Restore locales after tests

base/i18n/case_conversion_unittest.cc

 // Copyright (c) 2011 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 "base/i18n/case_conversion.h"
 #include "base/i18n/rtl.h"
 #include "base/strings/utf_string_conversions.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "third_party/icu/source/i18n/unicode/usearch.h"
 
 namespace base {
 namespace i18n {
 
 namespace {
 
+class ScopedSetICUDefaultLocale {
+  std::string default_locale;
+
+ public:
+  ScopedSetICUDefaultLocale(std::string locale);
+  ~ScopedSetICUDefaultLocale();
+};
+
+ScopedSetICUDefaultLocale::ScopedSetICUDefaultLocale(std::string locale)
+    : default_locale(locale) {}
+
+ScopedSetICUDefaultLocale::~ScopedSetICUDefaultLocale() {
+  i18n::SetICUDefaultLocale(default_locale.data());
+}
+
 const wchar_t kNonASCIIMixed[] =
     L"\xC4\xD6\xE4\xF6\x20\xCF\xEF\x20\xF7\x25"
     L"\xA4\x23\x2A\x5E\x60\x40\xA3\x24\x2030\x201A\x7E\x20\x1F07\x1F0F"
     L"\x20\x1E00\x1E01";
 const wchar_t kNonASCIILower[] =
     L"\xE4\xF6\xE4\xF6\x20\xEF\xEF"
     L"\x20\xF7\x25\xA4\x23\x2A\x5E\x60\x40\xA3\x24\x2030\x201A\x7E\x20\x1F07"
     L"\x1F07\x20\x1E01\x1E01";
 const wchar_t kNonASCIIUpper[] =
     L"\xC4\xD6\xC4\xD6\x20\xCF\xCF"
@@ skipping 25 matching lines @@
 
   result = ToUpper(mixed);
   EXPECT_EQ(expected_upper, result);
 }
 
 TEST(CaseConversionTest, TurkishLocaleConversion) {
   const string16 mixed(WideToUTF16(L"\x49\x131"));
   const string16 expected_lower(WideToUTF16(L"\x69\x131"));
   const string16 expected_upper(WideToUTF16(L"\x49\x49"));
 
-  std::string default_locale(uloc_getDefault());
+  ScopedSetICUDefaultLocale restore_object(uloc_getDefault());
   i18n::SetICUDefaultLocale("en_US");
 
   string16 result = ToLower(mixed);
   EXPECT_EQ(expected_lower, result);
 
   result = ToUpper(mixed);
   EXPECT_EQ(expected_upper, result);
 
   i18n::SetICUDefaultLocale("tr");
 
   const string16 expected_lower_turkish(WideToUTF16(L"\x131\x131"));
   const string16 expected_upper_turkish(WideToUTF16(L"\x49\x49"));
 
   result = ToLower(mixed);
   EXPECT_EQ(expected_lower_turkish, result);
 
   result = ToUpper(mixed);
   EXPECT_EQ(expected_upper_turkish, result);
-
-  SetICUDefaultLocale(default_locale.data());
 }
 
 TEST(CaseConversionTest, FoldCase) {
   // Simple ASCII, should lower-case.
   EXPECT_EQ(ASCIIToUTF16("hello, world"),
             FoldCase(ASCIIToUTF16("Hello, World")));
 
   // Non-ASCII cases from above. They should all fold to the same result.
   EXPECT_EQ(FoldCase(WideToUTF16(kNonASCIIMixed)),
             FoldCase(WideToUTF16(kNonASCIILower)));
   EXPECT_EQ(FoldCase(WideToUTF16(kNonASCIIMixed)),
             FoldCase(WideToUTF16(kNonASCIIUpper)));
 
   // Turkish cases from above. This is the lower-case expected result from the
   // US locale. It should be the same even when the current locale is Turkish.
   const string16 turkish(WideToUTF16(L"\x49\x131"));
   const string16 turkish_expected(WideToUTF16(L"\x69\x131"));
 
-  std::string default_locale(uloc_getDefault());
+  ScopedSetICUDefaultLocale restore_object(uloc_getDefault());
   i18n::SetICUDefaultLocale("en_US");
   EXPECT_EQ(turkish_expected, FoldCase(turkish));
 
   i18n::SetICUDefaultLocale("tr");
   EXPECT_EQ(turkish_expected, FoldCase(turkish));
 
   // Test a case that gets bigger when processed.
   // U+130 = LATIN CAPITAL LETTER I WITH DOT ABOVE gets folded to a lower case
   // "i" followed by U+307 COMBINING DOT ABOVE.
   EXPECT_EQ(WideToUTF16(L"i\u0307j"), FoldCase(WideToUTF16(L"\u0130j")));
 
   // U+00DF (SHARP S) and U+1E9E (CAPIRAL SHARP S) are both folded to "ss".
   EXPECT_EQ(ASCIIToUTF16("ssss"), FoldCase(WideToUTF16(L"\u00DF\u1E9E")));
 }
 
 }  // namespace i18n
 }  // namespace base