| // Copyright (c) 2009 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. |
| |
| #include "base/logging.h" |
| #include "base/string_piece.h" |
| #include "base/utf_offset_string_conversions.h" |
| #include "testing/gtest/include/gtest/gtest.h" |
| |
| namespace base { |
| |
| namespace { |
| |
| // Given a null-terminated string of wchar_t with each wchar_t representing |
| // a UTF-16 code unit, returns a string16 made up of wchar_t's in the input. |
| // Each wchar_t should be <= 0xFFFF and a non-BMP character (> U+FFFF) |
| // should be represented as a surrogate pair (two UTF-16 units) |
| // *even* where wchar_t is 32-bit (Linux and Mac). |
| // |
| // This is to help write tests for functions with string16 params until |
| // the C++ 0x UTF-16 literal is well-supported by compilers. |
| string16 BuildString16(const wchar_t* s) { |
| #if defined(WCHAR_T_IS_UTF16) |
| return string16(s); |
| #elif defined(WCHAR_T_IS_UTF32) |
| string16 u16; |
| while (*s != 0) { |
| DCHECK(static_cast<unsigned int>(*s) <= 0xFFFFu); |
| u16.push_back(*s++); |
| } |
| return u16; |
| #endif |
| } |
| |
| } // namespace |
| |
| TEST(UTFOffsetStringConversionsTest, AdjustOffset) { |
| struct UTF8ToWideCase { |
| const char* utf8; |
| size_t input_offset; |
| size_t output_offset; |
| } utf8_to_wide_cases[] = { |
| {"", 0, std::wstring::npos}, |
| {"\xe4\xbd\xa0\xe5\xa5\xbd", 1, std::wstring::npos}, |
| {"\xe4\xbd\xa0\xe5\xa5\xbd", 3, 1}, |
| {"\xed\xb0\x80z", 3, 1}, |
| {"A\xF0\x90\x8C\x80z", 1, 1}, |
| {"A\xF0\x90\x8C\x80z", 2, std::wstring::npos}, |
| #if defined(WCHAR_T_IS_UTF16) |
| {"A\xF0\x90\x8C\x80z", 5, 3}, |
| #elif defined(WCHAR_T_IS_UTF32) |
| {"A\xF0\x90\x8C\x80z", 5, 2}, |
| #endif |
| }; |
| for (size_t i = 0; i < ARRAYSIZE_UNSAFE(utf8_to_wide_cases); ++i) { |
| size_t offset = utf8_to_wide_cases[i].input_offset; |
| UTF8ToWideAndAdjustOffset(utf8_to_wide_cases[i].utf8, &offset); |
| EXPECT_EQ(utf8_to_wide_cases[i].output_offset, offset); |
| } |
| |
| #if defined(WCHAR_T_IS_UTF32) |
| struct UTF16ToWideCase { |
| const wchar_t* wide; |
| size_t input_offset; |
| size_t output_offset; |
| } utf16_to_wide_cases[] = { |
| {L"\xD840\xDC00\x4E00", 0, 0}, |
| {L"\xD840\xDC00\x4E00", 1, std::wstring::npos}, |
| {L"\xD840\xDC00\x4E00", 2, 1}, |
| }; |
| for (size_t i = 0; i < ARRAYSIZE_UNSAFE(utf16_to_wide_cases); ++i) { |
| size_t offset = utf16_to_wide_cases[i].input_offset; |
| UTF16ToWideAndAdjustOffset(BuildString16(utf16_to_wide_cases[i].wide), |
| &offset); |
| EXPECT_EQ(utf16_to_wide_cases[i].output_offset, offset); |
| } |
| #endif |
| } |
| |
| } // namaspace base |