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// 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.
#include <algorithm>
#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 {
static const size_t kNpos = string16::npos;
} // namespace
TEST(UTFOffsetStringConversionsTest, AdjustOffset) {
struct UTF8ToUTF16Case {
const char* utf8;
size_t input_offset;
size_t output_offset;
} utf8_to_utf16_cases[] = {
{"", 0, kNpos},
{"\xe4\xbd\xa0\xe5\xa5\xbd", 1, kNpos},
{"\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, kNpos},
{"A\xF0\x90\x8C\x80z", 5, 3},
};
for (size_t i = 0; i < ARRAYSIZE_UNSAFE(utf8_to_utf16_cases); ++i) {
size_t offset = utf8_to_utf16_cases[i].input_offset;
UTF8ToUTF16AndAdjustOffset(utf8_to_utf16_cases[i].utf8, &offset);
EXPECT_EQ(utf8_to_utf16_cases[i].output_offset, offset);
}
struct UTF16ToUTF8Case {
char16 utf16[10];
size_t input_offset;
size_t output_offset;
} utf16_to_utf8_cases[] = {
{{}, 0, kNpos},
// Converted to 3-byte utf-8 sequences
{{0x5909, 0x63DB}, 2, kNpos},
{{0x5909, 0x63DB}, 1, 3},
// Converted to 2-byte utf-8 sequences
{{'A', 0x00bc, 0x00be, 'z'}, 1, 1},
{{'A', 0x00bc, 0x00be, 'z'}, 2, 3},
{{'A', 0x00bc, 0x00be, 'z'}, 3, 5},
// Surrogate pair
{{'A', 0xd800, 0xdf00, 'z'}, 1, 1},
{{'A', 0xd800, 0xdf00, 'z'}, 2, kNpos},
{{'A', 0xd800, 0xdf00, 'z'}, 3, 5},
};
for (size_t i = 0; i < ARRAYSIZE_UNSAFE(utf16_to_utf8_cases); ++i) {
size_t offset = utf16_to_utf8_cases[i].input_offset;
UTF16ToUTF8AndAdjustOffset(utf16_to_utf8_cases[i].utf16, &offset);
EXPECT_EQ(utf16_to_utf8_cases[i].output_offset, offset);
}
}
TEST(UTFOffsetStringConversionsTest, LimitOffsets) {
const size_t kLimit = 10;
const size_t kItems = 20;
std::vector<size_t> size_ts;
for (size_t t = 0; t < kItems; ++t)
size_ts.push_back(t);
std::for_each(size_ts.begin(), size_ts.end(),
LimitOffset<string16>(kLimit));
size_t unlimited_count = 0;
for (std::vector<size_t>::iterator ti = size_ts.begin(); ti != size_ts.end();
++ti) {
if (*ti < kLimit && *ti != kNpos)
++unlimited_count;
}
EXPECT_EQ(10U, unlimited_count);
// Reverse the values in the vector and try again.
size_ts.clear();
for (size_t t = kItems; t > 0; --t)
size_ts.push_back(t - 1);
std::for_each(size_ts.begin(), size_ts.end(),
LimitOffset<string16>(kLimit));
unlimited_count = 0;
for (std::vector<size_t>::iterator ti = size_ts.begin(); ti != size_ts.end();
++ti) {
if (*ti < kLimit && *ti != kNpos)
++unlimited_count;
}
EXPECT_EQ(10U, unlimited_count);
}
TEST(UTFOffsetStringConversionsTest, AdjustOffsets) {
// Imagine we have strings as shown in the following cases where the
// X's represent encoded characters.
// 1: abcXXXdef ==> abcXdef
{
std::vector<size_t> offsets;
for (size_t t = 0; t < 9; ++t)
offsets.push_back(t);
{
OffsetAdjuster offset_adjuster(&offsets);
offset_adjuster.Add(OffsetAdjuster::Adjustment(3, 3, 1));
}
size_t expected_1[] = {0, 1, 2, 3, kNpos, kNpos, 4, 5, 6};
EXPECT_EQ(offsets.size(), arraysize(expected_1));
for (size_t i = 0; i < arraysize(expected_1); ++i)
EXPECT_EQ(expected_1[i], offsets[i]);
}
// 2: XXXaXXXXbcXXXXXXXdefXXX ==> XaXXbcXXXXdefX
{
std::vector<size_t> offsets;
for (size_t t = 0; t < 23; ++t)
offsets.push_back(t);
{
OffsetAdjuster offset_adjuster(&offsets);
offset_adjuster.Add(OffsetAdjuster::Adjustment(0, 3, 1));
offset_adjuster.Add(OffsetAdjuster::Adjustment(4, 4, 2));
offset_adjuster.Add(OffsetAdjuster::Adjustment(10, 7, 4));
offset_adjuster.Add(OffsetAdjuster::Adjustment(20, 3, 1));
}
size_t expected_2[] = {0, kNpos, kNpos, 1, 2, kNpos, kNpos, kNpos, 4, 5, 6,
kNpos, kNpos, kNpos, kNpos, kNpos, kNpos, 10, 11, 12,
13, kNpos, kNpos};
EXPECT_EQ(offsets.size(), arraysize(expected_2));
for (size_t i = 0; i < arraysize(expected_2); ++i)
EXPECT_EQ(expected_2[i], offsets[i]);
}
// 3: XXXaXXXXbcdXXXeXX ==> aXXXXbcdXXXe
{
std::vector<size_t> offsets;
for (size_t t = 0; t < 17; ++t)
offsets.push_back(t);
{
OffsetAdjuster offset_adjuster(&offsets);
offset_adjuster.Add(OffsetAdjuster::Adjustment(0, 3, 0));
offset_adjuster.Add(OffsetAdjuster::Adjustment(4, 4, 4));
offset_adjuster.Add(OffsetAdjuster::Adjustment(11, 3, 3));
offset_adjuster.Add(OffsetAdjuster::Adjustment(15, 2, 0));
}
size_t expected_3[] = {kNpos, kNpos, kNpos, 0, 1, kNpos, kNpos, kNpos, 5, 6,
7, 8, kNpos, kNpos, 11, kNpos, kNpos};
EXPECT_EQ(offsets.size(), arraysize(expected_3));
for (size_t i = 0; i < arraysize(expected_3); ++i)
EXPECT_EQ(expected_3[i], offsets[i]);
}
}
} // namaspace base
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