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 "base/basictypes.h" 6 #include "base/string_util.h" 7 #include "testing/gtest/include/gtest/gtest.h" 8 9 namespace base { 10 11 namespace { 12 13 // Given a null-terminated string of wchar_t with each wchar_t representing 14 // a UTF-16 code unit, returns a string16 made up of wchar_t's in the input. 15 // Each wchar_t should be <= 0xFFFF and a non-BMP character (> U+FFFF) 16 // should be represented as a surrogate pair (two UTF-16 units) 17 // *even* where wchar_t is 32-bit (Linux and Mac). 18 // 19 // This is to help write tests for functions with string16 params until 20 // the C++ 0x UTF-16 literal is well-supported by compilers. 21 string16 BuildString16(const wchar_t* s) { 22 #if defined(WCHAR_T_IS_UTF16) 23 return string16(s); 24 #elif defined(WCHAR_T_IS_UTF32) 25 string16 u16; 26 while (*s != 0) { 27 DCHECK(static_cast<unsigned int>(*s) <= 0xFFFFu); 28 u16.push_back(*s++); 29 } 30 return u16; 31 #endif 32 } 33 34 const wchar_t* const kConvertRoundtripCases[] = { 35 L"Google Video", 36 // " " 37 L"\x7f51\x9875\x0020\x56fe\x7247\x0020\x8d44\x8baf\x66f4\x591a\x0020\x00bb", 38 // " " 39 L"\x03a0\x03b1\x03b3\x03ba\x03cc\x03c3\x03bc\x03b9" 40 L"\x03bf\x03c2\x0020\x0399\x03c3\x03c4\x03cc\x03c2", 41 // " " 42 L"\x041f\x043e\x0438\x0441\x043a\x0020\x0441\x0442" 43 L"\x0440\x0430\x043d\x0438\x0446\x0020\x043d\x0430" 44 L"\x0020\x0440\x0443\x0441\x0441\x043a\x043e\x043c", 45 // "" 46 L"\xc804\xccb4\xc11c\xbe44\xc2a4", 47 48 // Test characters that take more than 16 bits. This will depend on whether 49 // wchar_t is 16 or 32 bits. 50 #if defined(WCHAR_T_IS_UTF16) 51 L"\xd800\xdf00", 52 // ????? (Mathematical Alphanumeric Symbols (U+011d40 - U+011d44 : A,B,C,D,E) 53 L"\xd807\xdd40\xd807\xdd41\xd807\xdd42\xd807\xdd43\xd807\xdd44", 54 #elif defined(WCHAR_T_IS_UTF32) 55 L"\x10300", 56 // ????? (Mathematical Alphanumeric Symbols (U+011d40 - U+011d44 : A,B,C,D,E) 57 L"\x11d40\x11d41\x11d42\x11d43\x11d44", 58 #endif 59 }; 60 61 } // namespace 62 63 TEST(UTFStringConversionsTest, ConvertUTF8AndWide) { 64 // we round-trip all the wide strings through UTF-8 to make sure everything 65 // agrees on the conversion. This uses the stream operators to test them 66 // simultaneously. 67 for (size_t i = 0; i < arraysize(kConvertRoundtripCases); ++i) { 68 std::ostringstream utf8; 69 utf8 << WideToUTF8(kConvertRoundtripCases[i]); 70 std::wostringstream wide; 71 wide << UTF8ToWide(utf8.str()); 72 73 EXPECT_EQ(kConvertRoundtripCases[i], wide.str()); 74 } 75 } 76 77 TEST(UTFStringConversionsTest, ConvertUTF8AndWideEmptyString) { 78 // An empty std::wstring should be converted to an empty std::string, 79 // and vice versa. 80 std::wstring wempty; 81 std::string empty; 82 EXPECT_EQ(empty, WideToUTF8(wempty)); 83 EXPECT_EQ(wempty, UTF8ToWide(empty)); 84 } 85 86 TEST(UTFStringConversionsTest, ConvertUTF8ToWide) { 87 struct UTF8ToWideCase { 88 const char* utf8; 89 const wchar_t* wide; 90 bool success; 91 } convert_cases[] = { 92 // Regular UTF-8 input. 93 {"\xe4\xbd\xa0\xe5\xa5\xbd", L"\x4f60\x597d", true}, 94 // Non-character is passed through. 95 {"\xef\xbf\xbfHello", L"\xffffHello", true}, 96 // Truncated UTF-8 sequence. 97 {"\xe4\xa0\xe5\xa5\xbd", L"\xfffd\x597d", false}, 98 // Truncated off the end. 99 {"\xe5\xa5\xbd\xe4\xa0", L"\x597d\xfffd", false}, 100 // Non-shortest-form UTF-8. 101 {"\xf0\x84\xbd\xa0\xe5\xa5\xbd", L"\xfffd\x597d", false}, 102 // This UTF-8 character decodes to a UTF-16 surrogate, which is illegal. 103 {"\xed\xb0\x80", L"\xfffd", false}, 104 // Non-BMP characters. The second is a non-character regarded as valid. 105 // The result will either be in UTF-16 or UTF-32. 106 #if defined(WCHAR_T_IS_UTF16) 107 {"A\xF0\x90\x8C\x80z", L"A\xd800\xdf00z", true}, 108 {"A\xF4\x8F\xBF\xBEz", L"A\xdbff\xdffez", true}, 109 #elif defined(WCHAR_T_IS_UTF32) 110 {"A\xF0\x90\x8C\x80z", L"A\x10300z", true}, 111 {"A\xF4\x8F\xBF\xBEz", L"A\x10fffez", true}, 112 #endif 113 }; 114 115 for (size_t i = 0; i < ARRAYSIZE_UNSAFE(convert_cases); i++) { 116 std::wstring converted; 117 EXPECT_EQ(convert_cases[i].success, 118 UTF8ToWide(convert_cases[i].utf8, 119 strlen(convert_cases[i].utf8), 120 &converted)); 121 std::wstring expected(convert_cases[i].wide); 122 EXPECT_EQ(expected, converted); 123 } 124 125 // Manually test an embedded NULL. 126 std::wstring converted; 127 EXPECT_TRUE(UTF8ToWide("\00Z\t", 3, &converted)); 128 ASSERT_EQ(3U, converted.length()); 129 EXPECT_EQ(static_cast<wchar_t>(0), converted[0]); 130 EXPECT_EQ('Z', converted[1]); 131 EXPECT_EQ('\t', converted[2]); 132 133 // Make sure that conversion replaces, not appends. 134 EXPECT_TRUE(UTF8ToWide("B", 1, &converted)); 135 ASSERT_EQ(1U, converted.length()); 136 EXPECT_EQ('B', converted[0]); 137 } 138 139 #if defined(WCHAR_T_IS_UTF16) 140 // This test is only valid when wchar_t == UTF-16. 141 TEST(UTFStringConversionsTest, ConvertUTF16ToUTF8) { 142 struct WideToUTF8Case { 143 const wchar_t* utf16; 144 const char* utf8; 145 bool success; 146 } convert_cases[] = { 147 // Regular UTF-16 input. 148 {L"\x4f60\x597d", "\xe4\xbd\xa0\xe5\xa5\xbd", true}, 149 // Test a non-BMP character. 150 {L"\xd800\xdf00", "\xF0\x90\x8C\x80", true}, 151 // Non-characters are passed through. 152 {L"\xffffHello", "\xEF\xBF\xBFHello", true}, 153 {L"\xdbff\xdffeHello", "\xF4\x8F\xBF\xBEHello", true}, 154 // The first character is a truncated UTF-16 character. 155 {L"\xd800\x597d", "\xef\xbf\xbd\xe5\xa5\xbd", false}, 156 // Truncated at the end. 157 {L"\x597d\xd800", "\xe5\xa5\xbd\xef\xbf\xbd", false}, 158 }; 159 160 for (int i = 0; i < arraysize(convert_cases); i++) { 161 std::string converted; 162 EXPECT_EQ(convert_cases[i].success, 163 WideToUTF8(convert_cases[i].utf16, 164 wcslen(convert_cases[i].utf16), 165 &converted)); 166 std::string expected(convert_cases[i].utf8); 167 EXPECT_EQ(expected, converted); 168 } 169 } 170 171 #elif defined(WCHAR_T_IS_UTF32) 172 // This test is only valid when wchar_t == UTF-32. 173 TEST(UTFStringConversionsTest, ConvertUTF32ToUTF8) { 174 struct WideToUTF8Case { 175 const wchar_t* utf32; 176 const char* utf8; 177 bool success; 178 } convert_cases[] = { 179 // Regular 16-bit input. 180 {L"\x4f60\x597d", "\xe4\xbd\xa0\xe5\xa5\xbd", true}, 181 // Test a non-BMP character. 182 {L"A\x10300z", "A\xF0\x90\x8C\x80z", true}, 183 // Non-characters are passed through. 184 {L"\xffffHello", "\xEF\xBF\xBFHello", true}, 185 {L"\x10fffeHello", "\xF4\x8F\xBF\xBEHello", true}, 186 // Invalid Unicode code points. 187 {L"\xfffffffHello", "\xEF\xBF\xBDHello", false}, 188 // The first character is a truncated UTF-16 character. 189 {L"\xd800\x597d", "\xef\xbf\xbd\xe5\xa5\xbd", false}, 190 {L"\xdc01Hello", "\xef\xbf\xbdHello", false}, 191 }; 192 193 for (size_t i = 0; i < ARRAYSIZE_UNSAFE(convert_cases); i++) { 194 std::string converted; 195 EXPECT_EQ(convert_cases[i].success, 196 WideToUTF8(convert_cases[i].utf32, 197 wcslen(convert_cases[i].utf32), 198 &converted)); 199 std::string expected(convert_cases[i].utf8); 200 EXPECT_EQ(expected, converted); 201 } 202 } 203 #endif // defined(WCHAR_T_IS_UTF32) 204 205 TEST(UTFStringConversionsTest, ConvertMultiString) { 206 static wchar_t wmulti[] = { 207 L'f', L'o', L'o', L'\0', 208 L'b', L'a', L'r', L'\0', 209 L'b', L'a', L'z', L'\0', 210 L'\0' 211 }; 212 static char multi[] = { 213 'f', 'o', 'o', '\0', 214 'b', 'a', 'r', '\0', 215 'b', 'a', 'z', '\0', 216 '\0' 217 }; 218 std::wstring wmultistring; 219 memcpy(WriteInto(&wmultistring, arraysize(wmulti)), wmulti, sizeof(wmulti)); 220 EXPECT_EQ(arraysize(wmulti) - 1, wmultistring.length()); 221 std::string expected; 222 memcpy(WriteInto(&expected, arraysize(multi)), multi, sizeof(multi)); 223 EXPECT_EQ(arraysize(multi) - 1, expected.length()); 224 const std::string& converted = WideToUTF8(wmultistring); 225 EXPECT_EQ(arraysize(multi) - 1, converted.length()); 226 EXPECT_EQ(expected, converted); 227 } 228 229 } // namaspace base 230
