added test to test case converting with nonASCII

Tested case conversion with some nonascii utf
chars. Also some which should not be changed.
Test also Turkish dotless I with different locales.

Review URL: https://codereview.chromium.org/1104483002

Cr-Commit-Position: refs/heads/master@{#330486}

base/i18n/case_conversion_unittest.cc

@@ -3,15 +3,17 @@
 // 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 {
 
 // 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."));
 
@@ -22,7 +24,57 @@ TEST(CaseConversionTest, UpperLower) {
   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"));
+
+  std::string default_locale(uloc_getDefault());
+  i18n::SetICUDefaultLocale("en_US");
+
+  string16 result = base::i18n::ToLower(mixed);
+  EXPECT_EQ(expected_lower, result);
+
+  result = base::i18n::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 = base::i18n::ToLower(mixed);
+  EXPECT_EQ(expected_lower_turkish, result);
+
+  result = base::i18n::ToUpper(mixed);
+  EXPECT_EQ(expected_upper_turkish, result);
+
+  base::i18n::SetICUDefaultLocale(default_locale.data());
+}
 
 }  // namespace
 }  // namespace base
+
+
+