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[chromium-blink-merge.git] / base / i18n / icu_string_conversions_unittest.cc
blob62e055ea6f9c9f559bed407c6e5c798406ec5373
1 // Copyright (c) 2011 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.
5 #include <math.h>
6 #include <stdarg.h>
8 #include <limits>
9 #include <sstream>
11 #include "base/basictypes.h"
12 #include "base/format_macros.h"
13 #include "base/i18n/icu_string_conversions.h"
14 #include "base/logging.h"
15 #include "base/strings/string_piece.h"
16 #include "base/strings/stringprintf.h"
17 #include "base/strings/utf_string_conversions.h"
18 #include "testing/gtest/include/gtest/gtest.h"
20 namespace base {
22 namespace {
24 // Given a null-terminated string of wchar_t with each wchar_t representing
25 // a UTF-16 code unit, returns a string16 made up of wchar_t's in the input.
26 // Each wchar_t should be <= 0xFFFF and a non-BMP character (> U+FFFF)
27 // should be represented as a surrogate pair (two UTF-16 units)
28 // *even* where wchar_t is 32-bit (Linux and Mac).
30 // This is to help write tests for functions with string16 params until
31 // the C++ 0x UTF-16 literal is well-supported by compilers.
32 string16 BuildString16(const wchar_t* s) {
33 #if defined(WCHAR_T_IS_UTF16)
34 return string16(s);
35 #elif defined(WCHAR_T_IS_UTF32)
36 string16 u16;
37 while (*s != 0) {
38 DCHECK_LE(static_cast<unsigned int>(*s), 0xFFFFu);
39 u16.push_back(*s++);
41 return u16;
42 #endif
45 const wchar_t* const kConvertRoundtripCases[] = {
46 L"Google Video",
47 // "网页 图片 资讯更多 »"
48 L"\x7f51\x9875\x0020\x56fe\x7247\x0020\x8d44\x8baf\x66f4\x591a\x0020\x00bb",
49 // "Παγκόσμιος Ιστός"
50 L"\x03a0\x03b1\x03b3\x03ba\x03cc\x03c3\x03bc\x03b9"
51 L"\x03bf\x03c2\x0020\x0399\x03c3\x03c4\x03cc\x03c2",
52 // "Поиск страниц на русском"
53 L"\x041f\x043e\x0438\x0441\x043a\x0020\x0441\x0442"
54 L"\x0440\x0430\x043d\x0438\x0446\x0020\x043d\x0430"
55 L"\x0020\x0440\x0443\x0441\x0441\x043a\x043e\x043c",
56 // "전체서비스"
57 L"\xc804\xccb4\xc11c\xbe44\xc2a4",
59 // Test characters that take more than 16 bits. This will depend on whether
60 // wchar_t is 16 or 32 bits.
61 #if defined(WCHAR_T_IS_UTF16)
62 L"\xd800\xdf00",
63 // ????? (Mathematical Alphanumeric Symbols (U+011d40 - U+011d44 : A,B,C,D,E)
64 L"\xd807\xdd40\xd807\xdd41\xd807\xdd42\xd807\xdd43\xd807\xdd44",
65 #elif defined(WCHAR_T_IS_UTF32)
66 L"\x10300",
67 // ????? (Mathematical Alphanumeric Symbols (U+011d40 - U+011d44 : A,B,C,D,E)
68 L"\x11d40\x11d41\x11d42\x11d43\x11d44",
69 #endif
72 } // namespace
74 TEST(ICUStringConversionsTest, ConvertCodepageUTF8) {
75 // Make sure WideToCodepage works like WideToUTF8.
76 for (size_t i = 0; i < arraysize(kConvertRoundtripCases); ++i) {
77 SCOPED_TRACE(base::StringPrintf("Test[%" PRIuS "]: %ls",
78 i, kConvertRoundtripCases[i]));
80 std::string expected(WideToUTF8(kConvertRoundtripCases[i]));
81 std::string utf8;
82 EXPECT_TRUE(WideToCodepage(kConvertRoundtripCases[i], kCodepageUTF8,
83 OnStringConversionError::SKIP, &utf8));
84 EXPECT_EQ(expected, utf8);
88 // kConverterCodepageCases is not comprehensive. There are a number of cases
89 // to add if we really want to have a comprehensive coverage of various
90 // codepages and their 'idiosyncrasies'. Currently, the only implementation
91 // for CodepageTo* and *ToCodepage uses ICU, which has a very extensive
92 // set of tests for the charset conversion. So, we can get away with a
93 // relatively small number of cases listed below.
95 // Note about |u16_wide| in the following struct.
96 // On Windows, the field is always identical to |wide|. On Mac and Linux,
97 // it's identical as long as there's no character outside the
98 // BMP (<= U+FFFF). When there is, it is different from |wide| and
99 // is not a real wide string (UTF-32 string) in that each wchar_t in
100 // the string is a UTF-16 code unit zero-extended to be 32-bit
101 // even when the code unit belongs to a surrogate pair.
102 // For instance, a Unicode string (U+0041 U+010000) is represented as
103 // L"\x0041\xD800\xDC00" instead of L"\x0041\x10000".
104 // To avoid the clutter, |u16_wide| will be set to NULL
105 // if it's identical to |wide| on *all* platforms.
107 static const struct {
108 const char* codepage_name;
109 const char* encoded;
110 OnStringConversionError::Type on_error;
111 bool success;
112 const wchar_t* wide;
113 const wchar_t* u16_wide;
114 } kConvertCodepageCases[] = {
115 // Test a case where the input cannot be decoded, using SKIP, FAIL
116 // and SUBSTITUTE error handling rules. "A7 41" is valid, but "A6" isn't.
117 {"big5",
118 "\xA7\x41\xA6",
119 OnStringConversionError::FAIL,
120 false,
121 L"",
122 NULL},
123 {"big5",
124 "\xA7\x41\xA6",
125 OnStringConversionError::SKIP,
126 true,
127 L"\x4F60",
128 NULL},
129 {"big5",
130 "\xA7\x41\xA6",
131 OnStringConversionError::SUBSTITUTE,
132 true,
133 L"\x4F60\xFFFD",
134 NULL},
135 // Arabic (ISO-8859)
136 {"iso-8859-6",
137 "\xC7\xEE\xE4\xD3\xF1\xEE\xE4\xC7\xE5\xEF" " "
138 "\xD9\xEE\xE4\xEE\xEA\xF2\xE3\xEF\xE5\xF2",
139 OnStringConversionError::FAIL,
140 true,
141 L"\x0627\x064E\x0644\x0633\x0651\x064E\x0644\x0627\x0645\x064F" L" "
142 L"\x0639\x064E\x0644\x064E\x064A\x0652\x0643\x064F\x0645\x0652",
143 NULL},
144 // Chinese Simplified (GB2312)
145 {"gb2312",
146 "\xC4\xE3\xBA\xC3",
147 OnStringConversionError::FAIL,
148 true,
149 L"\x4F60\x597D",
150 NULL},
151 // Chinese (GB18030) : 4 byte sequences mapped to BMP characters
152 {"gb18030",
153 "\x81\x30\x84\x36\xA1\xA7",
154 OnStringConversionError::FAIL,
155 true,
156 L"\x00A5\x00A8",
157 NULL},
158 // Chinese (GB18030) : A 4 byte sequence mapped to plane 2 (U+20000)
159 {"gb18030",
160 "\x95\x32\x82\x36\xD2\xBB",
161 OnStringConversionError::FAIL,
162 true,
163 #if defined(WCHAR_T_IS_UTF16)
164 L"\xD840\xDC00\x4E00",
165 #elif defined(WCHAR_T_IS_UTF32)
166 L"\x20000\x4E00",
167 #endif
168 L"\xD840\xDC00\x4E00"},
169 {"big5",
170 "\xA7\x41\xA6\x6E",
171 OnStringConversionError::FAIL,
172 true,
173 L"\x4F60\x597D",
174 NULL},
175 // Greek (ISO-8859)
176 {"iso-8859-7",
177 "\xE3\xE5\xE9\xDC" " " "\xF3\xEF\xF5",
178 OnStringConversionError::FAIL,
179 true,
180 L"\x03B3\x03B5\x03B9\x03AC" L" " L"\x03C3\x03BF\x03C5",
181 NULL},
182 // Hebrew (Windows)
183 {"windows-1255",
184 "\xF9\xD1\xC8\xEC\xE5\xC9\xED",
185 OnStringConversionError::FAIL,
186 true,
187 L"\x05E9\x05C1\x05B8\x05DC\x05D5\x05B9\x05DD",
188 NULL},
189 // Hindi Devanagari (ISCII)
190 {"iscii-dev",
191 "\xEF\x42" "\xC6\xCC\xD7\xE8\xB3\xDA\xCF",
192 OnStringConversionError::FAIL,
193 true,
194 L"\x0928\x092E\x0938\x094D\x0915\x093E\x0930",
195 NULL},
196 // Korean (EUC)
197 {"euc-kr",
198 "\xBE\xC8\xB3\xE7\xC7\xCF\xBC\xBC\xBF\xE4",
199 OnStringConversionError::FAIL,
200 true,
201 L"\xC548\xB155\xD558\xC138\xC694",
202 NULL},
203 // Japanese (EUC)
204 {"euc-jp",
205 "\xA4\xB3\xA4\xF3\xA4\xCB\xA4\xC1\xA4\xCF\xB0\xEC\x8F\xB0\xA1\x8E\xA6",
206 OnStringConversionError::FAIL,
207 true,
208 L"\x3053\x3093\x306B\x3061\x306F\x4E00\x4E02\xFF66",
209 NULL},
210 // Japanese (ISO-2022)
211 {"iso-2022-jp",
212 "\x1B$B" "\x24\x33\x24\x73\x24\x4B\x24\x41\x24\x4F\x30\x6C" "\x1B(B"
213 "ab" "\x1B(J" "\x5C\x7E#$" "\x1B(B",
214 OnStringConversionError::FAIL,
215 true,
216 L"\x3053\x3093\x306B\x3061\x306F\x4E00" L"ab\x00A5\x203E#$",
217 NULL},
218 // Japanese (Shift-JIS)
219 {"sjis",
220 "\x82\xB1\x82\xF1\x82\xC9\x82\xBF\x82\xCD\x88\xEA\xA6",
221 OnStringConversionError::FAIL,
222 true,
223 L"\x3053\x3093\x306B\x3061\x306F\x4E00\xFF66",
224 NULL},
225 // Russian (KOI8)
226 {"koi8-r",
227 "\xDA\xC4\xD2\xC1\xD7\xD3\xD4\xD7\xD5\xCA\xD4\xC5",
228 OnStringConversionError::FAIL,
229 true,
230 L"\x0437\x0434\x0440\x0430\x0432\x0441\x0442\x0432"
231 L"\x0443\x0439\x0442\x0435",
232 NULL},
233 // Thai (windows-874)
234 {"windows-874",
235 "\xCA\xC7\xD1\xCA\xB4\xD5" "\xA4\xC3\xD1\xBA",
236 OnStringConversionError::FAIL,
237 true,
238 L"\x0E2A\x0E27\x0E31\x0E2A\x0E14\x0E35"
239 L"\x0E04\x0E23\x0e31\x0E1A",
240 NULL},
241 // Empty text
242 {"iscii-dev",
244 OnStringConversionError::FAIL,
245 true,
246 L"",
247 NULL},
250 TEST(ICUStringConversionsTest, ConvertBetweenCodepageAndWide) {
251 for (size_t i = 0; i < ARRAYSIZE_UNSAFE(kConvertCodepageCases); ++i) {
252 SCOPED_TRACE(base::StringPrintf(
253 "Test[%" PRIuS "]: <encoded: %s> <codepage: %s>", i,
254 kConvertCodepageCases[i].encoded,
255 kConvertCodepageCases[i].codepage_name));
257 std::wstring wide;
258 bool success = CodepageToWide(kConvertCodepageCases[i].encoded,
259 kConvertCodepageCases[i].codepage_name,
260 kConvertCodepageCases[i].on_error,
261 &wide);
262 EXPECT_EQ(kConvertCodepageCases[i].success, success);
263 EXPECT_EQ(kConvertCodepageCases[i].wide, wide);
265 // When decoding was successful and nothing was skipped, we also check the
266 // reverse conversion. Not all conversions are round-trippable, but
267 // kConverterCodepageCases does not have any one-way conversion at the
268 // moment.
269 if (success &&
270 kConvertCodepageCases[i].on_error ==
271 OnStringConversionError::FAIL) {
272 std::string encoded;
273 success = WideToCodepage(wide, kConvertCodepageCases[i].codepage_name,
274 kConvertCodepageCases[i].on_error, &encoded);
275 EXPECT_EQ(kConvertCodepageCases[i].success, success);
276 EXPECT_EQ(kConvertCodepageCases[i].encoded, encoded);
280 // The above cases handled codepage->wide errors, but not wide->codepage.
281 // Test that here.
282 std::string encoded("Temp data"); // Make sure the string gets cleared.
284 // First test going to an encoding that can not represent that character.
285 EXPECT_FALSE(WideToCodepage(L"Chinese\xff27", "iso-8859-1",
286 OnStringConversionError::FAIL, &encoded));
287 EXPECT_TRUE(encoded.empty());
288 EXPECT_TRUE(WideToCodepage(L"Chinese\xff27", "iso-8859-1",
289 OnStringConversionError::SKIP, &encoded));
290 EXPECT_STREQ("Chinese", encoded.c_str());
291 // From Unicode, SUBSTITUTE is the same as SKIP for now.
292 EXPECT_TRUE(WideToCodepage(L"Chinese\xff27", "iso-8859-1",
293 OnStringConversionError::SUBSTITUTE,
294 &encoded));
295 EXPECT_STREQ("Chinese", encoded.c_str());
297 #if defined(WCHAR_T_IS_UTF16)
298 // When we're in UTF-16 mode, test an invalid UTF-16 character in the input.
299 EXPECT_FALSE(WideToCodepage(L"a\xd800z", "iso-8859-1",
300 OnStringConversionError::FAIL, &encoded));
301 EXPECT_TRUE(encoded.empty());
302 EXPECT_TRUE(WideToCodepage(L"a\xd800z", "iso-8859-1",
303 OnStringConversionError::SKIP, &encoded));
304 EXPECT_STREQ("az", encoded.c_str());
305 #endif // WCHAR_T_IS_UTF16
307 // Invalid characters should fail.
308 EXPECT_TRUE(WideToCodepage(L"a\xffffz", "iso-8859-1",
309 OnStringConversionError::SKIP, &encoded));
310 EXPECT_STREQ("az", encoded.c_str());
312 // Invalid codepages should fail.
313 EXPECT_FALSE(WideToCodepage(L"Hello, world", "awesome-8571-2",
314 OnStringConversionError::SKIP, &encoded));
317 TEST(ICUStringConversionsTest, ConvertBetweenCodepageAndUTF16) {
318 for (size_t i = 0; i < ARRAYSIZE_UNSAFE(kConvertCodepageCases); ++i) {
319 SCOPED_TRACE(base::StringPrintf(
320 "Test[%" PRIuS "]: <encoded: %s> <codepage: %s>", i,
321 kConvertCodepageCases[i].encoded,
322 kConvertCodepageCases[i].codepage_name));
324 string16 utf16;
325 bool success = CodepageToUTF16(kConvertCodepageCases[i].encoded,
326 kConvertCodepageCases[i].codepage_name,
327 kConvertCodepageCases[i].on_error,
328 &utf16);
329 string16 utf16_expected;
330 if (kConvertCodepageCases[i].u16_wide == NULL)
331 utf16_expected = BuildString16(kConvertCodepageCases[i].wide);
332 else
333 utf16_expected = BuildString16(kConvertCodepageCases[i].u16_wide);
334 EXPECT_EQ(kConvertCodepageCases[i].success, success);
335 EXPECT_EQ(utf16_expected, utf16);
337 // When decoding was successful and nothing was skipped, we also check the
338 // reverse conversion. See also the corresponding comment in
339 // ConvertBetweenCodepageAndWide.
340 if (success &&
341 kConvertCodepageCases[i].on_error == OnStringConversionError::FAIL) {
342 std::string encoded;
343 success = UTF16ToCodepage(utf16, kConvertCodepageCases[i].codepage_name,
344 kConvertCodepageCases[i].on_error, &encoded);
345 EXPECT_EQ(kConvertCodepageCases[i].success, success);
346 EXPECT_EQ(kConvertCodepageCases[i].encoded, encoded);
351 static const struct {
352 const char* encoded;
353 const char* codepage_name;
354 bool expected_success;
355 const char* expected_value;
356 } kConvertAndNormalizeCases[] = {
357 {"foo-\xe4.html", "iso-8859-1", true, "foo-\xc3\xa4.html"},
358 {"foo-\xe4.html", "iso-8859-7", true, "foo-\xce\xb4.html"},
359 {"foo-\xe4.html", "foo-bar", false, ""},
360 {"foo-\xff.html", "ascii", false, ""},
361 {"foo.html", "ascii", true, "foo.html"},
362 {"foo-a\xcc\x88.html", "utf-8", true, "foo-\xc3\xa4.html"},
363 {"\x95\x32\x82\x36\xD2\xBB", "gb18030", true, "\xF0\xA0\x80\x80\xE4\xB8\x80"},
364 {"\xA7\x41\xA6\x6E", "big5", true, "\xE4\xBD\xA0\xE5\xA5\xBD"},
365 // Windows-1258 does have a combining character at xD2 (which is U+0309).
366 // The sequence of (U+00E2, U+0309) is also encoded as U+1EA9.
367 {"foo\xE2\xD2", "windows-1258", true, "foo\xE1\xBA\xA9"},
368 {"", "iso-8859-1", true, ""},
370 TEST(ICUStringConversionsTest, ConvertToUtf8AndNormalize) {
371 std::string result;
372 for (size_t i = 0; i < ARRAYSIZE_UNSAFE(kConvertAndNormalizeCases); ++i) {
373 SCOPED_TRACE(base::StringPrintf(
374 "Test[%" PRIuS "]: <encoded: %s> <codepage: %s>", i,
375 kConvertAndNormalizeCases[i].encoded,
376 kConvertAndNormalizeCases[i].codepage_name));
378 bool success = ConvertToUtf8AndNormalize(
379 kConvertAndNormalizeCases[i].encoded,
380 kConvertAndNormalizeCases[i].codepage_name, &result);
381 EXPECT_EQ(kConvertAndNormalizeCases[i].expected_success, success);
382 EXPECT_EQ(kConvertAndNormalizeCases[i].expected_value, result);
386 } // namespace base