added test to test case converting with nonASCII

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"
 
 namespace base {
 namespace {
 
 // Test upper and lower case string conversion.
 TEST(CaseConversionTest, UpperLower) {
-  string16 mixed(ASCIIToUTF16("Text with UPPer & lowER casE."));
+  const 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 = base::i18n::ToLower(mixed);
   EXPECT_EQ(expected_lower, result);
 
   result = base::i18n::ToUpper(mixed);
   EXPECT_EQ(expected_upper, result);
 }
 
-// TODO(jshin): More tests are needed, especially with non-ASCII characters.
+TEST(CaseConversionTest, NonASCII) {
+  const string16 mixed(WideToUTF16(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 string16 expected_lower(WideToUTF16(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 string16 expected_upper(WideToUTF16(L"\xC4\xD6\xC4\xD6\x20\xCF\xCF"
+    L"\x20\xF7\x25\xA4\x23\x2A\x5E\x60\x40\xA3\x24\x2030\x201A\x7E\x20\x1F0F"
+    L"\x1F0F\x20\x1E00\x1E00"));
+
+  string16 result = base::i18n::ToLower(mixed);
+  EXPECT_EQ(expected_lower, result);
+
+  result = base::i18n::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"));
+
+  string16 result = base::i18n::ToLower(mixed);
+  EXPECT_EQ(expected_lower, result);
+
+  result = base::i18n::ToUpper(mixed);
+  EXPECT_EQ(expected_upper, result);
+
+  i18n::SetICUDefaultLocale("tr");

[jungshik at Google, 2015/05/12 20:30:37]

You'd better save the original ICU locale and restore it after you're done. 

+
+  const string16 expected_lower_turkish(WideToUTF16(L"\x131\x131"));
+  const string16 expected_upper_turkish(WideToUTF16(L"\x49\x49"));
+
+  result = base::i18n::ToLower(mixed);
+  EXPECT_EQ(expected_lower_turkish, result);
+
+  result = base::i18n::ToUpper(mixed);
+  EXPECT_EQ(expected_upper_turkish, result);
+}
 
 }  // namespace
 }  // namespace base
+
+
+