| // Copyright (c) 2013 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/spdy/spdy_read_queue.h" |
| |
| #include <algorithm> |
| #include <cstddef> |
| #include <memory> |
| #include <string> |
| |
| #include "base/stl_util.h" |
| #include "net/spdy/spdy_buffer.h" |
| #include "testing/gtest/include/gtest/gtest.h" |
| |
| namespace net { |
| |
| namespace { |
| |
| const char kData[] = "SPDY read queue test data.\0Some more data."; |
| const size_t kDataSize = arraysize(kData); |
| |
| // Enqueues |data| onto |queue| in chunks of at most |max_buffer_size| |
| // bytes. |
| void EnqueueString(const std::string& data, |
| size_t max_buffer_size, |
| SpdyReadQueue* queue) { |
| ASSERT_GT(data.size(), 0u); |
| ASSERT_GT(max_buffer_size, 0u); |
| size_t old_total_size = queue->GetTotalSize(); |
| for (size_t i = 0; i < data.size();) { |
| size_t buffer_size = std::min(data.size() - i, max_buffer_size); |
| queue->Enqueue(std::unique_ptr<SpdyBuffer>( |
| new SpdyBuffer(data.data() + i, buffer_size))); |
| i += buffer_size; |
| EXPECT_FALSE(queue->IsEmpty()); |
| EXPECT_EQ(old_total_size + i, queue->GetTotalSize()); |
| } |
| } |
| |
| // Dequeues all bytes in |queue| in chunks of at most |
| // |max_buffer_size| bytes and returns the data as a string. |
| std::string DrainToString(size_t max_buffer_size, SpdyReadQueue* queue) { |
| std::string data; |
| |
| // Pad the buffer so we can detect out-of-bound writes. |
| size_t padding = std::max(static_cast<size_t>(4096), queue->GetTotalSize()); |
| size_t buffer_size_with_padding = padding + max_buffer_size + padding; |
| std::unique_ptr<char[]> buffer(new char[buffer_size_with_padding]); |
| std::memset(buffer.get(), 0, buffer_size_with_padding); |
| char* buffer_data = buffer.get() + padding; |
| |
| while (!queue->IsEmpty()) { |
| size_t old_total_size = queue->GetTotalSize(); |
| EXPECT_GT(old_total_size, 0u); |
| size_t dequeued_bytes = queue->Dequeue(buffer_data, max_buffer_size); |
| |
| // Make sure |queue| doesn't write past either end of its given |
| // boundaries. |
| for (int i = 1; i <= static_cast<int>(padding); ++i) { |
| EXPECT_EQ('\0', buffer_data[-i]) << -i; |
| } |
| for (size_t i = 0; i < padding; ++i) { |
| EXPECT_EQ('\0', buffer_data[max_buffer_size + i]) << i; |
| } |
| |
| data.append(buffer_data, dequeued_bytes); |
| EXPECT_EQ(dequeued_bytes, std::min(max_buffer_size, dequeued_bytes)); |
| EXPECT_EQ(queue->GetTotalSize(), old_total_size - dequeued_bytes); |
| } |
| EXPECT_TRUE(queue->IsEmpty()); |
| return data; |
| } |
| |
| // Enqueue a test string with the given enqueue/dequeue max buffer |
| // sizes. |
| void RunEnqueueDequeueTest(size_t enqueue_max_buffer_size, |
| size_t dequeue_max_buffer_size) { |
| std::string data(kData, kDataSize); |
| SpdyReadQueue read_queue; |
| EnqueueString(data, enqueue_max_buffer_size, &read_queue); |
| const std::string& drained_data = |
| DrainToString(dequeue_max_buffer_size, &read_queue); |
| EXPECT_EQ(data, drained_data); |
| } |
| |
| class SpdyReadQueueTest : public ::testing::Test {}; |
| |
| // Call RunEnqueueDequeueTest() with various buffer size combinatinos. |
| |
| TEST_F(SpdyReadQueueTest, LargeEnqueueAndDequeueBuffers) { |
| RunEnqueueDequeueTest(2 * kDataSize, 2 * kDataSize); |
| } |
| |
| TEST_F(SpdyReadQueueTest, OneByteEnqueueAndDequeueBuffers) { |
| RunEnqueueDequeueTest(1, 1); |
| } |
| |
| TEST_F(SpdyReadQueueTest, CoprimeBufferSizes) { |
| RunEnqueueDequeueTest(2, 3); |
| RunEnqueueDequeueTest(3, 2); |
| } |
| |
| } // namespace |
| |
| } // namespace net |