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      1 // Copyright (c) 2009 The Chromium Authors. All rights reserved.
      2 // Use of this source code is governed by a BSD-style license that can be
      3 // found in the LICENSE file.
      4 
      5 #include <sstream>
      6 
      7 #include "base/string16.h"
      8 #include "base/utf_string_conversions.h"
      9 #include "testing/gtest/include/gtest/gtest.h"
     10 
     11 #if defined(WCHAR_T_IS_UTF32)
     12 
     13 // We define a custom operator<< for string16 so we can use it with logging.
     14 // This tests that conversion.
     15 TEST(String16Test, OutputStream) {
     16   // Basic stream test.
     17   {
     18     std::ostringstream stream;
     19     stream << "Empty '" << string16() << "' standard '"
     20            << string16(ASCIIToUTF16("Hello, world")) << "'";
     21     EXPECT_STREQ("Empty '' standard 'Hello, world'",
     22                  stream.str().c_str());
     23   }
     24 
     25   // Interesting edge cases.
     26   {
     27     // These should each get converted to the invalid character: EF BF BD.
     28     string16 initial_surrogate;
     29     initial_surrogate.push_back(0xd800);
     30     string16 final_surrogate;
     31     final_surrogate.push_back(0xdc00);
     32 
     33     // Old italic A = U+10300, will get converted to: F0 90 8C 80 'z'.
     34     string16 surrogate_pair;
     35     surrogate_pair.push_back(0xd800);
     36     surrogate_pair.push_back(0xdf00);
     37     surrogate_pair.push_back('z');
     38 
     39     // Will get converted to the invalid char + 's': EF BF BD 's'.
     40     string16 unterminated_surrogate;
     41     unterminated_surrogate.push_back(0xd800);
     42     unterminated_surrogate.push_back('s');
     43 
     44     std::ostringstream stream;
     45     stream << initial_surrogate << "," << final_surrogate << ","
     46            << surrogate_pair << "," << unterminated_surrogate;
     47 
     48     EXPECT_STREQ("\xef\xbf\xbd,\xef\xbf\xbd,\xf0\x90\x8c\x80z,\xef\xbf\xbds",
     49                  stream.str().c_str());
     50   }
     51 }
     52 
     53 #endif
     54