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// Copyright 2014 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "net/server/http_connection.h"
#include <string>
#include "base/memory/ref_counted.h"
#include "base/strings/string_piece.h"
#include "testing/gtest/include/gtest/gtest.h"
namespace net {
namespace {
std::string GetTestString(int size) {
std::string test_string;
for (int i = 0; i < size; ++i) {
test_string.push_back('A' + (i % 26));
}
return test_string;
}
TEST(HttpConnectionTest, ReadIOBuffer_SetCapacity) {
scoped_refptr<HttpConnection::ReadIOBuffer> buffer =
base::MakeRefCounted<HttpConnection::ReadIOBuffer>();
EXPECT_EQ(HttpConnection::ReadIOBuffer::kInitialBufSize + 0,
buffer->GetCapacity());
EXPECT_EQ(HttpConnection::ReadIOBuffer::kInitialBufSize + 0,
buffer->RemainingCapacity());
EXPECT_EQ(0, buffer->GetSize());
const int kNewCapacity = HttpConnection::ReadIOBuffer::kInitialBufSize + 128;
buffer->SetCapacity(kNewCapacity);
EXPECT_EQ(kNewCapacity, buffer->GetCapacity());
EXPECT_EQ(kNewCapacity, buffer->RemainingCapacity());
EXPECT_EQ(0, buffer->GetSize());
}
TEST(HttpConnectionTest, ReadIOBuffer_SetCapacity_WithData) {
scoped_refptr<HttpConnection::ReadIOBuffer> buffer =
base::MakeRefCounted<HttpConnection::ReadIOBuffer>();
EXPECT_EQ(HttpConnection::ReadIOBuffer::kInitialBufSize + 0,
buffer->GetCapacity());
EXPECT_EQ(HttpConnection::ReadIOBuffer::kInitialBufSize + 0,
buffer->RemainingCapacity());
// Write arbitrary data up to kInitialBufSize.
const std::string kReadData(
GetTestString(HttpConnection::ReadIOBuffer::kInitialBufSize));
memcpy(buffer->data(), kReadData.data(), kReadData.size());
buffer->DidRead(kReadData.size());
EXPECT_EQ(HttpConnection::ReadIOBuffer::kInitialBufSize + 0,
buffer->GetCapacity());
EXPECT_EQ(HttpConnection::ReadIOBuffer::kInitialBufSize -
static_cast<int>(kReadData.size()),
buffer->RemainingCapacity());
EXPECT_EQ(static_cast<int>(kReadData.size()), buffer->GetSize());
EXPECT_EQ(kReadData,
base::StringPiece(buffer->StartOfBuffer(), buffer->GetSize()));
// Check if read data in the buffer is same after SetCapacity().
const int kNewCapacity = HttpConnection::ReadIOBuffer::kInitialBufSize + 128;
buffer->SetCapacity(kNewCapacity);
EXPECT_EQ(kNewCapacity, buffer->GetCapacity());
EXPECT_EQ(kNewCapacity - static_cast<int>(kReadData.size()),
buffer->RemainingCapacity());
EXPECT_EQ(static_cast<int>(kReadData.size()), buffer->GetSize());
EXPECT_EQ(kReadData,
base::StringPiece(buffer->StartOfBuffer(), buffer->GetSize()));
}
TEST(HttpConnectionTest, ReadIOBuffer_IncreaseCapacity) {
scoped_refptr<HttpConnection::ReadIOBuffer> buffer =
base::MakeRefCounted<HttpConnection::ReadIOBuffer>();
EXPECT_TRUE(buffer->IncreaseCapacity());
const int kExpectedInitialBufSize =
HttpConnection::ReadIOBuffer::kInitialBufSize *
HttpConnection::ReadIOBuffer::kCapacityIncreaseFactor;
EXPECT_EQ(kExpectedInitialBufSize, buffer->GetCapacity());
EXPECT_EQ(kExpectedInitialBufSize, buffer->RemainingCapacity());
EXPECT_EQ(0, buffer->GetSize());
// Increase capacity until it fails.
while (buffer->IncreaseCapacity());
EXPECT_FALSE(buffer->IncreaseCapacity());
EXPECT_EQ(HttpConnection::ReadIOBuffer::kDefaultMaxBufferSize + 0,
buffer->max_buffer_size());
EXPECT_EQ(HttpConnection::ReadIOBuffer::kDefaultMaxBufferSize + 0,
buffer->GetCapacity());
// Enlarge capacity limit.
buffer->set_max_buffer_size(buffer->max_buffer_size() * 2);
EXPECT_TRUE(buffer->IncreaseCapacity());
EXPECT_EQ(HttpConnection::ReadIOBuffer::kDefaultMaxBufferSize *
HttpConnection::ReadIOBuffer::kCapacityIncreaseFactor,
buffer->GetCapacity());
// Shrink capacity limit. It doesn't change capacity itself.
buffer->set_max_buffer_size(
HttpConnection::ReadIOBuffer::kDefaultMaxBufferSize / 2);
EXPECT_FALSE(buffer->IncreaseCapacity());
EXPECT_EQ(HttpConnection::ReadIOBuffer::kDefaultMaxBufferSize *
HttpConnection::ReadIOBuffer::kCapacityIncreaseFactor,
buffer->GetCapacity());
}
TEST(HttpConnectionTest, ReadIOBuffer_IncreaseCapacity_WithData) {
scoped_refptr<HttpConnection::ReadIOBuffer> buffer =
base::MakeRefCounted<HttpConnection::ReadIOBuffer>();
EXPECT_TRUE(buffer->IncreaseCapacity());
const int kExpectedInitialBufSize =
HttpConnection::ReadIOBuffer::kInitialBufSize *
HttpConnection::ReadIOBuffer::kCapacityIncreaseFactor;
EXPECT_EQ(kExpectedInitialBufSize, buffer->GetCapacity());
EXPECT_EQ(kExpectedInitialBufSize, buffer->RemainingCapacity());
EXPECT_EQ(0, buffer->GetSize());
// Write arbitrary data up to kExpectedInitialBufSize.
std::string kReadData(GetTestString(kExpectedInitialBufSize));
memcpy(buffer->data(), kReadData.data(), kReadData.size());
buffer->DidRead(kReadData.size());
EXPECT_EQ(kExpectedInitialBufSize, buffer->GetCapacity());
EXPECT_EQ(kExpectedInitialBufSize - static_cast<int>(kReadData.size()),
buffer->RemainingCapacity());
EXPECT_EQ(static_cast<int>(kReadData.size()), buffer->GetSize());
EXPECT_EQ(kReadData,
base::StringPiece(buffer->StartOfBuffer(), buffer->GetSize()));
// Increase capacity until it fails and check if read data in the buffer is
// same.
while (buffer->IncreaseCapacity());
EXPECT_FALSE(buffer->IncreaseCapacity());
EXPECT_EQ(HttpConnection::ReadIOBuffer::kDefaultMaxBufferSize + 0,
buffer->max_buffer_size());
EXPECT_EQ(HttpConnection::ReadIOBuffer::kDefaultMaxBufferSize + 0,
buffer->GetCapacity());
EXPECT_EQ(HttpConnection::ReadIOBuffer::kDefaultMaxBufferSize -
static_cast<int>(kReadData.size()),
buffer->RemainingCapacity());
EXPECT_EQ(static_cast<int>(kReadData.size()), buffer->GetSize());
EXPECT_EQ(kReadData,
base::StringPiece(buffer->StartOfBuffer(), buffer->GetSize()));
}
TEST(HttpConnectionTest, ReadIOBuffer_DidRead_DidConsume) {
scoped_refptr<HttpConnection::ReadIOBuffer> buffer =
base::MakeRefCounted<HttpConnection::ReadIOBuffer>();
const char* start_of_buffer = buffer->StartOfBuffer();
EXPECT_EQ(start_of_buffer, buffer->data());
// Read data.
const int kReadLength = 128;
const std::string kReadData(GetTestString(kReadLength));
memcpy(buffer->data(), kReadData.data(), kReadLength);
buffer->DidRead(kReadLength);
// No change in total capacity.
EXPECT_EQ(HttpConnection::ReadIOBuffer::kInitialBufSize + 0,
buffer->GetCapacity());
// Change in unused capacity because of read data.
EXPECT_EQ(HttpConnection::ReadIOBuffer::kInitialBufSize - kReadLength,
buffer->RemainingCapacity());
EXPECT_EQ(kReadLength, buffer->GetSize());
// No change in start pointers of read data.
EXPECT_EQ(start_of_buffer, buffer->StartOfBuffer());
// Change in start pointer of unused buffer.
EXPECT_EQ(start_of_buffer + kReadLength, buffer->data());
// Test read data.
EXPECT_EQ(kReadData, std::string(buffer->StartOfBuffer(), buffer->GetSize()));
// Consume data partially.
const int kConsumedLength = 32;
ASSERT_LT(kConsumedLength, kReadLength);
buffer->DidConsume(kConsumedLength);
// Capacity reduced because read data was too small comparing to capacity.
EXPECT_EQ(HttpConnection::ReadIOBuffer::kInitialBufSize /
HttpConnection::ReadIOBuffer::kCapacityIncreaseFactor,
buffer->GetCapacity());
// Change in unused capacity because of read data.
EXPECT_EQ(HttpConnection::ReadIOBuffer::kInitialBufSize /
HttpConnection::ReadIOBuffer::kCapacityIncreaseFactor -
kReadLength + kConsumedLength,
buffer->RemainingCapacity());
// Change in read size.
EXPECT_EQ(kReadLength - kConsumedLength, buffer->GetSize());
// Start data could be changed even when capacity is reduced.
start_of_buffer = buffer->StartOfBuffer();
// Change in start pointer of unused buffer.
EXPECT_EQ(start_of_buffer + kReadLength - kConsumedLength, buffer->data());
// Change in read data.
EXPECT_EQ(kReadData.substr(kConsumedLength),
std::string(buffer->StartOfBuffer(), buffer->GetSize()));
// Read more data.
const int kReadLength2 = 64;
buffer->DidRead(kReadLength2);
// No change in total capacity.
EXPECT_EQ(HttpConnection::ReadIOBuffer::kInitialBufSize /
HttpConnection::ReadIOBuffer::kCapacityIncreaseFactor,
buffer->GetCapacity());
// Change in unused capacity because of read data.
EXPECT_EQ(HttpConnection::ReadIOBuffer::kInitialBufSize /
HttpConnection::ReadIOBuffer::kCapacityIncreaseFactor -
kReadLength + kConsumedLength - kReadLength2,
buffer->RemainingCapacity());
// Change in read size
EXPECT_EQ(kReadLength - kConsumedLength + kReadLength2, buffer->GetSize());
// No change in start pointer of read part.
EXPECT_EQ(start_of_buffer, buffer->StartOfBuffer());
// Change in start pointer of unused buffer.
EXPECT_EQ(start_of_buffer + kReadLength - kConsumedLength + kReadLength2,
buffer->data());
// Consume data fully.
buffer->DidConsume(kReadLength - kConsumedLength + kReadLength2);
// Capacity reduced again because read data was too small.
EXPECT_EQ(HttpConnection::ReadIOBuffer::kInitialBufSize /
HttpConnection::ReadIOBuffer::kCapacityIncreaseFactor /
HttpConnection::ReadIOBuffer::kCapacityIncreaseFactor,
buffer->GetCapacity());
EXPECT_EQ(HttpConnection::ReadIOBuffer::kInitialBufSize /
HttpConnection::ReadIOBuffer::kCapacityIncreaseFactor /
HttpConnection::ReadIOBuffer::kCapacityIncreaseFactor,
buffer->RemainingCapacity());
// All reverts to initial because no data is left.
EXPECT_EQ(0, buffer->GetSize());
// Start data could be changed even when capacity is reduced.
start_of_buffer = buffer->StartOfBuffer();
EXPECT_EQ(start_of_buffer, buffer->data());
}
TEST(HttpConnectionTest, QueuedWriteIOBuffer_Append_DidConsume) {
scoped_refptr<HttpConnection::QueuedWriteIOBuffer> buffer =
base::MakeRefCounted<HttpConnection::QueuedWriteIOBuffer>();
EXPECT_TRUE(buffer->IsEmpty());
EXPECT_EQ(0, buffer->GetSizeToWrite());
EXPECT_EQ(0, buffer->total_size());
const std::string kData("data to write");
EXPECT_TRUE(buffer->Append(kData));
EXPECT_FALSE(buffer->IsEmpty());
EXPECT_EQ(static_cast<int>(kData.size()), buffer->GetSizeToWrite());
EXPECT_EQ(static_cast<int>(kData.size()), buffer->total_size());
// First data to write is same to kData.
EXPECT_EQ(kData, base::StringPiece(buffer->data(), buffer->GetSizeToWrite()));
const std::string kData2("more data to write");
EXPECT_TRUE(buffer->Append(kData2));
EXPECT_FALSE(buffer->IsEmpty());
// No change in size to write.
EXPECT_EQ(static_cast<int>(kData.size()), buffer->GetSizeToWrite());
// Change in total size.
EXPECT_EQ(static_cast<int>(kData.size() + kData2.size()),
buffer->total_size());
// First data to write has not been changed. Same to kData.
EXPECT_EQ(kData, base::StringPiece(buffer->data(), buffer->GetSizeToWrite()));
// Consume data partially.
const int kConsumedLength = kData.length() - 1;
buffer->DidConsume(kConsumedLength);
EXPECT_FALSE(buffer->IsEmpty());
// Change in size to write.
EXPECT_EQ(static_cast<int>(kData.size()) - kConsumedLength,
buffer->GetSizeToWrite());
// Change in total size.
EXPECT_EQ(static_cast<int>(kData.size() + kData2.size()) - kConsumedLength,
buffer->total_size());
// First data to write has shrinked.
EXPECT_EQ(kData.substr(kConsumedLength),
base::StringPiece(buffer->data(), buffer->GetSizeToWrite()));
// Consume first data fully.
buffer->DidConsume(kData.size() - kConsumedLength);
EXPECT_FALSE(buffer->IsEmpty());
// Now, size to write is size of data added second.
EXPECT_EQ(static_cast<int>(kData2.size()), buffer->GetSizeToWrite());
// Change in total size.
EXPECT_EQ(static_cast<int>(kData2.size()), buffer->total_size());
// First data to write has changed to kData2.
EXPECT_EQ(kData2,
base::StringPiece(buffer->data(), buffer->GetSizeToWrite()));
// Consume second data fully.
buffer->DidConsume(kData2.size());
EXPECT_TRUE(buffer->IsEmpty());
EXPECT_EQ(0, buffer->GetSizeToWrite());
EXPECT_EQ(0, buffer->total_size());
}
TEST(HttpConnectionTest, QueuedWriteIOBuffer_TotalSizeLimit) {
scoped_refptr<HttpConnection::QueuedWriteIOBuffer> buffer =
base::MakeRefCounted<HttpConnection::QueuedWriteIOBuffer>();
EXPECT_EQ(HttpConnection::QueuedWriteIOBuffer::kDefaultMaxBufferSize + 0,
buffer->max_buffer_size());
// Set total size limit very small.
buffer->set_max_buffer_size(10);
const int kDataLength = 4;
const std::string kData(kDataLength, 'd');
EXPECT_TRUE(buffer->Append(kData));
EXPECT_EQ(kDataLength, buffer->total_size());
EXPECT_TRUE(buffer->Append(kData));
EXPECT_EQ(kDataLength * 2, buffer->total_size());
// Cannot append more data because it exceeds the limit.
EXPECT_FALSE(buffer->Append(kData));
EXPECT_EQ(kDataLength * 2, buffer->total_size());
// Consume data partially.
const int kConsumedLength = 2;
buffer->DidConsume(kConsumedLength);
EXPECT_EQ(kDataLength * 2 - kConsumedLength, buffer->total_size());
// Can add more data.
EXPECT_TRUE(buffer->Append(kData));
EXPECT_EQ(kDataLength * 3 - kConsumedLength, buffer->total_size());
// Cannot append more data because it exceeds the limit.
EXPECT_FALSE(buffer->Append(kData));
EXPECT_EQ(kDataLength * 3 - kConsumedLength, buffer->total_size());
// Enlarge limit.
buffer->set_max_buffer_size(20);
// Can add more data.
EXPECT_TRUE(buffer->Append(kData));
EXPECT_EQ(kDataLength * 4 - kConsumedLength, buffer->total_size());
}
TEST(HttpConnectionTest, QueuedWriteIOBuffer_DataPointerStability) {
// This is a regression test that makes sure that QueuedWriteIOBuffer deals
// with base::queue's semantics differences vs. std::queue right, and still
// makes sure our data() pointers are stable.
scoped_refptr<HttpConnection::QueuedWriteIOBuffer> buffer =
base::MakeRefCounted<HttpConnection::QueuedWriteIOBuffer>();
// We append a short string to make it fit within any short string
// optimization, so that if the underlying queue moves the std::string,
// the data should change.
buffer->Append("abcdefgh");
// Read part of it, to make sure this handles the case of data() pointing
// to something other than start of string right.
buffer->DidConsume(3);
const char* old_data = buffer->data();
EXPECT_EQ("defgh", base::StringPiece(buffer->data(), 5));
// Now append a whole bunch of other things to make the underlying queue
// grow, and likely need to move stuff around in memory.
for (int i = 0; i < 256; ++i)
buffer->Append("some other string data");
// data() should still be right.
EXPECT_EQ("defgh", base::StringPiece(buffer->data(), 5));
// ... it should also be bitwise the same, since the IOBuffer can get passed
// to async calls and then have Append's come in.
EXPECT_TRUE(buffer->data() == old_data);
}
} // namespace
} // namespace net
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