValue();
    commands->Set("second_command", second_command);
    second_command->SetString(keys::kDescription,
                              "__MSG_second_command_description__");
  
    std::string error;
    scoped_ptr<MessageBundle> messages(CreateManifestBundle());
  
    EXPECT_TRUE(
        extension_l10n_util::LocalizeManifest(*messages, &manifest, &error));
  
    std::string result;
    ASSERT_TRUE(manifest.GetString(keys::kName, &result));
    EXPECT_EQ("name", result);
  
    ASSERT_TRUE(manifest.GetString(keys::kDescription, &result));
    EXPECT_EQ("description", result);
  
    ASSERT_TRUE(
        manifest.GetString("commands.first_command.description", &result));
    EXPECT_EQ("first command", result);
  
    ASSERT_TRUE(
        manifest.GetString("commands.second_command.description", &result));
    EXPECT_EQ("second command", result);
  
    EXPECT_TRUE(error.empty());
  }
  
  TEST(ExtensionL10nUtil, LocalizeManifestWithShortName) {
    base::DictionaryValue manifest;
    manifest.SetString(keys::kName, "extension name");
    manifest.SetString(keys::kShortName, "__MSG_short_name__");
  
    std::string error;
    scoped_ptr<MessageBundle> messages(CreateManifestBundle());
  
    EXPECT_TRUE(
        extension_l10n_util::LocalizeManifest(*messages, &manifest, &error));
    EXPECT_TRUE(error.empty());
  
    std::string result;
    ASSERT_TRUE(manifest.GetString(keys::kShortName, &result));
    EXPECT_EQ("short_name", result);
  }
  
  TEST(ExtensionL10nUtil, LocalizeManifestWithBadShortName) {
    base::DictionaryValue manifest;
    manifest.SetString(keys::kName, "extension name");
    manifest.SetString(keys::kShortName, "__MSG_short_name_bad__");
  
    std::string error;
    scoped_ptr<MessageBundle> messages(CreateManifestBundle());
  
    EXPECT_FALSE(
        extension_l10n_util::LocalizeManifest(*messages, &manifest, &error));
    EXPECT_FALSE(error.empty());
  
    std::string result;
    ASSERT_TRUE(manifest.GetString(keys::kShortName, &result));
    EXPECT_EQ("__MSG_short_name_bad__", result);
  }
  
  TEST(ExtensionL10nUtil, LocalizeManifestWithSearchProviderMsgs) {
    base::DictionaryValue manifest;
    manifest.SetString(keys::kName, "__MSG_name__");
    manifest.SetString(keys::kDescription, "__MSG_description__");
  
    base::DictionaryValue* search_provider = new base::DictionaryValue;
    search_provider->SetString("name", "__MSG_country__");
    search_provider->SetString("keyword", "__MSG_omnibox_keyword__");
    search_provider->SetString("search_url", "http://www.foo.__MSG_country__");
    search_provider->SetString("favicon_url", "http://www.foo.__MSG_country__");
    search_provider->SetString("suggest_url", "http://www.foo.__MSG_country__");
    manifest.Set(keys::kOverrideSearchProvider, search_provider);
  
    manifest.SetString(keys::kOverrideHomepage, "http://www.foo.__MSG_country__");
  
    base::ListValue* startup_pages = new base::ListValue;
    startup_pages->AppendString("http://www.foo.__MSG_country__");
    manifest.Set(keys::kOverrideStartupPage, startup_pages);
  
    std::string error;
    scoped_ptr<MessageBundle> messages(CreateManifestBundle());
  
    EXPECT_TRUE(
        extension_l10n_util::LocalizeManifest(*messages, &manifest, &error));
  
    std::string result;
    ASSERT_TRUE(manifest.GetString(keys::kName, &result));
    EXPECT_EQ("name", result);
  
    ASSERT_TRUE(manifest.GetString(keys::kDescription, &result));
    EXPECT_EQ("description", result);
  
    std::string key_prefix(keys::kOverrideSearchProvider);
    key_prefix += '.';
    ASSERT_TRUE(manifest.GetString(key_prefix + "name", &result));
    EXPECT_EQ("de", result);
  
    ASSERT_TRUE(manifest.GetString(key_prefix + "keyword", &result));
    EXPECT_EQ("omnibox keyword", result);
  
    ASSERT_TRUE(manifest.GetString(key_prefix + "search_url", &result));
    EXPECT_EQ("http://www.foo.de", result);
  
    ASSERT_TRUE(manifest.GetString(key_prefix + "favicon_url", &result));
    EXPECT_EQ("http://www.foo.de", result);
  
    ASSERT_TRUE(manifest.GetString(key_prefix + "suggest_url", &result));
    EXPECT_EQ("http://www.foo.de", result);
  
    ASSERT_TRUE(manifest.GetString(keys::kOverrideHomepage, &result));
    EXPECT_EQ("http://www.foo.de", result);
  
    ASSERT_TRUE(manifest.GetList(keys::kOverrideStartupPage, &startup_pages));
    ASSERT_TRUE(startup_pages->GetString(0, &result));
    EXPECT_EQ("http://www.foo.de", result);
  
    EXPECT_TRUE(error.empty());
  }
  
  // Try with NULL manifest.
  TEST(ExtensionL10nUtil, ShouldRelocalizeManifestWithNullManifest) {
    EXPECT_FALSE(extension_l10n_util::ShouldRelocalizeManifest(NULL));
  }
  
  // Try with default and current locales missing.
  TEST(ExtensionL10nUtil, ShouldRelocalizeManifestEmptyManifest) {
    base::DictionaryValue manifest;
    EXPECT_FALSE(extension_l10n_util::ShouldRelocalizeManifest(&manifest));
  }
  
  // Try with missing current_locale.
  TEST(ExtensionL10nUtil, ShouldRelocalizeManifestWithDefaultLocale) {
    base::DictionaryValue manifest;
    manifest.SetString(keys::kDefaultLocale, "en_US");
    EXPECT_TRUE(extension_l10n_util::ShouldRelocalizeManifest(&manifest));
  }
  
  // Try with missing default_locale.
  TEST(ExtensionL10nUtil, ShouldRelocalizeManifestWithCurrentLocale) {
    base::DictionaryValue manifest;
    manifest.SetString(keys::kCurrentLocale,
                       extension_l10n_util::CurrentLocaleOrDefault());
    EXPECT_FALSE(extension_l10n_util::ShouldRelocalizeManifest(&manifest));
  }
  
  // Try with all data present, but with same current_locale as system locale.
  TEST(ExtensionL10nUtil, ShouldRelocalizeManifestSameCurrentLocale) {
    base::DictionaryValue manifest;
    manifest.SetString(keys::kDefaultLocale, "en_US");
    manifest.SetString(keys::kCurrentLocale,
                       extension_l10n_util::CurrentLocaleOrDefault());
    EXPECT_FALSE(extension_l10n_util::ShouldRelocalizeManifest(&manifest));
  }
  
  // Try with all data present, but with different current_locale.
  TEST(ExtensionL10nUtil, ShouldRelocalizeManifestDifferentCurrentLocale) {
    base::DictionaryValue manifest;
    manifest.SetString(keys::kDefaultLocale, "en_US");
    manifest.SetString(keys::kCurrentLocale, "sr");
    EXPECT_TRUE(extension_l10n_util::ShouldRelocalizeManifest(&manifest));
  }
  
  TEST(ExtensionL10nUtil, GetAllFallbackLocales) {
    std::vector<std::string> fallback_locales;
    extension_l10n_util::GetAllFallbackLocales("en_US", "all", &fallback_locales);
    ASSERT_EQ(3U, fallback_locales.size());
  
    CHECK_EQ("en_US", fallback_locales[0]);
    CHECK_EQ("en", fallback_locales[1]);
    CHECK_EQ("all", fallback_locales[2]);
  }
  
  }  // namespace
  }  // namespace extensions
  