Update //base to chromium 9659b08ea5a34f889dc4166217f438095ddc10d2

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 {
 
+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"
+    L"\x20\xF7\x25\xA4\x23\x2A\x5E\x60\x40\xA3\x24\x2030\x201A\x7E\x20\x1F0F"
+    L"\x1F0F\x20\x1E00\x1E00";
+
+}  // namespace
+
 // Test upper and lower case string conversion.
 TEST(CaseConversionTest, UpperLower) {
   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);
+  string16 result = ToLower(mixed);
   EXPECT_EQ(expected_lower, result);
 
-  result = base::i18n::ToUpper(mixed);
+  result = ToUpper(mixed);
   EXPECT_EQ(expected_upper, result);
 }
 
 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"));
+  const string16 mixed(WideToUTF16(kNonASCIIMixed));
+  const string16 expected_lower(WideToUTF16(kNonASCIILower));
+  const string16 expected_upper(WideToUTF16(kNonASCIIUpper));
 
-  string16 result = base::i18n::ToLower(mixed);
+  string16 result = ToLower(mixed);
   EXPECT_EQ(expected_lower, result);
 
-  result = base::i18n::ToUpper(mixed);
+  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());
   i18n::SetICUDefaultLocale("en_US");
 
-  string16 result = base::i18n::ToLower(mixed);
+  string16 result = ToLower(mixed);
   EXPECT_EQ(expected_lower, result);
 
-  result = base::i18n::ToUpper(mixed);
+  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 = base::i18n::ToLower(mixed);
+  result = ToLower(mixed);
   EXPECT_EQ(expected_lower_turkish, result);
 
-  result = base::i18n::ToUpper(mixed);
+  result = ToUpper(mixed);
   EXPECT_EQ(expected_upper_turkish, result);
 
-  base::i18n::SetICUDefaultLocale(default_locale.data());
+  SetICUDefaultLocale(default_locale.data());
 }
 
-}  // namespace
+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());
+  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