[Linux] Supports the LANGUAGE environment variable....

app/l10n_util_unittest.cc

 // Copyright (c) 2006-2008 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 "build/build_config.h"
 
+#if defined(OS_LINUX)
+#include <cstdlib>
+#endif
+
 #include "app/app_paths.h"
 #include "app/l10n_util.h"
 #if !defined(OS_MACOSX)
 #include "app/test/data/resource.h"
 #endif
 #include "base/basictypes.h"
 #include "base/file_util.h"
 #include "base/path_service.h"
 #include "base/stl_util-inl.h"
 #include "base/string_util.h"
@@ skipping 112 matching lines @@
 #endif
   for (size_t i = 0; i < arraysize(filenames); ++i) {
     FilePath filename = new_locale_dir.AppendASCII(
         filenames[i] + kLocaleFileExtension);
     file_util::WriteFile(filename, "", 0);
   }
 
   // Keep a copy of ICU's default locale before we overwrite it.
   icu::Locale locale = icu::Locale::getDefault();
 
+#if defined(OS_LINUX)
+  // Test the support of LANGUAGE environment variable.
+  SetICUDefaultLocale("en-US");
+  ::setenv("LANGUAGE", "xx:fr_CA", 1);
+  EXPECT_EQ("fr", l10n_util::GetApplicationLocale(L""));
+
+  ::setenv("LANGUAGE", "xx:yy:en_gb.utf-8@quot", 1);
+  EXPECT_EQ("en-GB", l10n_util::GetApplicationLocale(L""));
+
+  ::setenv("LANGUAGE", "xx:zh-hk", 1);
+  EXPECT_EQ("zh-TW", l10n_util::GetApplicationLocale(L""));
+
+  SetICUDefaultLocale("fr-FR");
+  ::setenv("LANGUAGE", "xx:yy", 1);
+  EXPECT_EQ("en-US", l10n_util::GetApplicationLocale(L""));
+
+  ::setenv("LANGUAGE", "/fr:zh_CN", 1);
+  EXPECT_EQ("zh-CN", l10n_util::GetApplicationLocale(L""));
+
+  // Make sure the follow tests won't be affected by LANGUAGE environment
+  // variable.
+  ::unsetenv("LANGUAGE");

[tony, 2009/09/28 17:38:46]

Nit: We should probably cache the environment variable and reset it, but I don't
feel strongly about it.

+#endif
+
   SetICUDefaultLocale("en-US");
   EXPECT_EQ("en-US", l10n_util::GetApplicationLocale(L""));
 
   SetICUDefaultLocale("en-GB");
   EXPECT_EQ("en-GB", l10n_util::GetApplicationLocale(L""));
 
   SetICUDefaultLocale("fr-CA");
   EXPECT_EQ("fr", l10n_util::GetApplicationLocale(L""));
 
   SetICUDefaultLocale("xx");
@@ skipping 323 matching lines @@
   string16 mixed(ASCIIToUTF16("Text with UPPer & lowER casE."));
   const string16 expected_lower(ASCIIToUTF16("text with upper & lower case."));
   const string16 expected_upper(ASCIIToUTF16("TEXT WITH UPPER & LOWER CASE."));
 
   string16 result = l10n_util::ToLower(mixed);
   EXPECT_EQ(result, expected_lower);
 
   result = l10n_util::ToUpper(mixed);
   EXPECT_EQ(result, expected_upper);
 }
-