Revert "Revert of Replace StreamListenSocket with StreamSocket in HttpServer. (patchset #29 of http…

net/server/http_connection_unittest.cc

Index: net/server/http_connection_unittest.cc
diff --git a/net/server/http_connection_unittest.cc b/net/server/http_connection_unittest.cc
new file mode 100644
index 0000000000000000000000000000000000000000..488fd6fb15b40c07457c60f89cbe6b2b96a0a142
--- /dev/null
+++ b/net/server/http_connection_unittest.cc
@@ -0,0 +1,331 @@
+// Copyright 2014 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 "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(
+      new 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(
+      new 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(
+      new 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(
+      new 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(
+      new 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(
+      new 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(
+      new 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());
+}
+
+}  // namespace
+}  // namespace net