1 // Copyright (c) 2012 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 "testing/gtest/include/gtest/gtest.h" 6 #include "ui/gfx/utf16_indexing.h" 7 8 namespace gfx { 9 10 TEST(UTF16IndexingTest, IndexOffsetConversions) { 11 // Valid surrogate pair surrounded by unpaired surrogates 12 const char16 foo[] = {0xDC00, 0xD800, 0xD800, 0xDFFF, 0xDFFF, 0xDBFF, 0}; 13 const string16 s(foo); 14 const size_t the_invalid_index = 3; 15 for (size_t i = 0; i <= s.length(); ++i) 16 EXPECT_EQ(i != the_invalid_index, IsValidCodePointIndex(s, i)); 17 for (size_t i = 0; i <= s.length(); ++i) { 18 for (size_t j = i; j <= s.length(); ++j) { 19 ptrdiff_t offset = static_cast<ptrdiff_t>(j - i); 20 if (i <= the_invalid_index && j > the_invalid_index) 21 --offset; 22 EXPECT_EQ(offset, UTF16IndexToOffset(s, i, j)); 23 EXPECT_EQ(-offset, UTF16IndexToOffset(s, j, i)); 24 size_t adjusted_j = (j == the_invalid_index) ? j + 1 : j; 25 EXPECT_EQ(adjusted_j, UTF16OffsetToIndex(s, i, offset)); 26 size_t adjusted_i = (i == the_invalid_index) ? i + 1 : i; 27 EXPECT_EQ(adjusted_i, UTF16OffsetToIndex(s, j, -offset)); 28 } 29 } 30 } 31 32 } // namespace gfx 33
