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      1 // Copyright (c) 2010 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 "base/basictypes.h"
      6 #include "base/logging.h"
      7 #include "base/string_piece.h"
      8 #include "base/string_util.h"
      9 #include "base/utf_string_conversions.h"
     10 #include "testing/gtest/include/gtest/gtest.h"
     11 
     12 namespace base {
     13 
     14 namespace {
     15 
     16 const wchar_t* const kConvertRoundtripCases[] = {
     17   L"Google Video",
     18   // "   "
     19   L"\x7f51\x9875\x0020\x56fe\x7247\x0020\x8d44\x8baf\x66f4\x591a\x0020\x00bb",
     20   //  " "
     21   L"\x03a0\x03b1\x03b3\x03ba\x03cc\x03c3\x03bc\x03b9"
     22   L"\x03bf\x03c2\x0020\x0399\x03c3\x03c4\x03cc\x03c2",
     23   // "   "
     24   L"\x041f\x043e\x0438\x0441\x043a\x0020\x0441\x0442"
     25   L"\x0440\x0430\x043d\x0438\x0446\x0020\x043d\x0430"
     26   L"\x0020\x0440\x0443\x0441\x0441\x043a\x043e\x043c",
     27   // ""
     28   L"\xc804\xccb4\xc11c\xbe44\xc2a4",
     29 
     30   // Test characters that take more than 16 bits. This will depend on whether
     31   // wchar_t is 16 or 32 bits.
     32 #if defined(WCHAR_T_IS_UTF16)
     33   L"\xd800\xdf00",
     34   // ?????  (Mathematical Alphanumeric Symbols (U+011d40 - U+011d44 : A,B,C,D,E)
     35   L"\xd807\xdd40\xd807\xdd41\xd807\xdd42\xd807\xdd43\xd807\xdd44",
     36 #elif defined(WCHAR_T_IS_UTF32)
     37   L"\x10300",
     38   // ?????  (Mathematical Alphanumeric Symbols (U+011d40 - U+011d44 : A,B,C,D,E)
     39   L"\x11d40\x11d41\x11d42\x11d43\x11d44",
     40 #endif
     41 };
     42 
     43 }  // namespace
     44 
     45 TEST(UTFStringConversionsTest, ConvertUTF8AndWide) {
     46   // we round-trip all the wide strings through UTF-8 to make sure everything
     47   // agrees on the conversion. This uses the stream operators to test them
     48   // simultaneously.
     49   for (size_t i = 0; i < arraysize(kConvertRoundtripCases); ++i) {
     50     std::ostringstream utf8;
     51     utf8 << WideToUTF8(kConvertRoundtripCases[i]);
     52     std::wostringstream wide;
     53     wide << UTF8ToWide(utf8.str());
     54 
     55     EXPECT_EQ(kConvertRoundtripCases[i], wide.str());
     56   }
     57 }
     58 
     59 TEST(UTFStringConversionsTest, ConvertUTF8AndWideEmptyString) {
     60   // An empty std::wstring should be converted to an empty std::string,
     61   // and vice versa.
     62   std::wstring wempty;
     63   std::string empty;
     64   EXPECT_EQ(empty, WideToUTF8(wempty));
     65   EXPECT_EQ(wempty, UTF8ToWide(empty));
     66 }
     67 
     68 TEST(UTFStringConversionsTest, ConvertUTF8ToWide) {
     69   struct UTF8ToWideCase {
     70     const char* utf8;
     71     const wchar_t* wide;
     72     bool success;
     73   } convert_cases[] = {
     74     // Regular UTF-8 input.
     75     {"\xe4\xbd\xa0\xe5\xa5\xbd", L"\x4f60\x597d", true},
     76     // Non-character is passed through.
     77     {"\xef\xbf\xbfHello", L"\xffffHello", true},
     78     // Truncated UTF-8 sequence.
     79     {"\xe4\xa0\xe5\xa5\xbd", L"\xfffd\x597d", false},
     80     // Truncated off the end.
     81     {"\xe5\xa5\xbd\xe4\xa0", L"\x597d\xfffd", false},
     82     // Non-shortest-form UTF-8.
     83     {"\xf0\x84\xbd\xa0\xe5\xa5\xbd", L"\xfffd\x597d", false},
     84     // This UTF-8 character decodes to a UTF-16 surrogate, which is illegal.
     85     {"\xed\xb0\x80", L"\xfffd", false},
     86     // Non-BMP characters. The second is a non-character regarded as valid.
     87     // The result will either be in UTF-16 or UTF-32.
     88 #if defined(WCHAR_T_IS_UTF16)
     89     {"A\xF0\x90\x8C\x80z", L"A\xd800\xdf00z", true},
     90     {"A\xF4\x8F\xBF\xBEz", L"A\xdbff\xdffez", true},
     91 #elif defined(WCHAR_T_IS_UTF32)
     92     {"A\xF0\x90\x8C\x80z", L"A\x10300z", true},
     93     {"A\xF4\x8F\xBF\xBEz", L"A\x10fffez", true},
     94 #endif
     95   };
     96 
     97   for (size_t i = 0; i < ARRAYSIZE_UNSAFE(convert_cases); i++) {
     98     std::wstring converted;
     99     EXPECT_EQ(convert_cases[i].success,
    100               UTF8ToWide(convert_cases[i].utf8,
    101                          strlen(convert_cases[i].utf8),
    102                          &converted));
    103     std::wstring expected(convert_cases[i].wide);
    104     EXPECT_EQ(expected, converted);
    105   }
    106 
    107   // Manually test an embedded NULL.
    108   std::wstring converted;
    109   EXPECT_TRUE(UTF8ToWide("\00Z\t", 3, &converted));
    110   ASSERT_EQ(3U, converted.length());
    111   EXPECT_EQ(static_cast<wchar_t>(0), converted[0]);
    112   EXPECT_EQ('Z', converted[1]);
    113   EXPECT_EQ('\t', converted[2]);
    114 
    115   // Make sure that conversion replaces, not appends.
    116   EXPECT_TRUE(UTF8ToWide("B", 1, &converted));
    117   ASSERT_EQ(1U, converted.length());
    118   EXPECT_EQ('B', converted[0]);
    119 }
    120 
    121 #if defined(WCHAR_T_IS_UTF16)
    122 // This test is only valid when wchar_t == UTF-16.
    123 TEST(UTFStringConversionsTest, ConvertUTF16ToUTF8) {
    124   struct WideToUTF8Case {
    125     const wchar_t* utf16;
    126     const char* utf8;
    127     bool success;
    128   } convert_cases[] = {
    129     // Regular UTF-16 input.
    130     {L"\x4f60\x597d", "\xe4\xbd\xa0\xe5\xa5\xbd", true},
    131     // Test a non-BMP character.
    132     {L"\xd800\xdf00", "\xF0\x90\x8C\x80", true},
    133     // Non-characters are passed through.
    134     {L"\xffffHello", "\xEF\xBF\xBFHello", true},
    135     {L"\xdbff\xdffeHello", "\xF4\x8F\xBF\xBEHello", true},
    136     // The first character is a truncated UTF-16 character.
    137     {L"\xd800\x597d", "\xef\xbf\xbd\xe5\xa5\xbd", false},
    138     // Truncated at the end.
    139     {L"\x597d\xd800", "\xe5\xa5\xbd\xef\xbf\xbd", false},
    140   };
    141 
    142   for (int i = 0; i < arraysize(convert_cases); i++) {
    143     std::string converted;
    144     EXPECT_EQ(convert_cases[i].success,
    145               WideToUTF8(convert_cases[i].utf16,
    146                          wcslen(convert_cases[i].utf16),
    147                          &converted));
    148     std::string expected(convert_cases[i].utf8);
    149     EXPECT_EQ(expected, converted);
    150   }
    151 }
    152 
    153 #elif defined(WCHAR_T_IS_UTF32)
    154 // This test is only valid when wchar_t == UTF-32.
    155 TEST(UTFStringConversionsTest, ConvertUTF32ToUTF8) {
    156   struct WideToUTF8Case {
    157     const wchar_t* utf32;
    158     const char* utf8;
    159     bool success;
    160   } convert_cases[] = {
    161     // Regular 16-bit input.
    162     {L"\x4f60\x597d", "\xe4\xbd\xa0\xe5\xa5\xbd", true},
    163     // Test a non-BMP character.
    164     {L"A\x10300z", "A\xF0\x90\x8C\x80z", true},
    165     // Non-characters are passed through.
    166     {L"\xffffHello", "\xEF\xBF\xBFHello", true},
    167     {L"\x10fffeHello", "\xF4\x8F\xBF\xBEHello", true},
    168     // Invalid Unicode code points.
    169     {L"\xfffffffHello", "\xEF\xBF\xBDHello", false},
    170     // The first character is a truncated UTF-16 character.
    171     {L"\xd800\x597d", "\xef\xbf\xbd\xe5\xa5\xbd", false},
    172     {L"\xdc01Hello", "\xef\xbf\xbdHello", false},
    173   };
    174 
    175   for (size_t i = 0; i < ARRAYSIZE_UNSAFE(convert_cases); i++) {
    176     std::string converted;
    177     EXPECT_EQ(convert_cases[i].success,
    178               WideToUTF8(convert_cases[i].utf32,
    179                          wcslen(convert_cases[i].utf32),
    180                          &converted));
    181     std::string expected(convert_cases[i].utf8);
    182     EXPECT_EQ(expected, converted);
    183   }
    184 }
    185 #endif  // defined(WCHAR_T_IS_UTF32)
    186 
    187 TEST(UTFStringConversionsTest, ConvertMultiString) {
    188   static wchar_t wmulti[] = {
    189     L'f', L'o', L'o', L'\0',
    190     L'b', L'a', L'r', L'\0',
    191     L'b', L'a', L'z', L'\0',
    192     L'\0'
    193   };
    194   static char multi[] = {
    195     'f', 'o', 'o', '\0',
    196     'b', 'a', 'r', '\0',
    197     'b', 'a', 'z', '\0',
    198     '\0'
    199   };
    200   std::wstring wmultistring;
    201   memcpy(WriteInto(&wmultistring, arraysize(wmulti)), wmulti, sizeof(wmulti));
    202   EXPECT_EQ(arraysize(wmulti) - 1, wmultistring.length());
    203   std::string expected;
    204   memcpy(WriteInto(&expected, arraysize(multi)), multi, sizeof(multi));
    205   EXPECT_EQ(arraysize(multi) - 1, expected.length());
    206   const std::string& converted = WideToUTF8(wmultistring);
    207   EXPECT_EQ(arraysize(multi) - 1, converted.length());
    208   EXPECT_EQ(expected, converted);
    209 }
    210 
    211 }  // base
    212