Move shared files in net/quic/ into net/quic/core/

net/quic/quic_received_packet_manager_test.cc

-// Copyright 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/quic/quic_received_packet_manager.h"
-
-#include <algorithm>
-#include <vector>
-
-#include "net/quic/quic_connection_stats.h"
-#include "net/quic/quic_flags.h"
-#include "net/quic/test_tools/quic_received_packet_manager_peer.h"
-#include "testing/gmock/include/gmock/gmock.h"
-#include "testing/gtest/include/gtest/gtest.h"
-
-using std::pair;
-using std::vector;
-
-namespace net {
-namespace test {
-
-class EntropyTrackerPeer {
- public:
-  static QuicPacketNumber first_gap(
-      const QuicReceivedPacketManager::EntropyTracker& tracker) {
-    return tracker.first_gap_;
-  }
-  static QuicPacketNumber largest_observed(
-      const QuicReceivedPacketManager::EntropyTracker& tracker) {
-    return tracker.largest_observed_;
-  }
-  static int packets_entropy_size(
-      const QuicReceivedPacketManager::EntropyTracker& tracker) {
-    return tracker.packets_entropy_.size();
-  }
-  static bool IsTrackingPacket(
-      const QuicReceivedPacketManager::EntropyTracker& tracker,
-      QuicPacketNumber packet_number) {
-    return packet_number >= tracker.first_gap_ &&
-           packet_number <
-               (tracker.first_gap_ + tracker.packets_entropy_.size()) &&
-           tracker.packets_entropy_[packet_number - tracker.first_gap_].second;
-  }
-};
-
-namespace {
-
-// Entropy of individual packets is not tracked if there are no gaps.
-TEST(EntropyTrackerTest, NoGaps) {
-  QuicReceivedPacketManager::EntropyTracker tracker;
-
-  tracker.RecordPacketEntropyHash(1, 23);
-  tracker.RecordPacketEntropyHash(2, 42);
-
-  EXPECT_EQ(23 ^ 42, tracker.EntropyHash(2));
-  EXPECT_EQ(3u, EntropyTrackerPeer::first_gap(tracker));
-
-  EXPECT_EQ(2u, EntropyTrackerPeer::largest_observed(tracker));
-  EXPECT_EQ(0, EntropyTrackerPeer::packets_entropy_size(tracker));
-  EXPECT_FALSE(EntropyTrackerPeer::IsTrackingPacket(tracker, 1));
-  EXPECT_FALSE(EntropyTrackerPeer::IsTrackingPacket(tracker, 2));
-}
-
-// Entropy of individual packets is tracked as long as there are gaps.
-// Filling the first gap results in entropy getting garbage collected.
-TEST(EntropyTrackerTest, FillGaps) {
-  QuicReceivedPacketManager::EntropyTracker tracker;
-
-  tracker.RecordPacketEntropyHash(2, 5);
-  tracker.RecordPacketEntropyHash(5, 17);
-  tracker.RecordPacketEntropyHash(6, 23);
-  tracker.RecordPacketEntropyHash(9, 42);
-
-  EXPECT_EQ(1u, EntropyTrackerPeer::first_gap(tracker));
-  EXPECT_EQ(9u, EntropyTrackerPeer::largest_observed(tracker));
-  EXPECT_EQ(9, EntropyTrackerPeer::packets_entropy_size(tracker));
-
-  EXPECT_EQ(5, tracker.EntropyHash(2));
-  EXPECT_EQ(5 ^ 17, tracker.EntropyHash(5));
-  EXPECT_EQ(5 ^ 17 ^ 23, tracker.EntropyHash(6));
-  EXPECT_EQ(5 ^ 17 ^ 23 ^ 42, tracker.EntropyHash(9));
-
-  EXPECT_FALSE(EntropyTrackerPeer::IsTrackingPacket(tracker, 1));
-  EXPECT_TRUE(EntropyTrackerPeer::IsTrackingPacket(tracker, 2));
-  EXPECT_TRUE(EntropyTrackerPeer::IsTrackingPacket(tracker, 5));
-  EXPECT_TRUE(EntropyTrackerPeer::IsTrackingPacket(tracker, 6));
-  EXPECT_TRUE(EntropyTrackerPeer::IsTrackingPacket(tracker, 9));
-
-  // Fill the gap at 1.
-  tracker.RecordPacketEntropyHash(1, 2);
-
-  EXPECT_EQ(3u, EntropyTrackerPeer::first_gap(tracker));
-  EXPECT_EQ(9u, EntropyTrackerPeer::largest_observed(tracker));
-  EXPECT_EQ(7, EntropyTrackerPeer::packets_entropy_size(tracker));
-
-  EXPECT_EQ(2 ^ 5 ^ 17, tracker.EntropyHash(5));
-  EXPECT_EQ(2 ^ 5 ^ 17 ^ 23, tracker.EntropyHash(6));
-  EXPECT_EQ(2 ^ 5 ^ 17 ^ 23 ^ 42, tracker.EntropyHash(9));
-
-  EXPECT_FALSE(EntropyTrackerPeer::IsTrackingPacket(tracker, 1));
-  EXPECT_FALSE(EntropyTrackerPeer::IsTrackingPacket(tracker, 2));
-  EXPECT_TRUE(EntropyTrackerPeer::IsTrackingPacket(tracker, 5));
-  EXPECT_TRUE(EntropyTrackerPeer::IsTrackingPacket(tracker, 6));
-  EXPECT_TRUE(EntropyTrackerPeer::IsTrackingPacket(tracker, 9));
-
-  // Fill the gap at 4.
-  tracker.RecordPacketEntropyHash(4, 2);
-
-  EXPECT_EQ(3u, EntropyTrackerPeer::first_gap(tracker));
-  EXPECT_EQ(9u, EntropyTrackerPeer::largest_observed(tracker));
-  EXPECT_EQ(7, EntropyTrackerPeer::packets_entropy_size(tracker));
-
-  EXPECT_EQ(5, tracker.EntropyHash(4));
-  EXPECT_EQ(5 ^ 17, tracker.EntropyHash(5));
-  EXPECT_EQ(5 ^ 17 ^ 23, tracker.EntropyHash(6));
-  EXPECT_EQ(5 ^ 17 ^ 23 ^ 42, tracker.EntropyHash(9));
-
-  EXPECT_FALSE(EntropyTrackerPeer::IsTrackingPacket(tracker, 3));
-  EXPECT_TRUE(EntropyTrackerPeer::IsTrackingPacket(tracker, 4));
-  EXPECT_TRUE(EntropyTrackerPeer::IsTrackingPacket(tracker, 5));
-  EXPECT_TRUE(EntropyTrackerPeer::IsTrackingPacket(tracker, 6));
-  EXPECT_TRUE(EntropyTrackerPeer::IsTrackingPacket(tracker, 9));
-
-  // Fill the gap at 3.  Entropy for packets 3 to 6 are forgotten.
-  tracker.RecordPacketEntropyHash(3, 2);
-
-  EXPECT_EQ(7u, EntropyTrackerPeer::first_gap(tracker));
-  EXPECT_EQ(9u, EntropyTrackerPeer::largest_observed(tracker));
-  EXPECT_EQ(3, EntropyTrackerPeer::packets_entropy_size(tracker));
-
-  EXPECT_EQ(2 ^ 5 ^ 17 ^ 23 ^ 42, tracker.EntropyHash(9));
-
-  EXPECT_FALSE(EntropyTrackerPeer::IsTrackingPacket(tracker, 3));
-  EXPECT_FALSE(EntropyTrackerPeer::IsTrackingPacket(tracker, 4));
-  EXPECT_FALSE(EntropyTrackerPeer::IsTrackingPacket(tracker, 5));
-  EXPECT_FALSE(EntropyTrackerPeer::IsTrackingPacket(tracker, 6));
-  EXPECT_TRUE(EntropyTrackerPeer::IsTrackingPacket(tracker, 9));
-
-  // Fill in the rest.
-  tracker.RecordPacketEntropyHash(7, 2);
-  tracker.RecordPacketEntropyHash(8, 2);
-
-  EXPECT_EQ(10u, EntropyTrackerPeer::first_gap(tracker));
-  EXPECT_EQ(9u, EntropyTrackerPeer::largest_observed(tracker));
-  EXPECT_EQ(0, EntropyTrackerPeer::packets_entropy_size(tracker));
-
-  EXPECT_EQ(2 ^ 5 ^ 17 ^ 23 ^ 42, tracker.EntropyHash(9));
-}
-
-TEST(EntropyTrackerTest, SetCumulativeEntropyUpTo) {
-  QuicReceivedPacketManager::EntropyTracker tracker;
-
-  tracker.RecordPacketEntropyHash(2, 5);
-  tracker.RecordPacketEntropyHash(5, 17);
-  tracker.RecordPacketEntropyHash(6, 23);
-  tracker.RecordPacketEntropyHash(9, 42);
-
-  EXPECT_EQ(1u, EntropyTrackerPeer::first_gap(tracker));
-  EXPECT_EQ(9u, EntropyTrackerPeer::largest_observed(tracker));
-  EXPECT_EQ(9, EntropyTrackerPeer::packets_entropy_size(tracker));
-
-  // Inform the tracker about value of the hash at a gap.
-  tracker.SetCumulativeEntropyUpTo(3, 7);
-  EXPECT_EQ(3u, EntropyTrackerPeer::first_gap(tracker));
-  EXPECT_EQ(9u, EntropyTrackerPeer::largest_observed(tracker));
-  EXPECT_EQ(7, EntropyTrackerPeer::packets_entropy_size(tracker));
-
-  EXPECT_EQ(7 ^ 17, tracker.EntropyHash(5));
-  EXPECT_EQ(7 ^ 17 ^ 23, tracker.EntropyHash(6));
-  EXPECT_EQ(7 ^ 17 ^ 23 ^ 42, tracker.EntropyHash(9));
-
-  // Inform the tracker about value of the hash at a known location.
-  tracker.SetCumulativeEntropyUpTo(6, 1);
-  EXPECT_EQ(7u, EntropyTrackerPeer::first_gap(tracker));
-  EXPECT_EQ(9u, EntropyTrackerPeer::largest_observed(tracker));
-  EXPECT_EQ(3, EntropyTrackerPeer::packets_entropy_size(tracker));
-
-  EXPECT_EQ(1 ^ 23 ^ 42, tracker.EntropyHash(9));
-
-  // Inform the tracker about value of the hash at the last location.
-  tracker.SetCumulativeEntropyUpTo(9, 21);
-  EXPECT_EQ(10u, EntropyTrackerPeer::first_gap(tracker));
-  EXPECT_EQ(9u, EntropyTrackerPeer::largest_observed(tracker));
-  EXPECT_EQ(0, EntropyTrackerPeer::packets_entropy_size(tracker));
-
-  EXPECT_EQ(42 ^ 21, tracker.EntropyHash(9));
-}
-
-struct TestParams {
-  explicit TestParams(QuicVersion version) : version(version) {}
-
-  friend std::ostream& operator<<(std::ostream& os, const TestParams& p) {
-    os << "{ version: " << QuicVersionToString(p.version) << " }";
-    return os;
-  }
-
-  QuicVersion version;
-};
-
-vector<TestParams> GetTestParams() {
-  vector<TestParams> params;
-  QuicVersionVector all_supported_versions = QuicSupportedVersions();
-  for (size_t i = 0; i < all_supported_versions.size(); ++i) {
-    params.push_back(TestParams(all_supported_versions[i]));
-  }
-  return params;
-}
-
-class QuicReceivedPacketManagerTest
-    : public ::testing::TestWithParam<TestParams> {
- protected:
-  QuicReceivedPacketManagerTest() : received_manager_(&stats_) {
-    received_manager_.SetVersion(GetParam().version);
-  }
-
-  void RecordPacketReceipt(QuicPacketNumber packet_number,
-                           QuicPacketEntropyHash entropy_hash) {
-    RecordPacketReceipt(packet_number, entropy_hash, QuicTime::Zero());
-  }
-
-  void RecordPacketReceipt(QuicPacketNumber packet_number,
-                           QuicPacketEntropyHash entropy_hash,
-                           QuicTime receipt_time) {
-    QuicPacketHeader header;
-    header.packet_number = packet_number;
-    header.entropy_hash = entropy_hash;
-    received_manager_.RecordPacketReceived(0u, header, receipt_time);
-  }
-
-  QuicConnectionStats stats_;
-  QuicReceivedPacketManager received_manager_;
-};
-
-INSTANTIATE_TEST_CASE_P(QuicReceivedPacketManagerTest,
-                        QuicReceivedPacketManagerTest,
-                        ::testing::ValuesIn(GetTestParams()));
-
-TEST_P(QuicReceivedPacketManagerTest, ReceivedPacketEntropyHash) {
-  if (GetParam().version > QUIC_VERSION_33) {
-    return;
-  }
-  vector<pair<QuicPacketNumber, QuicPacketEntropyHash>> entropies;
-  entropies.push_back(std::make_pair(1, 12));
-  entropies.push_back(std::make_pair(7, 1));
-  entropies.push_back(std::make_pair(2, 33));
-  entropies.push_back(std::make_pair(5, 3));
-  entropies.push_back(std::make_pair(8, 34));
-
-  for (size_t i = 0; i < entropies.size(); ++i) {
-    RecordPacketReceipt(entropies[i].first, entropies[i].second);
-  }
-
-  std::sort(entropies.begin(), entropies.end());
-
-  QuicPacketEntropyHash hash = 0;
-  size_t index = 0;
-  for (size_t i = 1; i <= (*entropies.rbegin()).first; ++i) {
-    if (entropies[index].first == i) {
-      hash ^= entropies[index].second;
-      ++index;
-    }
-    if (i < 3)
-      continue;
-    EXPECT_EQ(hash, received_manager_.EntropyHash(i));
-  }
-  // Reorder by 5 when 2 is received after 7.
-  EXPECT_EQ(5u, stats_.max_sequence_reordering);
-  EXPECT_EQ(0, stats_.max_time_reordering_us);
-  EXPECT_EQ(2u, stats_.packets_reordered);
-}
-
-TEST_P(QuicReceivedPacketManagerTest, EntropyHashBelowLeastObserved) {
-  if (GetParam().version > QUIC_VERSION_33) {
-    return;
-  }
-  EXPECT_EQ(0, received_manager_.EntropyHash(0));
-  RecordPacketReceipt(4, 5);
-  EXPECT_EQ(0, received_manager_.EntropyHash(3));
-}
-
-TEST_P(QuicReceivedPacketManagerTest, EntropyHashAboveLargestObserved) {
-  if (GetParam().version > QUIC_VERSION_33) {
-    return;
-  }
-  EXPECT_EQ(0, received_manager_.EntropyHash(0));
-  RecordPacketReceipt(4, 5);
-  EXPECT_EQ(0, received_manager_.EntropyHash(3));
-}
-
-TEST_P(QuicReceivedPacketManagerTest, SetCumulativeEntropyUpTo) {
-  if (GetParam().version > QUIC_VERSION_33) {
-    return;
-  }
-  vector<pair<QuicPacketNumber, QuicPacketEntropyHash>> entropies;
-  entropies.push_back(std::make_pair(1, 12));
-  entropies.push_back(std::make_pair(2, 1));
-  entropies.push_back(std::make_pair(3, 33));
-  entropies.push_back(std::make_pair(4, 3));
-  entropies.push_back(std::make_pair(6, 34));
-  entropies.push_back(std::make_pair(7, 29));
-
-  QuicPacketEntropyHash entropy_hash = 0;
-  for (size_t i = 0; i < entropies.size(); ++i) {
-    RecordPacketReceipt(entropies[i].first, entropies[i].second);
-    entropy_hash ^= entropies[i].second;
-  }
-  EXPECT_EQ(entropy_hash, received_manager_.EntropyHash(7));
-
-  // Now set the entropy hash up to 5 to be 100.
-  entropy_hash ^= 100;
-  for (size_t i = 0; i < 4; ++i) {
-    entropy_hash ^= entropies[i].second;
-  }
-  QuicReceivedPacketManagerPeer::SetCumulativeEntropyUpTo(&received_manager_, 5,
-                                                          100);
-  EXPECT_EQ(entropy_hash, received_manager_.EntropyHash(7));
-
-  QuicReceivedPacketManagerPeer::SetCumulativeEntropyUpTo(&received_manager_, 1,
-                                                          50);
-  EXPECT_EQ(entropy_hash, received_manager_.EntropyHash(7));
-
-  // No reordering.
-  EXPECT_EQ(0u, stats_.max_sequence_reordering);
-  EXPECT_EQ(0, stats_.max_time_reordering_us);
-  EXPECT_EQ(0u, stats_.packets_reordered);
-}
-
-TEST_P(QuicReceivedPacketManagerTest, DontWaitForPacketsBefore) {
-  QuicPacketHeader header;
-  header.packet_number = 2u;
-  received_manager_.RecordPacketReceived(0u, header, QuicTime::Zero());
-  header.packet_number = 7u;
-  received_manager_.RecordPacketReceived(0u, header, QuicTime::Zero());
-  EXPECT_TRUE(received_manager_.IsAwaitingPacket(3u));
-  EXPECT_TRUE(received_manager_.IsAwaitingPacket(6u));
-  EXPECT_TRUE(QuicReceivedPacketManagerPeer::DontWaitForPacketsBefore(
-      &received_manager_, 4));
-  EXPECT_FALSE(received_manager_.IsAwaitingPacket(3u));
-  EXPECT_TRUE(received_manager_.IsAwaitingPacket(6u));
-}
-
-TEST_P(QuicReceivedPacketManagerTest, GetUpdatedAckFrame) {
-  QuicPacketHeader header;
-  header.packet_number = 2u;
-  QuicTime two_ms = QuicTime::Zero() + QuicTime::Delta::FromMilliseconds(2);
-  EXPECT_FALSE(received_manager_.ack_frame_updated());
-  received_manager_.RecordPacketReceived(0u, header, two_ms);
-  EXPECT_TRUE(received_manager_.ack_frame_updated());
-
-  QuicFrame ack = received_manager_.GetUpdatedAckFrame(QuicTime::Zero());
-  EXPECT_FALSE(received_manager_.ack_frame_updated());
-  // When UpdateReceivedPacketInfo with a time earlier than the time of the
-  // largest observed packet, make sure that the delta is 0, not negative.
-  EXPECT_EQ(QuicTime::Delta::Zero(), ack.ack_frame->ack_delay_time);
-  EXPECT_EQ(1u, ack.ack_frame->received_packet_times.size());
-
-  QuicTime four_ms = QuicTime::Zero() + QuicTime::Delta::FromMilliseconds(4);
-  ack = received_manager_.GetUpdatedAckFrame(four_ms);
-  EXPECT_FALSE(received_manager_.ack_frame_updated());
-  // When UpdateReceivedPacketInfo after not having received a new packet,
-  // the delta should still be accurate.
-  EXPECT_EQ(QuicTime::Delta::FromMilliseconds(2),
-            ack.ack_frame->ack_delay_time);
-  // And received packet times won't have change.
-  EXPECT_EQ(1u, ack.ack_frame->received_packet_times.size());
-
-  header.packet_number = 999u;
-  received_manager_.RecordPacketReceived(0u, header, two_ms);
-  header.packet_number = 4u;
-  received_manager_.RecordPacketReceived(0u, header, two_ms);
-  header.packet_number = 1000u;
-  received_manager_.RecordPacketReceived(0u, header, two_ms);
-  EXPECT_TRUE(received_manager_.ack_frame_updated());
-  ack = received_manager_.GetUpdatedAckFrame(two_ms);
-  EXPECT_FALSE(received_manager_.ack_frame_updated());
-  // UpdateReceivedPacketInfo should discard any times which can't be
-  // expressed on the wire.
-  EXPECT_EQ(2u, ack.ack_frame->received_packet_times.size());
-}
-
-TEST_P(QuicReceivedPacketManagerTest, UpdateReceivedConnectionStats) {
-  EXPECT_FALSE(received_manager_.ack_frame_updated());
-  RecordPacketReceipt(1, 0);
-  EXPECT_TRUE(received_manager_.ack_frame_updated());
-  RecordPacketReceipt(6, 0);
-  RecordPacketReceipt(2, 0,
-                      QuicTime::Zero() + QuicTime::Delta::FromMilliseconds(1));
-
-  EXPECT_EQ(4u, stats_.max_sequence_reordering);
-  EXPECT_EQ(1000, stats_.max_time_reordering_us);
-  EXPECT_EQ(1u, stats_.packets_reordered);
-}
-
-}  // namespace
-}  // namespace test
-}  // namespace net