137 lines
4.3 KiB
C++
137 lines
4.3 KiB
C++
// Copyright 2013 The Chromium Authors
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#include "net/spdy/spdy_read_queue.h"
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#include <algorithm>
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#include <cstddef>
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#include <memory>
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#include <string>
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#include <utility>
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#include "base/functional/bind.h"
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#include "base/functional/callback.h"
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#include "net/spdy/spdy_buffer.h"
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#include "testing/gtest/include/gtest/gtest.h"
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namespace net::test {
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namespace {
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const char kData[] = "SPDY read queue test data.\0Some more data.";
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const size_t kDataSize = std::size(kData);
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// Enqueues |data| onto |queue| in chunks of at most |max_buffer_size|
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// bytes.
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void EnqueueString(const std::string& data,
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size_t max_buffer_size,
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SpdyReadQueue* queue) {
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ASSERT_GT(data.size(), 0u);
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ASSERT_GT(max_buffer_size, 0u);
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size_t old_total_size = queue->GetTotalSize();
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for (size_t i = 0; i < data.size();) {
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size_t buffer_size = std::min(data.size() - i, max_buffer_size);
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queue->Enqueue(std::make_unique<SpdyBuffer>(data.data() + i, buffer_size));
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i += buffer_size;
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EXPECT_FALSE(queue->IsEmpty());
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EXPECT_EQ(old_total_size + i, queue->GetTotalSize());
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}
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}
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// Dequeues all bytes in |queue| in chunks of at most
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// |max_buffer_size| bytes and returns the data as a string.
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std::string DrainToString(size_t max_buffer_size, SpdyReadQueue* queue) {
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std::string data;
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// Pad the buffer so we can detect out-of-bound writes.
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size_t padding = std::max(static_cast<size_t>(4096), queue->GetTotalSize());
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size_t buffer_size_with_padding = padding + max_buffer_size + padding;
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auto buffer = std::make_unique<char[]>(buffer_size_with_padding);
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std::memset(buffer.get(), 0, buffer_size_with_padding);
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char* buffer_data = buffer.get() + padding;
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while (!queue->IsEmpty()) {
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size_t old_total_size = queue->GetTotalSize();
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EXPECT_GT(old_total_size, 0u);
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size_t dequeued_bytes = queue->Dequeue(buffer_data, max_buffer_size);
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// Make sure |queue| doesn't write past either end of its given
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// boundaries.
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for (int i = 1; i <= static_cast<int>(padding); ++i) {
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EXPECT_EQ('\0', buffer_data[-i]) << -i;
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}
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for (size_t i = 0; i < padding; ++i) {
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EXPECT_EQ('\0', buffer_data[max_buffer_size + i]) << i;
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}
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data.append(buffer_data, dequeued_bytes);
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EXPECT_EQ(dequeued_bytes, std::min(max_buffer_size, dequeued_bytes));
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EXPECT_EQ(queue->GetTotalSize(), old_total_size - dequeued_bytes);
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}
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EXPECT_TRUE(queue->IsEmpty());
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return data;
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}
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// Enqueue a test string with the given enqueue/dequeue max buffer
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// sizes.
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void RunEnqueueDequeueTest(size_t enqueue_max_buffer_size,
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size_t dequeue_max_buffer_size) {
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std::string data(kData, kDataSize);
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SpdyReadQueue read_queue;
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EnqueueString(data, enqueue_max_buffer_size, &read_queue);
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const std::string& drained_data =
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DrainToString(dequeue_max_buffer_size, &read_queue);
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EXPECT_EQ(data, drained_data);
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}
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void OnBufferDiscarded(bool* discarded,
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size_t* discarded_bytes,
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size_t delta,
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SpdyBuffer::ConsumeSource consume_source) {
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EXPECT_EQ(SpdyBuffer::DISCARD, consume_source);
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*discarded = true;
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*discarded_bytes = delta;
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}
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} // namespace
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class SpdyReadQueueTest : public ::testing::Test {};
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// Call RunEnqueueDequeueTest() with various buffer size combinatinos.
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TEST_F(SpdyReadQueueTest, LargeEnqueueAndDequeueBuffers) {
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RunEnqueueDequeueTest(2 * kDataSize, 2 * kDataSize);
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}
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TEST_F(SpdyReadQueueTest, OneByteEnqueueAndDequeueBuffers) {
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RunEnqueueDequeueTest(1, 1);
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}
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TEST_F(SpdyReadQueueTest, CoprimeBufferSizes) {
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RunEnqueueDequeueTest(2, 3);
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RunEnqueueDequeueTest(3, 2);
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}
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TEST_F(SpdyReadQueueTest, Clear) {
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auto buffer = std::make_unique<SpdyBuffer>(kData, kDataSize);
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bool discarded = false;
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size_t discarded_bytes = 0;
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buffer->AddConsumeCallback(
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base::BindRepeating(&OnBufferDiscarded, &discarded, &discarded_bytes));
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SpdyReadQueue read_queue;
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read_queue.Enqueue(std::move(buffer));
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EXPECT_FALSE(discarded);
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EXPECT_EQ(0u, discarded_bytes);
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EXPECT_FALSE(read_queue.IsEmpty());
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read_queue.Clear();
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EXPECT_TRUE(discarded);
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EXPECT_EQ(kDataSize, discarded_bytes);
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EXPECT_TRUE(read_queue.IsEmpty());
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}
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} // namespace net::test
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