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
12namespace base {
13
14namespace {
15
16const wchar_t* const kConvertRoundtripCases[] = {
17  L"Google Video",
18  // "网页 图片 资讯更多 »"
19  L"\x7f51\x9875\x0020\x56fe\x7247\x0020\x8d44\x8baf\x66f4\x591a\x0020\x00bb",
20  //  "Παγκόσμιος Ιστός"
21  L"\x03a0\x03b1\x03b3\x03ba\x03cc\x03c3\x03bc\x03b9"
22  L"\x03bf\x03c2\x0020\x0399\x03c3\x03c4\x03cc\x03c2",
23  // "Поиск страниц на русском"
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  // "전체서비스"
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
45TEST(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
59TEST(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
68TEST(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.
123TEST(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.
155TEST(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
187TEST(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