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Diffstat (limited to 'base/utf8_test.cpp')
| -rwxr-xr-x | base/utf8_test.cpp | 402 |
1 files changed, 402 insertions, 0 deletions
diff --git a/base/utf8_test.cpp b/base/utf8_test.cpp new file mode 100755 index 000000000..bbb54b1b1 --- /dev/null +++ b/base/utf8_test.cpp @@ -0,0 +1,402 @@ +/* +* Copyright (C) 2015 The Android Open Source Project +* +* Licensed under the Apache License, Version 2.0 (the "License"); +* you may not use this file except in compliance with the License. +* You may obtain a copy of the License at +* +* http://www.apache.org/licenses/LICENSE-2.0 +* +* Unless required by applicable law or agreed to in writing, software +* distributed under the License is distributed on an "AS IS" BASIS, +* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +* See the License for the specific language governing permissions and +* limitations under the License. +*/ + +#include "base/utf8.h" + +#include <gtest/gtest.h> + +#include "base/macros.h" + +namespace android { +namespace base { + +TEST(UTFStringConversionsTest, ConvertInvalidUTF8) { + std::wstring wide; + + // Standalone \xa2 is an invalid UTF-8 sequence, so this should return an + // error. Concatenate two C/C++ literal string constants to prevent the + // compiler from giving an error about "\xa2af" containing a "hex escape + // sequence out of range". + EXPECT_FALSE(android::base::UTF8ToWide("before\xa2" "after", &wide)); + + // Even if an invalid character is encountered, UTF8ToWide() should still do + // its best to convert the rest of the string. sysdeps_win32.cpp: + // _console_write_utf8() depends on this behavior. + // + // Thus, we verify that the valid characters are converted, but we ignore the + // specific replacement character that UTF8ToWide() may replace the invalid + // UTF-8 characters with because we want to allow that to change if the + // implementation changes. + EXPECT_EQ(0, wide.find(L"before")); + const wchar_t after_wide[] = L"after"; + EXPECT_EQ(wide.length() - (arraysize(after_wide) - 1), wide.find(after_wide)); +} + +// Below is adapted from https://chromium.googlesource.com/chromium/src/+/master/base/strings/utf_string_conversions_unittest.cc + +// Copyright (c) 2010 The Chromium Authors. All rights reserved. +// Use of this source code is governed by a BSD-style license that can be +// found in the LICENSE file. + +// The tests below from utf_string_conversions_unittest.cc check for this +// preprocessor symbol, so define it, as it is appropriate for Windows. +#define WCHAR_T_IS_UTF16 +static_assert(sizeof(wchar_t) == 2, "wchar_t is not 2 bytes"); + +// The tests below from utf_string_conversions_unittest.cc call versions of +// UTF8ToWide() and WideToUTF8() that don't return success/failure, so these are +// stub implementations with that signature. These are just for testing and +// should not be moved to base because they assert/expect no errors which is +// probably not a good idea (or at least it is something that should be left +// up to the caller, not a base library). + +static std::wstring UTF8ToWide(const std::string& utf8) { + std::wstring utf16; + EXPECT_TRUE(UTF8ToWide(utf8, &utf16)); + return utf16; +} + +static std::string WideToUTF8(const std::wstring& utf16) { + std::string utf8; + EXPECT_TRUE(WideToUTF8(utf16, &utf8)); + return utf8; +} + +namespace { + +const wchar_t* const kConvertRoundtripCases[] = { + L"Google Video", + // "网页 图片 资讯更多 »" + L"\x7f51\x9875\x0020\x56fe\x7247\x0020\x8d44\x8baf\x66f4\x591a\x0020\x00bb", + // "Παγκόσμιος Ιστός" + L"\x03a0\x03b1\x03b3\x03ba\x03cc\x03c3\x03bc\x03b9" + L"\x03bf\x03c2\x0020\x0399\x03c3\x03c4\x03cc\x03c2", + // "Поиск страниц на русском" + L"\x041f\x043e\x0438\x0441\x043a\x0020\x0441\x0442" + L"\x0440\x0430\x043d\x0438\x0446\x0020\x043d\x0430" + L"\x0020\x0440\x0443\x0441\x0441\x043a\x043e\x043c", + // "전체서비스" + L"\xc804\xccb4\xc11c\xbe44\xc2a4", + + // Test characters that take more than 16 bits. This will depend on whether + // wchar_t is 16 or 32 bits. +#if defined(WCHAR_T_IS_UTF16) + L"\xd800\xdf00", + // ????? (Mathematical Alphanumeric Symbols (U+011d40 - U+011d44 : A,B,C,D,E) + L"\xd807\xdd40\xd807\xdd41\xd807\xdd42\xd807\xdd43\xd807\xdd44", +#elif defined(WCHAR_T_IS_UTF32) + L"\x10300", + // ????? (Mathematical Alphanumeric Symbols (U+011d40 - U+011d44 : A,B,C,D,E) + L"\x11d40\x11d41\x11d42\x11d43\x11d44", +#endif +}; + +} // namespace + +TEST(UTFStringConversionsTest, ConvertUTF8AndWide) { + // we round-trip all the wide strings through UTF-8 to make sure everything + // agrees on the conversion. This uses the stream operators to test them + // simultaneously. + for (size_t i = 0; i < arraysize(kConvertRoundtripCases); ++i) { + std::ostringstream utf8; + utf8 << WideToUTF8(kConvertRoundtripCases[i]); + std::wostringstream wide; + wide << UTF8ToWide(utf8.str()); + + EXPECT_EQ(kConvertRoundtripCases[i], wide.str()); + } +} + +TEST(UTFStringConversionsTest, ConvertUTF8AndWideEmptyString) { + // An empty std::wstring should be converted to an empty std::string, + // and vice versa. + std::wstring wempty; + std::string empty; + EXPECT_EQ(empty, WideToUTF8(wempty)); + EXPECT_EQ(wempty, UTF8ToWide(empty)); +} + +TEST(UTFStringConversionsTest, ConvertUTF8ToWide) { + struct UTF8ToWideCase { + const char* utf8; + const wchar_t* wide; + bool success; + } convert_cases[] = { + // Regular UTF-8 input. + {"\xe4\xbd\xa0\xe5\xa5\xbd", L"\x4f60\x597d", true}, + // Non-character is passed through. + {"\xef\xbf\xbfHello", L"\xffffHello", true}, + // Truncated UTF-8 sequence. + {"\xe4\xa0\xe5\xa5\xbd", L"\xfffd\x597d", false}, + // Truncated off the end. + {"\xe5\xa5\xbd\xe4\xa0", L"\x597d\xfffd", false}, + // Non-shortest-form UTF-8. + {"\xf0\x84\xbd\xa0\xe5\xa5\xbd", L"\xfffd\x597d", false}, + // This UTF-8 character decodes to a UTF-16 surrogate, which is illegal. + // Note that for whatever reason, this test fails on Windows XP. + {"\xed\xb0\x80", L"\xfffd", false}, + // Non-BMP characters. The second is a non-character regarded as valid. + // The result will either be in UTF-16 or UTF-32. +#if defined(WCHAR_T_IS_UTF16) + {"A\xF0\x90\x8C\x80z", L"A\xd800\xdf00z", true}, + {"A\xF4\x8F\xBF\xBEz", L"A\xdbff\xdffez", true}, +#elif defined(WCHAR_T_IS_UTF32) + {"A\xF0\x90\x8C\x80z", L"A\x10300z", true}, + {"A\xF4\x8F\xBF\xBEz", L"A\x10fffez", true}, +#endif + }; + + for (size_t i = 0; i < arraysize(convert_cases); i++) { + std::wstring converted; + const bool success = UTF8ToWide(convert_cases[i].utf8, + strlen(convert_cases[i].utf8), + &converted); + EXPECT_EQ(convert_cases[i].success, success); + // The original test always compared expected and converted, but don't do + // that because our implementation of UTF8ToWide() does not guarantee to + // produce the same output in error situations. + if (success) { + std::wstring expected(convert_cases[i].wide); + EXPECT_EQ(expected, converted); + } + } + + // Manually test an embedded NULL. + std::wstring converted; + EXPECT_TRUE(UTF8ToWide("\00Z\t", 3, &converted)); + ASSERT_EQ(3U, converted.length()); + EXPECT_EQ(static_cast<wchar_t>(0), converted[0]); + EXPECT_EQ('Z', converted[1]); + EXPECT_EQ('\t', converted[2]); + + // Make sure that conversion replaces, not appends. + EXPECT_TRUE(UTF8ToWide("B", 1, &converted)); + ASSERT_EQ(1U, converted.length()); + EXPECT_EQ('B', converted[0]); +} + +#if defined(WCHAR_T_IS_UTF16) +// This test is only valid when wchar_t == UTF-16. +TEST(UTFStringConversionsTest, ConvertUTF16ToUTF8) { + struct WideToUTF8Case { + const wchar_t* utf16; + const char* utf8; + bool success; + } convert_cases[] = { + // Regular UTF-16 input. + {L"\x4f60\x597d", "\xe4\xbd\xa0\xe5\xa5\xbd", true}, + // Test a non-BMP character. + {L"\xd800\xdf00", "\xF0\x90\x8C\x80", true}, + // Non-characters are passed through. + {L"\xffffHello", "\xEF\xBF\xBFHello", true}, + {L"\xdbff\xdffeHello", "\xF4\x8F\xBF\xBEHello", true}, + // The first character is a truncated UTF-16 character. + // Note that for whatever reason, this test fails on Windows XP. + {L"\xd800\x597d", "\xef\xbf\xbd\xe5\xa5\xbd", +#if (WINVER >= 0x0600) + // Only Vista and later has a new API/flag that correctly returns false. + false +#else + true +#endif + }, + // Truncated at the end. + // Note that for whatever reason, this test fails on Windows XP. + {L"\x597d\xd800", "\xe5\xa5\xbd\xef\xbf\xbd", +#if (WINVER >= 0x0600) + // Only Vista and later has a new API/flag that correctly returns false. + false +#else + true +#endif + }, + }; + + for (size_t i = 0; i < arraysize(convert_cases); i++) { + std::string converted; + const bool success = WideToUTF8(convert_cases[i].utf16, + wcslen(convert_cases[i].utf16), + &converted); + EXPECT_EQ(convert_cases[i].success, success); + // The original test always compared expected and converted, but don't do + // that because our implementation of WideToUTF8() does not guarantee to + // produce the same output in error situations. + if (success) { + std::string expected(convert_cases[i].utf8); + EXPECT_EQ(expected, converted); + } + } +} + +#elif defined(WCHAR_T_IS_UTF32) +// This test is only valid when wchar_t == UTF-32. +TEST(UTFStringConversionsTest, ConvertUTF32ToUTF8) { + struct WideToUTF8Case { + const wchar_t* utf32; + const char* utf8; + bool success; + } convert_cases[] = { + // Regular 16-bit input. + {L"\x4f60\x597d", "\xe4\xbd\xa0\xe5\xa5\xbd", true}, + // Test a non-BMP character. + {L"A\x10300z", "A\xF0\x90\x8C\x80z", true}, + // Non-characters are passed through. + {L"\xffffHello", "\xEF\xBF\xBFHello", true}, + {L"\x10fffeHello", "\xF4\x8F\xBF\xBEHello", true}, + // Invalid Unicode code points. + {L"\xfffffffHello", "\xEF\xBF\xBDHello", false}, + // The first character is a truncated UTF-16 character. + {L"\xd800\x597d", "\xef\xbf\xbd\xe5\xa5\xbd", false}, + {L"\xdc01Hello", "\xef\xbf\xbdHello", false}, + }; + + for (size_t i = 0; i < arraysize(convert_cases); i++) { + std::string converted; + EXPECT_EQ(convert_cases[i].success, + WideToUTF8(convert_cases[i].utf32, + wcslen(convert_cases[i].utf32), + &converted)); + std::string expected(convert_cases[i].utf8); + EXPECT_EQ(expected, converted); + } +} +#endif // defined(WCHAR_T_IS_UTF32) + +// The test below uses these types and functions, so just do enough to get the +// test running. +typedef wchar_t char16; +typedef std::wstring string16; + +template<typename T> +static void* WriteInto(T* t, size_t size) { + // std::(w)string::resize() already includes space for a NULL terminator. + t->resize(size - 1); + return &(*t)[0]; +} + +// A stub implementation that calls a helper from above, just to get the test +// below working. This is just for testing and should not be moved to base +// because this ignores errors which is probably not a good idea, plus it takes +// a string16 type which we don't really have. +static std::string UTF16ToUTF8(const string16& utf16) { + return WideToUTF8(utf16); +} + +TEST(UTFStringConversionsTest, ConvertMultiString) { + static char16 multi16[] = { + 'f', 'o', 'o', '\0', + 'b', 'a', 'r', '\0', + 'b', 'a', 'z', '\0', + '\0' + }; + static char multi[] = { + 'f', 'o', 'o', '\0', + 'b', 'a', 'r', '\0', + 'b', 'a', 'z', '\0', + '\0' + }; + string16 multistring16; + memcpy(WriteInto(&multistring16, arraysize(multi16)), multi16, + sizeof(multi16)); + EXPECT_EQ(arraysize(multi16) - 1, multistring16.length()); + std::string expected; + memcpy(WriteInto(&expected, arraysize(multi)), multi, sizeof(multi)); + EXPECT_EQ(arraysize(multi) - 1, expected.length()); + const std::string& converted = UTF16ToUTF8(multistring16); + EXPECT_EQ(arraysize(multi) - 1, converted.length()); + EXPECT_EQ(expected, converted); +} + +// The tests below from sys_string_conversions_unittest.cc call SysWideToUTF8() +// and SysUTF8ToWide(), so these are stub implementations that call the helpers +// above. These are just for testing and should not be moved to base because +// they ignore errors which is probably not a good idea. + +static std::string SysWideToUTF8(const std::wstring& utf16) { + return WideToUTF8(utf16); +} + +static std::wstring SysUTF8ToWide(const std::string& utf8) { + return UTF8ToWide(utf8); +} + +// Below is adapted from https://chromium.googlesource.com/chromium/src/+/master/base/strings/sys_string_conversions_unittest.cc + +// Copyright (c) 2011 The Chromium Authors. All rights reserved. +// Use of this source code is governed by a BSD-style license that can be +// found in the LICENSE file. + +#ifdef WCHAR_T_IS_UTF32 +static const std::wstring kSysWideOldItalicLetterA = L"\x10300"; +#else +static const std::wstring kSysWideOldItalicLetterA = L"\xd800\xdf00"; +#endif + +TEST(SysStrings, SysWideToUTF8) { + EXPECT_EQ("Hello, world", SysWideToUTF8(L"Hello, world")); + EXPECT_EQ("\xe4\xbd\xa0\xe5\xa5\xbd", SysWideToUTF8(L"\x4f60\x597d")); + + // >16 bits + EXPECT_EQ("\xF0\x90\x8C\x80", SysWideToUTF8(kSysWideOldItalicLetterA)); + + // Error case. When Windows finds a UTF-16 character going off the end of + // a string, it just converts that literal value to UTF-8, even though this + // is invalid. + // + // This is what XP does, but Vista has different behavior, so we don't bother + // verifying it: + // EXPECT_EQ("\xE4\xBD\xA0\xED\xA0\x80zyxw", + // SysWideToUTF8(L"\x4f60\xd800zyxw")); + + // Test embedded NULLs. + std::wstring wide_null(L"a"); + wide_null.push_back(0); + wide_null.push_back('b'); + + std::string expected_null("a"); + expected_null.push_back(0); + expected_null.push_back('b'); + + EXPECT_EQ(expected_null, SysWideToUTF8(wide_null)); +} + +TEST(SysStrings, SysUTF8ToWide) { + EXPECT_EQ(L"Hello, world", SysUTF8ToWide("Hello, world")); + EXPECT_EQ(L"\x4f60\x597d", SysUTF8ToWide("\xe4\xbd\xa0\xe5\xa5\xbd")); + // >16 bits + EXPECT_EQ(kSysWideOldItalicLetterA, SysUTF8ToWide("\xF0\x90\x8C\x80")); + + // Error case. When Windows finds an invalid UTF-8 character, it just skips + // it. This seems weird because it's inconsistent with the reverse conversion. + // + // This is what XP does, but Vista has different behavior, so we don't bother + // verifying it: + // EXPECT_EQ(L"\x4f60zyxw", SysUTF8ToWide("\xe4\xbd\xa0\xe5\xa5zyxw")); + + // Test embedded NULLs. + std::string utf8_null("a"); + utf8_null.push_back(0); + utf8_null.push_back('b'); + + std::wstring expected_null(L"a"); + expected_null.push_back(0); + expected_null.push_back('b'); + + EXPECT_EQ(expected_null, SysUTF8ToWide(utf8_null)); +} + +} // namespace base +} // namespace android |