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/*
* Copyright 2004 The WebRTC Project Authors. All rights reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
#include "rtc_base/buffer.h"
#include <cstddef>
#include <cstdint>
#include <cstring>
#include <utility>
#include "absl/strings/string_view.h"
#include "api/array_view.h"
#include "rtc_base/checks.h"
#include "test/gmock.h"
#include "test/gtest.h"
namespace webrtc {
namespace {
using ::testing::ElementsAre;
using ::testing::ElementsAreArray;
// clang-format off
const uint8_t kTestData[] = {0x0, 0x1, 0x2, 0x3, 0x4, 0x5, 0x6, 0x7,
0x8, 0x9, 0xa, 0xb, 0xc, 0xd, 0xe, 0xf};
// clang-format on
void TestBuf(const Buffer& b1, size_t size, size_t capacity) {
EXPECT_EQ(b1.size(), size);
EXPECT_EQ(b1.capacity(), capacity);
}
} // namespace
TEST(BufferTest, TestConstructEmpty) {
TestBuf(Buffer(), 0, 0);
TestBuf(Buffer(Buffer()), 0, 0);
TestBuf(Buffer(0), 0, 0);
// We can't use a literal 0 for the first argument, because C++ will allow
// that to be considered a null pointer, which makes the call ambiguous.
TestBuf(Buffer(0 + 0, 10), 0, 10);
TestBuf(Buffer(kTestData, 0), 0, 0);
TestBuf(Buffer(kTestData, 0, 20), 0, 20);
}
TEST(BufferTest, TestConstructData) {
Buffer buf(kTestData, 7);
EXPECT_EQ(buf.size(), 7u);
EXPECT_EQ(buf.capacity(), 7u);
EXPECT_FALSE(buf.empty());
EXPECT_EQ(0, memcmp(buf.data(), kTestData, 7));
}
TEST(BufferTest, TestConstructDataWithCapacity) {
Buffer buf(kTestData, 7, 14);
EXPECT_EQ(buf.size(), 7u);
EXPECT_EQ(buf.capacity(), 14u);
EXPECT_FALSE(buf.empty());
EXPECT_EQ(0, memcmp(buf.data(), kTestData, 7));
}
TEST(BufferTest, TestConstructArray) {
Buffer buf(kTestData);
EXPECT_EQ(buf.size(), 16u);
EXPECT_EQ(buf.capacity(), 16u);
EXPECT_FALSE(buf.empty());
EXPECT_EQ(0, memcmp(buf.data(), kTestData, 16));
}
TEST(BufferTest, TestStringViewConversion) {
Buffer buf(kTestData);
absl::string_view view = buf;
EXPECT_EQ(view,
absl::string_view(reinterpret_cast<const char*>(kTestData), 16u));
}
TEST(BufferTest, TestSetData) {
Buffer buf(kTestData + 4, 7);
buf.SetData(kTestData, 9);
EXPECT_EQ(buf.size(), 9u);
EXPECT_EQ(buf.capacity(), 7u * 3 / 2);
EXPECT_FALSE(buf.empty());
EXPECT_EQ(0, memcmp(buf.data(), kTestData, 9));
Buffer buf2;
buf2.SetData(buf);
EXPECT_EQ(buf.size(), 9u);
EXPECT_EQ(buf.capacity(), 7u * 3 / 2);
EXPECT_EQ(0, memcmp(buf.data(), kTestData, 9));
}
TEST(BufferTest, TestAppendData) {
Buffer buf(kTestData + 4, 3);
buf.AppendData(kTestData + 10, 2);
const int8_t exp[] = {0x4, 0x5, 0x6, 0xa, 0xb};
EXPECT_EQ(buf, Buffer(exp));
Buffer buf2;
buf2.AppendData(buf);
buf2.AppendData(ArrayView<uint8_t>(buf));
const int8_t exp2[] = {0x4, 0x5, 0x6, 0xa, 0xb, 0x4, 0x5, 0x6, 0xa, 0xb};
EXPECT_EQ(buf2, Buffer(exp2));
}
TEST(BufferTest, TestSetAndAppendWithUnknownArg) {
struct TestDataContainer {
size_t size() const { return 3; }
const uint8_t* data() const { return kTestData; }
};
Buffer buf;
buf.SetData(TestDataContainer());
EXPECT_EQ(3u, buf.size());
EXPECT_EQ(Buffer(kTestData, 3), buf);
EXPECT_THAT(buf, ElementsAre(0, 1, 2));
buf.AppendData(TestDataContainer());
EXPECT_EQ(6u, buf.size());
EXPECT_EQ(0, memcmp(buf.data(), kTestData, 3));
EXPECT_EQ(0, memcmp(buf.data() + 3, kTestData, 3));
EXPECT_THAT(buf, ElementsAre(0, 1, 2, 0, 1, 2));
}
TEST(BufferTest, TestSetSizeSmaller) {
Buffer buf;
buf.SetData(kTestData, 15);
buf.SetSize(10);
EXPECT_EQ(buf.size(), 10u);
EXPECT_EQ(buf.capacity(), 15u); // Hasn't shrunk.
EXPECT_FALSE(buf.empty());
EXPECT_EQ(buf, Buffer(kTestData, 10));
}
TEST(BufferTest, TestSetSizeLarger) {
Buffer buf;
buf.SetData(kTestData, 15);
EXPECT_EQ(buf.size(), 15u);
EXPECT_EQ(buf.capacity(), 15u);
EXPECT_FALSE(buf.empty());
buf.SetSize(20);
EXPECT_EQ(buf.size(), 20u);
EXPECT_EQ(buf.capacity(), 15u * 3 / 2); // Has grown.
EXPECT_FALSE(buf.empty());
EXPECT_EQ(0, memcmp(buf.data(), kTestData, 15));
}
TEST(BufferTest, TestEnsureCapacitySmaller) {
Buffer buf(kTestData);
const char* data = buf.data<char>();
buf.EnsureCapacity(4);
EXPECT_EQ(buf.capacity(), 16u); // Hasn't shrunk.
EXPECT_EQ(buf.data<char>(), data); // No reallocation.
EXPECT_FALSE(buf.empty());
EXPECT_EQ(buf, Buffer(kTestData));
}
TEST(BufferTest, TestEnsureCapacityLarger) {
Buffer buf(kTestData, 5);
buf.EnsureCapacity(10);
const int8_t* data = buf.data<int8_t>();
EXPECT_EQ(buf.capacity(), 10u);
buf.AppendData(kTestData + 5, 5);
EXPECT_EQ(buf.data<int8_t>(), data); // No reallocation.
EXPECT_FALSE(buf.empty());
EXPECT_EQ(buf, Buffer(kTestData, 10));
}
TEST(BufferTest, TestMoveConstruct) {
Buffer buf1(kTestData, 3, 40);
const uint8_t* data = buf1.data();
Buffer buf2(std::move(buf1));
EXPECT_EQ(buf2.size(), 3u);
EXPECT_EQ(buf2.capacity(), 40u);
EXPECT_EQ(buf2.data(), data);
EXPECT_FALSE(buf2.empty());
buf1.Clear();
EXPECT_EQ(buf1.size(), 0u);
EXPECT_EQ(buf1.capacity(), 0u);
EXPECT_EQ(buf1.data(), nullptr);
EXPECT_TRUE(buf1.empty());
}
TEST(BufferTest, TestMoveAssign) {
Buffer buf1(kTestData, 3, 40);
const uint8_t* data = buf1.data();
Buffer buf2(kTestData);
buf2 = std::move(buf1);
EXPECT_EQ(buf2.size(), 3u);
EXPECT_EQ(buf2.capacity(), 40u);
EXPECT_EQ(buf2.data(), data);
EXPECT_FALSE(buf2.empty());
buf1.Clear();
EXPECT_EQ(buf1.size(), 0u);
EXPECT_EQ(buf1.capacity(), 0u);
EXPECT_EQ(buf1.data(), nullptr);
EXPECT_TRUE(buf1.empty());
}
TEST(BufferTest, TestMoveAssignSelf) {
// Move self-assignment isn't required to produce a meaningful state, but
// should not leave the object in an inconsistent state. (Such inconsistent
// state could be caught by the DCHECKs and/or by the leak checker.) We need
// to be sneaky when testing this; if we're doing a too-obvious
// move-assign-to-self, clang's -Wself-move triggers at compile time.
Buffer buf(kTestData, 3, 40);
Buffer* buf_ptr = &buf;
buf = std::move(*buf_ptr);
}
TEST(BufferTest, TestSwap) {
Buffer buf1(kTestData, 3);
Buffer buf2(kTestData, 6, 40);
uint8_t* data1 = buf1.data();
uint8_t* data2 = buf2.data();
using std::swap;
swap(buf1, buf2);
EXPECT_EQ(buf1.size(), 6u);
EXPECT_EQ(buf1.capacity(), 40u);
EXPECT_EQ(buf1.data(), data2);
EXPECT_FALSE(buf1.empty());
EXPECT_EQ(buf2.size(), 3u);
EXPECT_EQ(buf2.capacity(), 3u);
EXPECT_EQ(buf2.data(), data1);
EXPECT_FALSE(buf2.empty());
}
TEST(BufferTest, TestClear) {
Buffer buf;
buf.SetData(kTestData, 15);
EXPECT_EQ(buf.size(), 15u);
EXPECT_EQ(buf.capacity(), 15u);
EXPECT_FALSE(buf.empty());
const char* data = buf.data<char>();
buf.Clear();
EXPECT_EQ(buf.size(), 0u);
EXPECT_EQ(buf.capacity(), 15u); // Hasn't shrunk.
EXPECT_EQ(buf.data<char>(), data); // No reallocation.
EXPECT_TRUE(buf.empty());
}
TEST(BufferTest, TestLambdaSetAppend) {
auto setter = [](ArrayView<uint8_t> av) {
for (int i = 0; i != 15; ++i)
av[i] = kTestData[i];
return 15;
};
Buffer buf1;
buf1.SetData(kTestData, 15);
buf1.AppendData(kTestData, 15);
Buffer buf2;
EXPECT_EQ(buf2.SetData(15, setter), 15u);
EXPECT_EQ(buf2.AppendData(15, setter), 15u);
EXPECT_EQ(buf1, buf2);
EXPECT_EQ(buf1.capacity(), buf2.capacity());
EXPECT_FALSE(buf1.empty());
EXPECT_FALSE(buf2.empty());
}
TEST(BufferTest, TestLambdaSetAppendSigned) {
auto setter = [](ArrayView<int8_t> av) {
for (int i = 0; i != 15; ++i)
av[i] = kTestData[i];
return 15;
};
Buffer buf1;
buf1.SetData(kTestData, 15);
buf1.AppendData(kTestData, 15);
Buffer buf2;
EXPECT_EQ(buf2.SetData<int8_t>(15, setter), 15u);
EXPECT_EQ(buf2.AppendData<int8_t>(15, setter), 15u);
EXPECT_EQ(buf1, buf2);
EXPECT_EQ(buf1.capacity(), buf2.capacity());
EXPECT_FALSE(buf1.empty());
EXPECT_FALSE(buf2.empty());
}
TEST(BufferTest, TestLambdaAppendEmpty) {
auto setter = [](ArrayView<uint8_t> av) {
for (int i = 0; i != 15; ++i)
av[i] = kTestData[i];
return 15;
};
Buffer buf1;
buf1.SetData(kTestData, 15);
Buffer buf2;
EXPECT_EQ(buf2.AppendData(15, setter), 15u);
EXPECT_EQ(buf1, buf2);
EXPECT_EQ(buf1.capacity(), buf2.capacity());
EXPECT_FALSE(buf1.empty());
EXPECT_FALSE(buf2.empty());
}
TEST(BufferTest, TestLambdaAppendPartial) {
auto setter = [](ArrayView<uint8_t> av) {
for (int i = 0; i != 7; ++i)
av[i] = kTestData[i];
return 7;
};
Buffer buf;
EXPECT_EQ(buf.AppendData(15, setter), 7u);
EXPECT_EQ(buf.size(), 7u); // Size is exactly what we wrote.
EXPECT_GE(buf.capacity(), 7u); // Capacity is valid.
EXPECT_NE(buf.data<char>(), nullptr); // Data is actually stored.
EXPECT_FALSE(buf.empty());
}
TEST(BufferTest, TestMutableLambdaSetAppend) {
uint8_t magic_number = 17;
auto setter = [magic_number](ArrayView<uint8_t> av) mutable {
for (int i = 0; i != 15; ++i) {
av[i] = magic_number;
++magic_number;
}
return 15;
};
EXPECT_EQ(magic_number, 17);
Buffer buf;
EXPECT_EQ(buf.SetData(15, setter), 15u);
EXPECT_EQ(buf.AppendData(15, setter), 15u);
EXPECT_EQ(buf.size(), 30u); // Size is exactly what we wrote.
EXPECT_GE(buf.capacity(), 30u); // Capacity is valid.
EXPECT_NE(buf.data<char>(), nullptr); // Data is actually stored.
EXPECT_FALSE(buf.empty());
for (uint8_t i = 0; i != buf.size(); ++i) {
EXPECT_EQ(buf.data()[i], magic_number + i);
}
}
TEST(BufferTest, TestBracketRead) {
Buffer buf(kTestData, 7);
EXPECT_EQ(buf.size(), 7u);
EXPECT_EQ(buf.capacity(), 7u);
EXPECT_NE(buf.data(), nullptr);
EXPECT_FALSE(buf.empty());
for (size_t i = 0; i != 7u; ++i) {
EXPECT_EQ(buf[i], kTestData[i]);
}
}
TEST(BufferTest, TestBracketReadConst) {
Buffer buf(kTestData, 7);
EXPECT_EQ(buf.size(), 7u);
EXPECT_EQ(buf.capacity(), 7u);
EXPECT_NE(buf.data(), nullptr);
EXPECT_FALSE(buf.empty());
const Buffer& cbuf = buf;
for (size_t i = 0; i != 7u; ++i) {
EXPECT_EQ(cbuf[i], kTestData[i]);
}
}
TEST(BufferTest, TestBracketWrite) {
Buffer buf(7);
EXPECT_EQ(buf.size(), 7u);
EXPECT_EQ(buf.capacity(), 7u);
EXPECT_NE(buf.data(), nullptr);
EXPECT_FALSE(buf.empty());
for (size_t i = 0; i != 7u; ++i) {
buf[i] = kTestData[i];
}
EXPECT_THAT(buf, ElementsAreArray(kTestData, 7));
}
TEST(BufferTest, TestBeginEnd) {
const Buffer cbuf(kTestData);
Buffer buf(kTestData);
auto* b1 = cbuf.begin();
for (auto& x : buf) {
EXPECT_EQ(*b1, x);
++b1;
++x;
}
EXPECT_EQ(cbuf.end(), b1);
auto* b2 = buf.begin();
for (auto& y : cbuf) {
EXPECT_EQ(*b2, y + 1);
++b2;
}
EXPECT_EQ(buf.end(), b2);
}
TEST(BufferTest, TestInt16) {
static constexpr int16_t test_data[] = {14, 15, 16, 17, 18};
BufferT<int16_t> buf(test_data);
EXPECT_EQ(buf.size(), 5u);
EXPECT_EQ(buf.capacity(), 5u);
EXPECT_NE(buf.data(), nullptr);
EXPECT_FALSE(buf.empty());
EXPECT_THAT(buf, ElementsAreArray(test_data));
BufferT<int16_t> buf2(test_data);
EXPECT_EQ(buf, buf2);
buf2[0] = 9;
EXPECT_NE(buf, buf2);
}
TEST(BufferTest, TestFloat) {
static constexpr float test_data[] = {14, 15, 16, 17, 18};
BufferT<float> buf;
EXPECT_EQ(buf.size(), 0u);
EXPECT_EQ(buf.capacity(), 0u);
EXPECT_EQ(buf.data(), nullptr);
EXPECT_TRUE(buf.empty());
buf.SetData(test_data);
EXPECT_EQ(buf.size(), 5u);
EXPECT_EQ(buf.capacity(), 5u);
EXPECT_NE(buf.data(), nullptr);
EXPECT_FALSE(buf.empty());
float* p1 = buf.data();
while (buf.data() == p1) {
buf.AppendData(test_data);
}
EXPECT_EQ(buf.size(), buf.capacity());
EXPECT_GT(buf.size(), 5u);
EXPECT_EQ(buf.size() % 5, 0u);
EXPECT_NE(buf.data(), nullptr);
for (size_t i = 0; i != buf.size(); ++i) {
EXPECT_EQ(test_data[i % 5], buf[i]);
}
}
TEST(BufferTest, TestStruct) {
struct BloodStone {
bool blood;
const char* stone;
};
BufferT<BloodStone> buf(4);
EXPECT_EQ(buf.size(), 4u);
EXPECT_EQ(buf.capacity(), 4u);
EXPECT_NE(buf.data(), nullptr);
EXPECT_FALSE(buf.empty());
BufferT<BloodStone*> buf2(4);
for (size_t i = 0; i < buf2.size(); ++i) {
buf2[i] = &buf[i];
}
static const char kObsidian[] = "obsidian";
buf2[2]->stone = kObsidian;
EXPECT_EQ(kObsidian, buf[2].stone);
}
TEST(BufferDeathTest, DieOnUseAfterMove) {
Buffer buf(17);
Buffer buf2 = std::move(buf);
EXPECT_EQ(buf2.size(), 17u);
#if RTC_DCHECK_IS_ON
#if GTEST_HAS_DEATH_TEST && !defined(WEBRTC_ANDROID)
EXPECT_DEATH(buf.empty(), "");
#endif
#else
EXPECT_TRUE(buf.empty());
#endif
}
TEST(ZeroOnFreeBufferTest, TestZeroOnSetData) {
ZeroOnFreeBuffer<uint8_t> buf(kTestData, 7);
const uint8_t* old_data = buf.data();
const size_t old_capacity = buf.capacity();
const size_t old_size = buf.size();
constexpr size_t offset = 1;
buf.SetData(kTestData + offset, 2);
// Sanity checks to make sure the underlying heap memory was not reallocated.
EXPECT_EQ(old_data, buf.data());
EXPECT_EQ(old_capacity, buf.capacity());
// The first two elements have been overwritten, and the remaining five have
// been zeroed.
EXPECT_EQ(kTestData[offset], buf[0]);
EXPECT_EQ(kTestData[offset + 1], buf[1]);
for (size_t i = 2; i < old_size; i++) {
EXPECT_EQ(0, old_data[i]);
}
}
TEST(ZeroOnFreeBufferTest, TestZeroOnSetDataFromSetter) {
static constexpr size_t offset = 1;
const auto setter = [](ArrayView<uint8_t> av) {
for (int i = 0; i != 2; ++i)
av[i] = kTestData[offset + i];
return 2;
};
ZeroOnFreeBuffer<uint8_t> buf(kTestData, 7);
const uint8_t* old_data = buf.data();
const size_t old_capacity = buf.capacity();
const size_t old_size = buf.size();
buf.SetData(2, setter);
// Sanity checks to make sure the underlying heap memory was not reallocated.
EXPECT_EQ(old_data, buf.data());
EXPECT_EQ(old_capacity, buf.capacity());
// The first two elements have been overwritten, and the remaining five have
// been zeroed.
EXPECT_EQ(kTestData[offset], buf[0]);
EXPECT_EQ(kTestData[offset + 1], buf[1]);
for (size_t i = 2; i < old_size; i++) {
EXPECT_EQ(0, old_data[i]);
}
}
TEST(ZeroOnFreeBufferTest, TestZeroOnSetSize) {
ZeroOnFreeBuffer<uint8_t> buf(kTestData, 7);
const uint8_t* old_data = buf.data();
const size_t old_capacity = buf.capacity();
const size_t old_size = buf.size();
buf.SetSize(2);
// Sanity checks to make sure the underlying heap memory was not reallocated.
EXPECT_EQ(old_data, buf.data());
EXPECT_EQ(old_capacity, buf.capacity());
// The first two elements have not been modified and the remaining five have
// been zeroed.
EXPECT_EQ(kTestData[0], buf[0]);
EXPECT_EQ(kTestData[1], buf[1]);
for (size_t i = 2; i < old_size; i++) {
EXPECT_EQ(0, old_data[i]);
}
}
TEST(ZeroOnFreeBufferTest, TestZeroOnClear) {
ZeroOnFreeBuffer<uint8_t> buf(kTestData, 7);
const uint8_t* old_data = buf.data();
const size_t old_capacity = buf.capacity();
const size_t old_size = buf.size();
buf.Clear();
// Sanity checks to make sure the underlying heap memory was not reallocated.
EXPECT_EQ(old_data, buf.data());
EXPECT_EQ(old_capacity, buf.capacity());
// The underlying memory was not released but cleared.
for (size_t i = 0; i < old_size; i++) {
EXPECT_EQ(0, old_data[i]);
}
}
} // namespace webrtc
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