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Unified Diff: net/quic/quic_stream_sequencer_buffer_test.cc

Issue 2193073003: Move shared files in net/quic/ into net/quic/core/ (Closed) Base URL: https://chromium.googlesource.com/chromium/src.git@master
Patch Set: io_thread_unittest.cc Created 4 years, 5 months ago
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Index: net/quic/quic_stream_sequencer_buffer_test.cc
diff --git a/net/quic/quic_stream_sequencer_buffer_test.cc b/net/quic/quic_stream_sequencer_buffer_test.cc
deleted file mode 100644
index 4a848322ec5e1fccce18f0d6457a95afb9dca972..0000000000000000000000000000000000000000
--- a/net/quic/quic_stream_sequencer_buffer_test.cc
+++ /dev/null
@@ -1,1060 +0,0 @@
-// Copyright (c) 2015 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/quic/quic_stream_sequencer_buffer.h"
-
-#include <algorithm>
-#include <limits>
-#include <map>
-#include <string>
-#include <utility>
-
-#include "base/logging.h"
-#include "base/macros.h"
-#include "base/rand_util.h"
-#include "net/quic/test_tools/mock_clock.h"
-#include "net/quic/test_tools/quic_test_utils.h"
-#include "net/test/gtest_util.h"
-#include "testing/gmock/include/gmock/gmock.h"
-#include "testing/gmock_mutant.h"
-#include "testing/gtest/include/gtest/gtest.h"
-
-using std::min;
-using std::string;
-
-namespace net {
-
-namespace test {
-
-char GetCharFromIOVecs(size_t offset, iovec iov[], size_t count) {
- size_t start_offset = 0;
- for (size_t i = 0; i < count; i++) {
- if (iov[i].iov_len == 0) {
- continue;
- }
- size_t end_offset = start_offset + iov[i].iov_len - 1;
- if (offset >= start_offset && offset <= end_offset) {
- const char* buf = reinterpret_cast<const char*>(iov[i].iov_base);
- return buf[offset - start_offset];
- }
- start_offset += iov[i].iov_len;
- }
- LOG(ERROR) << "Could not locate char at offset " << offset << " in " << count
- << " iovecs";
- for (size_t i = 0; i < count; ++i) {
- LOG(ERROR) << " iov[" << i << "].iov_len = " << iov[i].iov_len;
- }
- return '\0';
-}
-
-static const size_t kBlockSizeBytes =
- QuicStreamSequencerBuffer::kBlockSizeBytes;
-typedef QuicStreamSequencerBuffer::BufferBlock BufferBlock;
-typedef QuicStreamSequencerBuffer::Gap Gap;
-typedef QuicStreamSequencerBuffer::FrameInfo FrameInfo;
-
-class QuicStreamSequencerBufferPeer {
- public:
- explicit QuicStreamSequencerBufferPeer(QuicStreamSequencerBuffer* buffer)
- : buffer_(buffer) {}
-
- // Read from this buffer_->into the given destination buffer_-> up to the
- // size of the destination. Returns the number of bytes read. Reading from
- // an empty buffer_->returns 0.
- size_t Read(char* dest_buffer, size_t size) {
- iovec dest;
- dest.iov_base = dest_buffer, dest.iov_len = size;
- return buffer_->Readv(&dest, 1);
- }
-
- // If buffer is empty, the blocks_ array must be empty, which means all
- // blocks are deallocated.
- bool CheckEmptyInvariants() {
- return !buffer_->Empty() || IsBlockArrayEmpty();
- }
-
- bool IsBlockArrayEmpty() {
- size_t count = buffer_->blocks_count_;
- for (size_t i = 0; i < count; i++) {
- if (buffer_->blocks_[i] != nullptr) {
- return false;
- }
- }
- return true;
- }
-
- bool CheckInitialState() {
- EXPECT_TRUE(buffer_->Empty() && buffer_->total_bytes_read_ == 0 &&
- buffer_->num_bytes_buffered_ == 0);
- return CheckBufferInvariants();
- }
-
- bool CheckBufferInvariants() {
- QuicStreamOffset data_span =
- buffer_->gaps_.back().begin_offset - buffer_->total_bytes_read_;
- bool capacity_sane = data_span <= buffer_->max_buffer_capacity_bytes_ &&
- data_span >= buffer_->num_bytes_buffered_;
- if (!capacity_sane) {
- LOG(ERROR) << "data span is larger than capacity.";
- LOG(ERROR) << "total read: " << buffer_->total_bytes_read_
- << " last byte: " << buffer_->gaps_.back().begin_offset;
- }
- bool total_read_sane =
- buffer_->gaps_.front().begin_offset >= buffer_->total_bytes_read_;
- if (!total_read_sane) {
- LOG(ERROR) << "read across 1st gap.";
- }
- bool read_offset_sane = buffer_->ReadOffset() < kBlockSizeBytes;
- if (!capacity_sane) {
- LOG(ERROR) << "read offset go beyond 1st block";
- }
- bool block_match_capacity =
- (buffer_->max_buffer_capacity_bytes_ <=
- buffer_->blocks_count_ * kBlockSizeBytes) &&
- (buffer_->max_buffer_capacity_bytes_ >
- (buffer_->blocks_count_ - 1) * kBlockSizeBytes);
- if (!capacity_sane) {
- LOG(ERROR) << "block number not match capcaity.";
- }
- bool block_retired_when_empty = CheckEmptyInvariants();
- if (!block_retired_when_empty) {
- LOG(ERROR) << "block is not retired after use.";
- }
- return capacity_sane && total_read_sane && read_offset_sane &&
- block_match_capacity && block_retired_when_empty;
- }
-
- size_t GetInBlockOffset(QuicStreamOffset offset) {
- return buffer_->GetInBlockOffset(offset);
- }
-
- BufferBlock* GetBlock(size_t index) { return buffer_->blocks_[index]; }
-
- int GapSize() { return buffer_->gaps_.size(); }
-
- std::list<Gap> GetGaps() { return buffer_->gaps_; }
-
- size_t max_buffer_capacity() { return buffer_->max_buffer_capacity_bytes_; }
-
- size_t ReadableBytes() { return buffer_->ReadableBytes(); }
-
- std::map<QuicStreamOffset, FrameInfo>* frame_arrival_time_map() {
- return &(buffer_->frame_arrival_time_map_);
- }
-
- void set_total_bytes_read(QuicStreamOffset total_bytes_read) {
- buffer_->total_bytes_read_ = total_bytes_read;
- }
-
- void set_gaps(const std::list<Gap>& gaps) { buffer_->gaps_ = gaps; }
-
- private:
- QuicStreamSequencerBuffer* buffer_;
-};
-
-namespace {
-
-class QuicStreamSequencerBufferTest : public testing::Test {
- public:
- void SetUp() override { Initialize(); }
-
- void ResetMaxCapacityBytes(size_t max_capacity_bytes) {
- max_capacity_bytes_ = max_capacity_bytes;
- Initialize();
- }
-
- protected:
- void Initialize() {
- buffer_.reset(new QuicStreamSequencerBuffer(max_capacity_bytes_));
- helper_.reset(new QuicStreamSequencerBufferPeer(buffer_.get()));
- }
-
- // Use 2.5 here to make sure the buffer has more than one block and its end
- // doesn't align with the end of a block in order to test all the offset
- // calculation.
- size_t max_capacity_bytes_ = 2.5 * kBlockSizeBytes;
-
- MockClock clock_;
- std::unique_ptr<QuicStreamSequencerBuffer> buffer_;
- std::unique_ptr<QuicStreamSequencerBufferPeer> helper_;
- string error_details_;
-};
-
-TEST_F(QuicStreamSequencerBufferTest, InitializationWithDifferentSizes) {
- const size_t kCapacity = 2 * QuicStreamSequencerBuffer::kBlockSizeBytes;
- ResetMaxCapacityBytes(kCapacity);
- EXPECT_EQ(max_capacity_bytes_, helper_->max_buffer_capacity());
- EXPECT_TRUE(helper_->CheckInitialState());
-
- const size_t kCapacity1 = 8 * QuicStreamSequencerBuffer::kBlockSizeBytes;
- ResetMaxCapacityBytes(kCapacity1);
- EXPECT_EQ(kCapacity1, helper_->max_buffer_capacity());
- EXPECT_TRUE(helper_->CheckInitialState());
-}
-
-TEST_F(QuicStreamSequencerBufferTest, ClearOnEmpty) {
- buffer_->Clear();
- EXPECT_TRUE(helper_->CheckBufferInvariants());
-}
-
-TEST_F(QuicStreamSequencerBufferTest, OnStreamData0length) {
- size_t written;
- QuicErrorCode error = buffer_->OnStreamData(800, "", clock_.ApproximateNow(),
- &written, &error_details_);
- EXPECT_EQ(error, QUIC_EMPTY_STREAM_FRAME_NO_FIN);
- EXPECT_TRUE(helper_->CheckBufferInvariants());
-}
-
-TEST_F(QuicStreamSequencerBufferTest, OnStreamDataWithinBlock) {
- string source(1024, 'a');
- size_t written;
- clock_.AdvanceTime(QuicTime::Delta::FromSeconds(1));
- QuicTime t = clock_.ApproximateNow();
- EXPECT_EQ(QUIC_NO_ERROR,
- buffer_->OnStreamData(800, source, t, &written, &error_details_));
- BufferBlock* block_ptr = helper_->GetBlock(0);
- for (size_t i = 0; i < source.size(); ++i) {
- ASSERT_EQ('a', block_ptr->buffer[helper_->GetInBlockOffset(800) + i]);
- }
- EXPECT_EQ(2, helper_->GapSize());
- std::list<Gap> gaps = helper_->GetGaps();
- EXPECT_EQ(800u, gaps.front().end_offset);
- EXPECT_EQ(1824u, gaps.back().begin_offset);
- auto* frame_map = helper_->frame_arrival_time_map();
- EXPECT_EQ(1u, frame_map->size());
- EXPECT_EQ(800u, frame_map->begin()->first);
- EXPECT_EQ(t, (*frame_map)[800].timestamp);
- EXPECT_TRUE(helper_->CheckBufferInvariants());
-}
-
-TEST_F(QuicStreamSequencerBufferTest, OnStreamDataWithOverlap) {
- string source(1024, 'a');
- // Write something into [800, 1824)
- size_t written;
- clock_.AdvanceTime(QuicTime::Delta::FromSeconds(1));
- QuicTime t1 = clock_.ApproximateNow();
- EXPECT_EQ(QUIC_NO_ERROR,
- buffer_->OnStreamData(800, source, t1, &written, &error_details_));
- // Try to write to [0, 1024) and [1024, 2048).
- // But no byte will be written since overlap.
- clock_.AdvanceTime(QuicTime::Delta::FromSeconds(1));
- QuicTime t2 = clock_.ApproximateNow();
- EXPECT_EQ(QUIC_OVERLAPPING_STREAM_DATA,
- buffer_->OnStreamData(0, source, t2, &written, &error_details_));
- EXPECT_EQ(QUIC_OVERLAPPING_STREAM_DATA,
- buffer_->OnStreamData(1024, source, t2, &written, &error_details_));
- auto* frame_map = helper_->frame_arrival_time_map();
- EXPECT_EQ(1u, frame_map->size());
- EXPECT_EQ(t1, (*frame_map)[800].timestamp);
-}
-
-TEST_F(QuicStreamSequencerBufferTest,
- OnStreamDataOverlapAndDuplicateCornerCases) {
- string source(1024, 'a');
- // Write something into [800, 1824)
- size_t written;
- buffer_->OnStreamData(800, source, clock_.ApproximateNow(), &written,
- &error_details_);
- source = string(800, 'b');
- // Try to write to [1, 801), but should fail due to overlapping
- EXPECT_EQ(QUIC_OVERLAPPING_STREAM_DATA,
- buffer_->OnStreamData(1, source, clock_.ApproximateNow(), &written,
- &error_details_));
- // write to [0, 800)
- EXPECT_EQ(QUIC_NO_ERROR,
- buffer_->OnStreamData(0, source, clock_.ApproximateNow(), &written,
- &error_details_));
- // Try to write one byte to [1823, 1824), but should count as duplicate
- string one_byte = "c";
- EXPECT_EQ(QUIC_NO_ERROR,
- buffer_->OnStreamData(1823, one_byte, clock_.ApproximateNow(),
- &written, &error_details_));
- EXPECT_EQ(0u, written);
- // write one byte to [1824, 1825)
- EXPECT_EQ(QUIC_NO_ERROR,
- buffer_->OnStreamData(1824, one_byte, clock_.ApproximateNow(),
- &written, &error_details_));
- auto* frame_map = helper_->frame_arrival_time_map();
- EXPECT_EQ(3u, frame_map->size());
- EXPECT_TRUE(helper_->CheckBufferInvariants());
-}
-
-TEST_F(QuicStreamSequencerBufferTest, OnStreamDataWithoutOverlap) {
- string source(1024, 'a');
- // Write something into [800, 1824).
- size_t written;
- EXPECT_EQ(QUIC_NO_ERROR,
- buffer_->OnStreamData(800, source, clock_.ApproximateNow(),
- &written, &error_details_));
- source = string(100, 'b');
- // Write something into [kBlockSizeBytes * 2 - 20, kBlockSizeBytes * 2 + 80).
- EXPECT_EQ(QUIC_NO_ERROR,
- buffer_->OnStreamData(kBlockSizeBytes * 2 - 20, source,
- clock_.ApproximateNow(), &written,
- &error_details_));
- EXPECT_EQ(3, helper_->GapSize());
- EXPECT_EQ(1024u + 100u, buffer_->BytesBuffered());
- EXPECT_TRUE(helper_->CheckBufferInvariants());
-}
-
-TEST_F(QuicStreamSequencerBufferTest, OnStreamDataInLongStreamWithOverlap) {
- // Assume a stream has already buffered almost 4GB.
- uint64_t total_bytes_read = pow(2, 32) - 1;
- helper_->set_total_bytes_read(total_bytes_read);
- helper_->set_gaps(std::list<Gap>(
- 1, Gap(total_bytes_read, std::numeric_limits<QuicStreamOffset>::max())));
-
- // Three new out of order frames arrive.
- const size_t kBytesToWrite = 100;
- string source(kBytesToWrite, 'a');
- size_t written;
- // Frame [2^32 + 500, 2^32 + 600).
- QuicStreamOffset offset = pow(2, 32) + 500;
- EXPECT_EQ(QUIC_NO_ERROR,
- buffer_->OnStreamData(offset, source, clock_.ApproximateNow(),
- &written, &error_details_));
- EXPECT_EQ(2, helper_->GapSize());
-
- // Frame [2^32 + 700, 2^32 + 800).
- offset = pow(2, 32) + 700;
- EXPECT_EQ(QUIC_NO_ERROR,
- buffer_->OnStreamData(offset, source, clock_.ApproximateNow(),
- &written, &error_details_));
- EXPECT_EQ(3, helper_->GapSize());
-
- // Another frame [2^32 + 300, 2^32 + 400).
- offset = pow(2, 32) + 300;
- EXPECT_EQ(QUIC_NO_ERROR,
- buffer_->OnStreamData(offset, source, clock_.ApproximateNow(),
- &written, &error_details_));
- EXPECT_EQ(4, helper_->GapSize());
-}
-
-TEST_F(QuicStreamSequencerBufferTest, OnStreamDataTillEnd) {
- // Write 50 bytes to the end.
- const size_t kBytesToWrite = 50;
- string source(kBytesToWrite, 'a');
- size_t written;
- EXPECT_EQ(QUIC_NO_ERROR,
- buffer_->OnStreamData(max_capacity_bytes_ - kBytesToWrite, source,
- clock_.ApproximateNow(), &written,
- &error_details_));
- EXPECT_EQ(50u, buffer_->BytesBuffered());
- EXPECT_TRUE(helper_->CheckBufferInvariants());
-}
-
-TEST_F(QuicStreamSequencerBufferTest, OnStreamDataTillEndCorner) {
- // Write 1 byte to the end.
- const size_t kBytesToWrite = 1;
- string source(kBytesToWrite, 'a');
- size_t written;
- EXPECT_EQ(QUIC_NO_ERROR,
- buffer_->OnStreamData(max_capacity_bytes_ - kBytesToWrite, source,
- clock_.ApproximateNow(), &written,
- &error_details_));
- EXPECT_EQ(1u, buffer_->BytesBuffered());
- EXPECT_TRUE(helper_->CheckBufferInvariants());
-}
-
-TEST_F(QuicStreamSequencerBufferTest, OnStreamDataBeyondCapacity) {
- string source(60, 'a');
- size_t written;
- EXPECT_EQ(QUIC_INTERNAL_ERROR,
- buffer_->OnStreamData(max_capacity_bytes_ - 50, source,
- clock_.ApproximateNow(), &written,
- &error_details_));
- EXPECT_TRUE(helper_->CheckBufferInvariants());
-
- source = "b";
- EXPECT_EQ(QUIC_INTERNAL_ERROR,
- buffer_->OnStreamData(max_capacity_bytes_, source,
- clock_.ApproximateNow(), &written,
- &error_details_));
- EXPECT_TRUE(helper_->CheckBufferInvariants());
-
- EXPECT_EQ(QUIC_INTERNAL_ERROR,
- buffer_->OnStreamData(max_capacity_bytes_ * 1000, source,
- clock_.ApproximateNow(), &written,
- &error_details_));
- EXPECT_TRUE(helper_->CheckBufferInvariants());
- EXPECT_EQ(0u, buffer_->BytesBuffered());
-}
-
-TEST_F(QuicStreamSequencerBufferTest, Readv100Bytes) {
- string source(1024, 'a');
- clock_.AdvanceTime(QuicTime::Delta::FromSeconds(1));
- QuicTime t1 = clock_.ApproximateNow();
- // Write something into [kBlockSizeBytes, kBlockSizeBytes + 1024).
- size_t written;
- buffer_->OnStreamData(kBlockSizeBytes, source, t1, &written, &error_details_);
- EXPECT_FALSE(buffer_->HasBytesToRead());
- source = string(100, 'b');
- clock_.AdvanceTime(QuicTime::Delta::FromSeconds(1));
- QuicTime t2 = clock_.ApproximateNow();
- // Write something into [0, 100).
- buffer_->OnStreamData(0, source, t2, &written, &error_details_);
- EXPECT_TRUE(buffer_->HasBytesToRead());
- EXPECT_EQ(2u, helper_->frame_arrival_time_map()->size());
- // Read into a iovec array with total capacity of 120 bytes.
- char dest[120];
- iovec iovecs[3]{iovec{dest, 40}, iovec{dest + 40, 40}, iovec{dest + 80, 40}};
- size_t read = buffer_->Readv(iovecs, 3);
- EXPECT_EQ(100u, read);
- EXPECT_EQ(100u, buffer_->BytesConsumed());
- EXPECT_EQ(source, string(dest, read));
- EXPECT_EQ(1u, helper_->frame_arrival_time_map()->size());
- EXPECT_TRUE(helper_->CheckBufferInvariants());
-}
-
-TEST_F(QuicStreamSequencerBufferTest, ReadvAcrossBlocks) {
- string source(kBlockSizeBytes + 50, 'a');
- // Write 1st block to full and extand 50 bytes to next block.
- size_t written;
- buffer_->OnStreamData(0, source, clock_.ApproximateNow(), &written,
- &error_details_);
- EXPECT_EQ(source.size(), helper_->ReadableBytes());
- // Iteratively read 512 bytes from buffer_-> Overwrite dest[] each time.
- char dest[512];
- while (helper_->ReadableBytes()) {
- std::fill(dest, dest + 512, 0);
- iovec iovecs[2]{iovec{dest, 256}, iovec{dest + 256, 256}};
- buffer_->Readv(iovecs, 2);
- }
- // The last read only reads the rest 50 bytes in 2nd block.
- EXPECT_EQ(string(50, 'a'), string(dest, 50));
- EXPECT_EQ(0, dest[50]) << "Dest[50] shouln't be filled.";
- EXPECT_EQ(source.size(), buffer_->BytesConsumed());
- EXPECT_TRUE(buffer_->Empty());
- EXPECT_TRUE(helper_->CheckBufferInvariants());
-}
-
-TEST_F(QuicStreamSequencerBufferTest, ClearAfterRead) {
- string source(kBlockSizeBytes + 50, 'a');
- // Write 1st block to full with 'a'.
- size_t written;
- buffer_->OnStreamData(0, source, clock_.ApproximateNow(), &written,
- &error_details_);
- // Read first 512 bytes from buffer to make space at the beginning.
- char dest[512]{0};
- const iovec iov{dest, 512};
- buffer_->Readv(&iov, 1);
- // Clear() should make buffer empty while preserving BytesConsumed()
- buffer_->Clear();
- EXPECT_TRUE(buffer_->Empty());
- EXPECT_TRUE(helper_->CheckBufferInvariants());
-}
-
-TEST_F(QuicStreamSequencerBufferTest,
- OnStreamDataAcrossLastBlockAndFillCapacity) {
- string source(kBlockSizeBytes + 50, 'a');
- // Write 1st block to full with 'a'.
- size_t written;
- buffer_->OnStreamData(0, source, clock_.ApproximateNow(), &written,
- &error_details_);
- // Read first 512 bytes from buffer to make space at the beginning.
- char dest[512]{0};
- const iovec iov{dest, 512};
- buffer_->Readv(&iov, 1);
- EXPECT_EQ(source.size(), written);
-
- // Write more than half block size of bytes in the last block with 'b', which
- // will wrap to the beginning and reaches the full capacity.
- source = string(0.5 * kBlockSizeBytes + 512, 'b');
- EXPECT_EQ(QUIC_NO_ERROR, buffer_->OnStreamData(2 * kBlockSizeBytes, source,
- clock_.ApproximateNow(),
- &written, &error_details_));
- EXPECT_EQ(source.size(), written);
- EXPECT_TRUE(helper_->CheckBufferInvariants());
-}
-
-TEST_F(QuicStreamSequencerBufferTest,
- OnStreamDataAcrossLastBlockAndExceedCapacity) {
- string source(kBlockSizeBytes + 50, 'a');
- // Write 1st block to full.
- size_t written;
- buffer_->OnStreamData(0, source, clock_.ApproximateNow(), &written,
- &error_details_);
- // Read first 512 bytes from buffer to make space at the beginning.
- char dest[512]{0};
- const iovec iov{dest, 512};
- buffer_->Readv(&iov, 1);
-
- // Try to write from [max_capacity_bytes_ - 0.5 * kBlockSizeBytes,
- // max_capacity_bytes_ + 512 + 1). But last bytes exceeds current capacity.
- source = string(0.5 * kBlockSizeBytes + 512 + 1, 'b');
- EXPECT_EQ(QUIC_INTERNAL_ERROR,
- buffer_->OnStreamData(2 * kBlockSizeBytes, source,
- clock_.ApproximateNow(), &written,
- &error_details_));
- EXPECT_TRUE(helper_->CheckBufferInvariants());
-}
-
-TEST_F(QuicStreamSequencerBufferTest, ReadvAcrossLastBlock) {
- // Write to full capacity and read out 512 bytes at beginning and continue
- // appending 256 bytes.
- string source(max_capacity_bytes_, 'a');
- clock_.AdvanceTime(QuicTime::Delta::FromSeconds(1));
- QuicTime t = clock_.ApproximateNow();
- size_t written;
- buffer_->OnStreamData(0, source, t, &written, &error_details_);
- char dest[512]{0};
- const iovec iov{dest, 512};
- buffer_->Readv(&iov, 1);
- source = string(256, 'b');
- clock_.AdvanceTime(QuicTime::Delta::FromSeconds(1));
- QuicTime t2 = clock_.ApproximateNow();
- buffer_->OnStreamData(max_capacity_bytes_, source, t2, &written,
- &error_details_);
- EXPECT_TRUE(helper_->CheckBufferInvariants());
- EXPECT_EQ(2u, helper_->frame_arrival_time_map()->size());
-
- // Read all data out.
- std::unique_ptr<char[]> dest1{new char[max_capacity_bytes_]};
- dest1[0] = 0;
- const iovec iov1{dest1.get(), max_capacity_bytes_};
- EXPECT_EQ(max_capacity_bytes_ - 512 + 256, buffer_->Readv(&iov1, 1));
- EXPECT_EQ(max_capacity_bytes_ + 256, buffer_->BytesConsumed());
- EXPECT_TRUE(buffer_->Empty());
- EXPECT_TRUE(helper_->CheckBufferInvariants());
- EXPECT_EQ(0u, helper_->frame_arrival_time_map()->size());
-}
-
-TEST_F(QuicStreamSequencerBufferTest, ReadvEmpty) {
- char dest[512]{0};
- iovec iov{dest, 512};
- size_t read = buffer_->Readv(&iov, 1);
- EXPECT_EQ(0u, read);
- EXPECT_TRUE(helper_->CheckBufferInvariants());
-}
-
-TEST_F(QuicStreamSequencerBufferTest, GetReadableRegionsEmpty) {
- iovec iovs[2];
- int iov_count = buffer_->GetReadableRegions(iovs, 2);
- EXPECT_EQ(0, iov_count);
- EXPECT_EQ(nullptr, iovs[iov_count].iov_base);
- EXPECT_EQ(0u, iovs[iov_count].iov_len);
-}
-
-TEST_F(QuicStreamSequencerBufferTest, GetReadableRegionsBlockedByGap) {
- // Write into [1, 1024).
- string source(1023, 'a');
- size_t written;
- buffer_->OnStreamData(1, source, clock_.ApproximateNow(), &written,
- &error_details_);
- // Try to get readable regions, but none is there.
- iovec iovs[2];
- int iov_count = buffer_->GetReadableRegions(iovs, 2);
- EXPECT_EQ(0, iov_count);
-}
-
-TEST_F(QuicStreamSequencerBufferTest, GetReadableRegionsTillEndOfBlock) {
- // Write first block to full with [0, 256) 'a' and the rest 'b' then read out
- // [0, 256)
- string source(kBlockSizeBytes, 'a');
- size_t written;
- buffer_->OnStreamData(0, source, clock_.ApproximateNow(), &written,
- &error_details_);
- char dest[256];
- helper_->Read(dest, 256);
- // Get readable region from [256, 1024)
- iovec iovs[2];
- int iov_count = buffer_->GetReadableRegions(iovs, 2);
- EXPECT_EQ(1, iov_count);
- EXPECT_EQ(
- string(kBlockSizeBytes - 256, 'a'),
- string(reinterpret_cast<const char*>(iovs[0].iov_base), iovs[0].iov_len));
-}
-
-TEST_F(QuicStreamSequencerBufferTest, GetReadableRegionsWithinOneBlock) {
- // Write into [0, 1024) and then read out [0, 256)
- string source(1024, 'a');
- size_t written;
- buffer_->OnStreamData(0, source, clock_.ApproximateNow(), &written,
- &error_details_);
- char dest[256];
- helper_->Read(dest, 256);
- // Get readable region from [256, 1024)
- iovec iovs[2];
- int iov_count = buffer_->GetReadableRegions(iovs, 2);
- EXPECT_EQ(1, iov_count);
- EXPECT_EQ(
- string(1024 - 256, 'a'),
- string(reinterpret_cast<const char*>(iovs[0].iov_base), iovs[0].iov_len));
-}
-
-TEST_F(QuicStreamSequencerBufferTest,
- GetReadableRegionsAcrossBlockWithLongIOV) {
- // Write into [0, 2 * kBlockSizeBytes + 1024) and then read out [0, 1024)
- string source(2 * kBlockSizeBytes + 1024, 'a');
- size_t written;
- buffer_->OnStreamData(0, source, clock_.ApproximateNow(), &written,
- &error_details_);
- char dest[1024];
- helper_->Read(dest, 1024);
-
- iovec iovs[4];
- int iov_count = buffer_->GetReadableRegions(iovs, 4);
- EXPECT_EQ(3, iov_count);
- EXPECT_EQ(kBlockSizeBytes - 1024, iovs[0].iov_len);
- EXPECT_EQ(kBlockSizeBytes, iovs[1].iov_len);
- EXPECT_EQ(1024u, iovs[2].iov_len);
-}
-
-TEST_F(QuicStreamSequencerBufferTest,
- GetReadableRegionsWithMultipleIOVsAcrossEnd) {
- // Write into [0, 2 * kBlockSizeBytes + 1024) and then read out [0, 1024)
- // and then append 1024 + 512 bytes.
- string source(2.5 * kBlockSizeBytes - 1024, 'a');
- size_t written;
- buffer_->OnStreamData(0, source, clock_.ApproximateNow(), &written,
- &error_details_);
- char dest[1024];
- helper_->Read(dest, 1024);
- // Write across the end.
- source = string(1024 + 512, 'b');
- buffer_->OnStreamData(2.5 * kBlockSizeBytes - 1024, source,
- clock_.ApproximateNow(), &written, &error_details_);
- // Use short iovec's.
- iovec iovs[2];
- int iov_count = buffer_->GetReadableRegions(iovs, 2);
- EXPECT_EQ(2, iov_count);
- EXPECT_EQ(kBlockSizeBytes - 1024, iovs[0].iov_len);
- EXPECT_EQ(kBlockSizeBytes, iovs[1].iov_len);
- // Use long iovec's and wrap the end of buffer.
- iovec iovs1[5];
- EXPECT_EQ(4, buffer_->GetReadableRegions(iovs1, 5));
- EXPECT_EQ(0.5 * kBlockSizeBytes, iovs1[2].iov_len);
- EXPECT_EQ(512u, iovs1[3].iov_len);
- EXPECT_EQ(string(512, 'b'),
- string(reinterpret_cast<const char*>(iovs1[3].iov_base),
- iovs1[3].iov_len));
-}
-
-TEST_F(QuicStreamSequencerBufferTest, GetReadableRegionEmpty) {
- iovec iov;
- QuicTime t = QuicTime::Zero();
- EXPECT_FALSE(buffer_->GetReadableRegion(&iov, &t));
- EXPECT_EQ(nullptr, iov.iov_base);
- EXPECT_EQ(0u, iov.iov_len);
-}
-
-TEST_F(QuicStreamSequencerBufferTest, GetReadableRegionBeforeGap) {
- // Write into [1, 1024).
- string source(1023, 'a');
- size_t written;
- buffer_->OnStreamData(1, source, clock_.ApproximateNow(), &written,
- &error_details_);
- // GetReadableRegion should return false because range [0,1) hasn't been
- // filled yet.
- iovec iov;
- QuicTime t = QuicTime::Zero();
- EXPECT_FALSE(buffer_->GetReadableRegion(&iov, &t));
-}
-
-TEST_F(QuicStreamSequencerBufferTest, GetReadableRegionTillEndOfBlock) {
- // Write into [0, kBlockSizeBytes + 1) and then read out [0, 256)
- string source(kBlockSizeBytes + 1, 'a');
- size_t written;
- clock_.AdvanceTime(QuicTime::Delta::FromSeconds(1));
- QuicTime t = clock_.ApproximateNow();
- buffer_->OnStreamData(0, source, t, &written, &error_details_);
- char dest[256];
- helper_->Read(dest, 256);
- // Get readable region from [256, 1024)
- iovec iov;
- QuicTime t2 = QuicTime::Zero();
- EXPECT_TRUE(buffer_->GetReadableRegion(&iov, &t2));
- EXPECT_EQ(t, t2);
- EXPECT_EQ(string(kBlockSizeBytes - 256, 'a'),
- string(reinterpret_cast<const char*>(iov.iov_base), iov.iov_len));
-}
-
-TEST_F(QuicStreamSequencerBufferTest, GetReadableRegionTillGap) {
- // Write into [0, kBlockSizeBytes - 1) and then read out [0, 256)
- string source(kBlockSizeBytes - 1, 'a');
- size_t written;
- clock_.AdvanceTime(QuicTime::Delta::FromSeconds(1));
- QuicTime t = clock_.ApproximateNow();
- buffer_->OnStreamData(0, source, t, &written, &error_details_);
- char dest[256];
- helper_->Read(dest, 256);
- // Get readable region from [256, 1023)
- iovec iov;
- QuicTime t2 = QuicTime::Zero();
- EXPECT_TRUE(buffer_->GetReadableRegion(&iov, &t2));
- EXPECT_EQ(t, t2);
- EXPECT_EQ(string(kBlockSizeBytes - 1 - 256, 'a'),
- string(reinterpret_cast<const char*>(iov.iov_base), iov.iov_len));
-}
-
-TEST_F(QuicStreamSequencerBufferTest, GetReadableRegionByArrivalTime) {
- // Write into [0, kBlockSizeBytes - 100) and then read out [0, 256)
- string source(kBlockSizeBytes - 100, 'a');
- size_t written;
- clock_.AdvanceTime(QuicTime::Delta::FromSeconds(1));
- QuicTime t = clock_.ApproximateNow();
- buffer_->OnStreamData(0, source, t, &written, &error_details_);
- char dest[256];
- helper_->Read(dest, 256);
- // Write into [kBlockSizeBytes - 100, kBlockSizeBytes - 50)] in same time
- string source2(50, 'b');
- clock_.AdvanceTime(QuicTime::Delta::FromSeconds(1));
- buffer_->OnStreamData(kBlockSizeBytes - 100, source2, t, &written,
- &error_details_);
-
- // Write into [kBlockSizeBytes - 50, kBlockSizeBytes)] in another time
- string source3(50, 'c');
- clock_.AdvanceTime(QuicTime::Delta::FromSeconds(1));
- QuicTime t3 = clock_.ApproximateNow();
- buffer_->OnStreamData(kBlockSizeBytes - 50, source3, t3, &written,
- &error_details_);
-
- // Get readable region from [256, 1024 - 50)
- iovec iov;
- QuicTime t4 = QuicTime::Zero();
- EXPECT_TRUE(buffer_->GetReadableRegion(&iov, &t4));
- EXPECT_EQ(t, t4);
- EXPECT_EQ(string(kBlockSizeBytes - 100 - 256, 'a') + source2,
- string(reinterpret_cast<const char*>(iov.iov_base), iov.iov_len));
-}
-
-TEST_F(QuicStreamSequencerBufferTest, MarkConsumedInOneBlock) {
- // Write into [0, 1024) and then read out [0, 256)
- string source(1024, 'a');
- size_t written;
- buffer_->OnStreamData(0, source, clock_.ApproximateNow(), &written,
- &error_details_);
- char dest[256];
- helper_->Read(dest, 256);
-
- EXPECT_TRUE(buffer_->MarkConsumed(512));
- EXPECT_EQ(256u + 512u, buffer_->BytesConsumed());
- EXPECT_EQ(256u, helper_->ReadableBytes());
- EXPECT_EQ(1u, helper_->frame_arrival_time_map()->size());
- buffer_->MarkConsumed(256);
- EXPECT_EQ(0u, helper_->frame_arrival_time_map()->size());
- EXPECT_TRUE(buffer_->Empty());
- EXPECT_TRUE(helper_->CheckBufferInvariants());
-}
-
-TEST_F(QuicStreamSequencerBufferTest, MarkConsumedNotEnoughBytes) {
- // Write into [0, 1024) and then read out [0, 256)
- string source(1024, 'a');
- size_t written;
- QuicTime t = clock_.ApproximateNow();
- buffer_->OnStreamData(0, source, t, &written, &error_details_);
- char dest[256];
- helper_->Read(dest, 256);
-
- // Consume 1st 512 bytes
- EXPECT_TRUE(buffer_->MarkConsumed(512));
- EXPECT_EQ(256u + 512u, buffer_->BytesConsumed());
- EXPECT_EQ(256u, helper_->ReadableBytes());
- // Try to consume one bytes more than available. Should return false.
- EXPECT_FALSE(buffer_->MarkConsumed(257));
- EXPECT_EQ(256u + 512u, buffer_->BytesConsumed());
- QuicTime t2 = QuicTime::Zero();
- iovec iov;
- EXPECT_TRUE(buffer_->GetReadableRegion(&iov, &t2));
- EXPECT_EQ(t, t2);
- EXPECT_TRUE(helper_->CheckBufferInvariants());
-}
-
-TEST_F(QuicStreamSequencerBufferTest, MarkConsumedAcrossBlock) {
- // Write into [0, 2 * kBlockSizeBytes + 1024) and then read out [0, 1024)
- string source(2 * kBlockSizeBytes + 1024, 'a');
- size_t written;
- buffer_->OnStreamData(0, source, clock_.ApproximateNow(), &written,
- &error_details_);
- char dest[1024];
- helper_->Read(dest, 1024);
-
- buffer_->MarkConsumed(2 * kBlockSizeBytes);
- EXPECT_EQ(source.size(), buffer_->BytesConsumed());
- EXPECT_TRUE(buffer_->Empty());
- EXPECT_TRUE(helper_->CheckBufferInvariants());
-}
-
-TEST_F(QuicStreamSequencerBufferTest, MarkConsumedAcrossEnd) {
- // Write into [0, 2.5 * kBlockSizeBytes - 1024) and then read out [0, 1024)
- // and then append 1024 + 512 bytes.
- string source(2.5 * kBlockSizeBytes - 1024, 'a');
- size_t written;
- buffer_->OnStreamData(0, source, clock_.ApproximateNow(), &written,
- &error_details_);
- char dest[1024];
- helper_->Read(dest, 1024);
- source = string(1024 + 512, 'b');
- buffer_->OnStreamData(2.5 * kBlockSizeBytes - 1024, source,
- clock_.ApproximateNow(), &written, &error_details_);
- EXPECT_EQ(1024u, buffer_->BytesConsumed());
-
- // Consume to the end of 2nd block.
- buffer_->MarkConsumed(2 * kBlockSizeBytes - 1024);
- EXPECT_EQ(2 * kBlockSizeBytes, buffer_->BytesConsumed());
- // Consume across the physical end of buffer
- buffer_->MarkConsumed(0.5 * kBlockSizeBytes + 500);
- EXPECT_EQ(max_capacity_bytes_ + 500, buffer_->BytesConsumed());
- EXPECT_EQ(12u, helper_->ReadableBytes());
- // Consume to the logical end of buffer
- buffer_->MarkConsumed(12);
- EXPECT_EQ(max_capacity_bytes_ + 512, buffer_->BytesConsumed());
- EXPECT_TRUE(buffer_->Empty());
- EXPECT_TRUE(helper_->CheckBufferInvariants());
-}
-
-TEST_F(QuicStreamSequencerBufferTest, FlushBufferedFrames) {
- // Write into [0, 2.5 * kBlockSizeBytes - 1024) and then read out [0, 1024).
- string source(max_capacity_bytes_ - 1024, 'a');
- size_t written;
- buffer_->OnStreamData(0, source, clock_.ApproximateNow(), &written,
- &error_details_);
- char dest[1024];
- helper_->Read(dest, 1024);
- EXPECT_EQ(1024u, buffer_->BytesConsumed());
- // Write [1024, 512) to the physical beginning.
- source = string(512, 'b');
- buffer_->OnStreamData(max_capacity_bytes_, source, clock_.ApproximateNow(),
- &written, &error_details_);
- EXPECT_EQ(512u, written);
- EXPECT_EQ(max_capacity_bytes_ - 1024 + 512, buffer_->FlushBufferedFrames());
- EXPECT_EQ(max_capacity_bytes_ + 512, buffer_->BytesConsumed());
- EXPECT_TRUE(buffer_->Empty());
- EXPECT_TRUE(helper_->CheckBufferInvariants());
- // Clear buffer at this point should still preserve BytesConsumed().
- buffer_->Clear();
- EXPECT_EQ(max_capacity_bytes_ + 512, buffer_->BytesConsumed());
- EXPECT_TRUE(helper_->CheckBufferInvariants());
-}
-
-class QuicStreamSequencerBufferRandomIOTest
- : public QuicStreamSequencerBufferTest {
- public:
- typedef std::pair<QuicStreamOffset, size_t> OffsetSizePair;
-
- void SetUp() override {
- // Test against a larger capacity then above tests. Also make sure the last
- // block is partially available to use.
- max_capacity_bytes_ = 6.25 * kBlockSizeBytes;
- // Stream to be buffered should be larger than the capacity to test wrap
- // around.
- bytes_to_buffer_ = 2 * max_capacity_bytes_;
- Initialize();
-
- uint32_t seed = base::RandInt(0, std::numeric_limits<int32_t>::max());
- LOG(INFO) << "RandomWriteAndProcessInPlace test seed is " << seed;
- rng_.set_seed(seed);
- }
-
- // Create an out-of-order source stream with given size to populate
- // shuffled_buf_.
- void CreateSourceAndShuffle(size_t max_chunk_size_bytes) {
- max_chunk_size_bytes_ = max_chunk_size_bytes;
- std::unique_ptr<OffsetSizePair[]> chopped_stream(
- new OffsetSizePair[bytes_to_buffer_]);
-
- // Split stream into small chunks with random length. chopped_stream will be
- // populated with segmented stream chunks.
- size_t start_chopping_offset = 0;
- size_t iterations = 0;
- while (start_chopping_offset < bytes_to_buffer_) {
- size_t max_chunk = min<size_t>(max_chunk_size_bytes_,
- bytes_to_buffer_ - start_chopping_offset);
- size_t chunk_size = rng_.RandUint64() % max_chunk + 1;
- chopped_stream[iterations] =
- OffsetSizePair(start_chopping_offset, chunk_size);
- start_chopping_offset += chunk_size;
- ++iterations;
- }
- DCHECK(start_chopping_offset == bytes_to_buffer_);
- size_t chunk_num = iterations;
-
- // Randomly change the sequence of in-ordered OffsetSizePairs to make a
- // out-of-order array of OffsetSizePairs.
- for (int i = chunk_num - 1; i >= 0; --i) {
- size_t random_idx = rng_.RandUint64() % (i + 1);
- DVLOG(1) << "chunk offset " << chopped_stream[random_idx].first
- << " size " << chopped_stream[random_idx].second;
- shuffled_buf_.push_front(chopped_stream[random_idx]);
- chopped_stream[random_idx] = chopped_stream[i];
- }
- }
-
- // Write the currently first chunk of data in the out-of-order stream into
- // QuicStreamSequencerBuffer. If current chuck cannot be written into buffer
- // because it goes beyond current capacity, move it to the end of
- // shuffled_buf_ and write it later.
- void WriteNextChunkToBuffer() {
- OffsetSizePair& chunk = shuffled_buf_.front();
- QuicStreamOffset offset = chunk.first;
- const size_t num_to_write = chunk.second;
- std::unique_ptr<char[]> write_buf{new char[max_chunk_size_bytes_]};
- for (size_t i = 0; i < num_to_write; ++i) {
- write_buf[i] = (offset + i) % 256;
- }
- base::StringPiece string_piece_w(write_buf.get(), num_to_write);
- size_t written;
- auto result =
- buffer_->OnStreamData(offset, string_piece_w, clock_.ApproximateNow(),
- &written, &error_details_);
- if (result == QUIC_NO_ERROR) {
- shuffled_buf_.pop_front();
- total_bytes_written_ += num_to_write;
- } else {
- // This chunk offset exceeds window size.
- shuffled_buf_.push_back(chunk);
- shuffled_buf_.pop_front();
- }
- DVLOG(1) << " write at offset: " << offset
- << " len to write: " << num_to_write << " write result: " << result
- << " left over: " << shuffled_buf_.size();
- }
-
- protected:
- std::list<OffsetSizePair> shuffled_buf_;
- size_t max_chunk_size_bytes_;
- QuicStreamOffset bytes_to_buffer_;
- size_t total_bytes_written_ = 0;
- size_t total_bytes_read_ = 0;
- SimpleRandom rng_;
-};
-
-TEST_F(QuicStreamSequencerBufferRandomIOTest, RandomWriteAndReadv) {
- // Set kMaxReadSize larger than kBlockSizeBytes to test both small and large
- // read.
- const size_t kMaxReadSize = kBlockSizeBytes * 2;
- // kNumReads is larger than 1 to test how multiple read destinations work.
- const size_t kNumReads = 2;
- // Since write and read operation have equal possibility to be called. Bytes
- // to be written into and read out of should roughly the same.
- const size_t kMaxWriteSize = kNumReads * kMaxReadSize;
- size_t iterations = 0;
-
- CreateSourceAndShuffle(kMaxWriteSize);
-
- while ((!shuffled_buf_.empty() || total_bytes_read_ < bytes_to_buffer_) &&
- iterations <= 2 * bytes_to_buffer_) {
- uint8_t next_action =
- shuffled_buf_.empty() ? uint8_t{1} : rng_.RandUint64() % 2;
- DVLOG(1) << "iteration: " << iterations;
- switch (next_action) {
- case 0: { // write
- WriteNextChunkToBuffer();
- ASSERT_TRUE(helper_->CheckBufferInvariants());
- break;
- }
- case 1: { // readv
- std::unique_ptr<char[][kMaxReadSize]> read_buf{
- new char[kNumReads][kMaxReadSize]};
- iovec dest_iov[kNumReads];
- size_t num_to_read = 0;
- for (size_t i = 0; i < kNumReads; ++i) {
- dest_iov[i].iov_base =
- reinterpret_cast<void*>(const_cast<char*>(read_buf[i]));
- dest_iov[i].iov_len = rng_.RandUint64() % kMaxReadSize;
- num_to_read += dest_iov[i].iov_len;
- }
- size_t actually_read = buffer_->Readv(dest_iov, kNumReads);
- ASSERT_LE(actually_read, num_to_read);
- DVLOG(1) << " read from offset: " << total_bytes_read_
- << " size: " << num_to_read
- << " actual read: " << actually_read;
- for (size_t i = 0; i < actually_read; ++i) {
- char ch = (i + total_bytes_read_) % 256;
- ASSERT_EQ(ch, GetCharFromIOVecs(i, dest_iov, kNumReads))
- << " at iteration " << iterations;
- }
- total_bytes_read_ += actually_read;
- ASSERT_EQ(total_bytes_read_, buffer_->BytesConsumed());
- ASSERT_TRUE(helper_->CheckBufferInvariants());
- break;
- }
- }
- ++iterations;
- ASSERT_LE(total_bytes_read_, total_bytes_written_);
- }
- EXPECT_LT(iterations, bytes_to_buffer_) << "runaway test";
- EXPECT_LE(bytes_to_buffer_, total_bytes_read_) << "iterations: "
- << iterations;
- EXPECT_LE(bytes_to_buffer_, total_bytes_written_);
-}
-
-TEST_F(QuicStreamSequencerBufferRandomIOTest, RandomWriteAndConsumeInPlace) {
- // The value 4 is chosen such that the max write size is no larger than the
- // maximum buffer capacity.
- const size_t kMaxNumReads = 4;
- // Adjust write amount be roughly equal to that GetReadableRegions() can get.
- const size_t kMaxWriteSize = kMaxNumReads * kBlockSizeBytes;
- ASSERT_LE(kMaxWriteSize, max_capacity_bytes_);
- size_t iterations = 0;
-
- CreateSourceAndShuffle(kMaxWriteSize);
-
- while ((!shuffled_buf_.empty() || total_bytes_read_ < bytes_to_buffer_) &&
- iterations <= 2 * bytes_to_buffer_) {
- uint8_t next_action =
- shuffled_buf_.empty() ? uint8_t{1} : rng_.RandUint64() % 2;
- DVLOG(1) << "iteration: " << iterations;
- switch (next_action) {
- case 0: { // write
- WriteNextChunkToBuffer();
- ASSERT_TRUE(helper_->CheckBufferInvariants());
- break;
- }
- case 1: { // GetReadableRegions and then MarkConsumed
- size_t num_read = rng_.RandUint64() % kMaxNumReads + 1;
- iovec dest_iov[kMaxNumReads];
- ASSERT_TRUE(helper_->CheckBufferInvariants());
- size_t actually_num_read =
- buffer_->GetReadableRegions(dest_iov, num_read);
- ASSERT_LE(actually_num_read, num_read);
- size_t avail_bytes = 0;
- for (size_t i = 0; i < actually_num_read; ++i) {
- avail_bytes += dest_iov[i].iov_len;
- }
- // process random number of bytes (check the value of each byte).
- size_t bytes_to_process = rng_.RandUint64() % (avail_bytes + 1);
- size_t bytes_processed = 0;
- for (size_t i = 0; i < actually_num_read; ++i) {
- size_t bytes_in_block = min<size_t>(
- bytes_to_process - bytes_processed, dest_iov[i].iov_len);
- if (bytes_in_block == 0) {
- break;
- }
- for (size_t j = 0; j < bytes_in_block; ++j) {
- ASSERT_LE(bytes_processed, bytes_to_process);
- char char_expected =
- (buffer_->BytesConsumed() + bytes_processed) % 256;
- ASSERT_EQ(char_expected,
- reinterpret_cast<const char*>(dest_iov[i].iov_base)[j])
- << " at iteration " << iterations;
- ++bytes_processed;
- }
- }
-
- buffer_->MarkConsumed(bytes_processed);
-
- DVLOG(1) << "iteration " << iterations << ": try to get " << num_read
- << " readable regions, actually get " << actually_num_read
- << " from offset: " << total_bytes_read_
- << "\nprocesse bytes: " << bytes_processed;
- total_bytes_read_ += bytes_processed;
- ASSERT_EQ(total_bytes_read_, buffer_->BytesConsumed());
- ASSERT_TRUE(helper_->CheckBufferInvariants());
- break;
- }
- }
- ++iterations;
- ASSERT_LE(total_bytes_read_, total_bytes_written_);
- }
- EXPECT_LT(iterations, bytes_to_buffer_) << "runaway test";
- EXPECT_LE(bytes_to_buffer_, total_bytes_read_) << "iterations: "
- << iterations;
- EXPECT_LE(bytes_to_buffer_, total_bytes_written_);
-}
-
-} // anonymous namespace
-
-} // namespace test
-
-} // namespace net
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