| // 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/quic/quic_write_blocked_list.h" |
| |
| #include "net/quic/test_tools/quic_test_utils.h" |
| #include "testing/gtest/include/gtest/gtest.h" |
| |
| using net::kV3LowestPriority; |
| using net::kV3HighestPriority; |
| |
| namespace net { |
| namespace test { |
| namespace { |
| |
| TEST(QuicWriteBlockedListTest, PriorityOrder) { |
| QuicWriteBlockedList write_blocked_list; |
| |
| // Mark streams blocked in roughly reverse priority order, and |
| // verify that streams are sorted. |
| write_blocked_list.RegisterStream(40, kV3LowestPriority); |
| write_blocked_list.RegisterStream(23, kV3HighestPriority); |
| write_blocked_list.RegisterStream(17, kV3HighestPriority); |
| write_blocked_list.RegisterStream(kHeadersStreamId, kV3HighestPriority); |
| write_blocked_list.RegisterStream(kCryptoStreamId, kV3HighestPriority); |
| |
| write_blocked_list.AddStream(40); |
| write_blocked_list.AddStream(23); |
| write_blocked_list.AddStream(17); |
| write_blocked_list.AddStream(kHeadersStreamId); |
| write_blocked_list.AddStream(kCryptoStreamId); |
| |
| EXPECT_EQ(5u, write_blocked_list.NumBlockedStreams()); |
| EXPECT_TRUE(write_blocked_list.HasWriteBlockedCryptoOrHeadersStream()); |
| EXPECT_TRUE(write_blocked_list.HasWriteBlockedDataStreams()); |
| // The Crypto stream is highest priority. |
| EXPECT_EQ(kCryptoStreamId, write_blocked_list.PopFront()); |
| // Followed by the Headers stream. |
| EXPECT_EQ(kHeadersStreamId, write_blocked_list.PopFront()); |
| // Streams with same priority are popped in the order they were inserted. |
| EXPECT_EQ(23u, write_blocked_list.PopFront()); |
| EXPECT_EQ(17u, write_blocked_list.PopFront()); |
| // Low priority stream appears last. |
| EXPECT_EQ(40u, write_blocked_list.PopFront()); |
| |
| EXPECT_EQ(0u, write_blocked_list.NumBlockedStreams()); |
| EXPECT_FALSE(write_blocked_list.HasWriteBlockedCryptoOrHeadersStream()); |
| EXPECT_FALSE(write_blocked_list.HasWriteBlockedDataStreams()); |
| } |
| |
| TEST(QuicWriteBlockedListTest, CryptoStream) { |
| QuicWriteBlockedList write_blocked_list; |
| write_blocked_list.RegisterStream(kCryptoStreamId, kV3HighestPriority); |
| write_blocked_list.AddStream(kCryptoStreamId); |
| |
| EXPECT_EQ(1u, write_blocked_list.NumBlockedStreams()); |
| EXPECT_TRUE(write_blocked_list.HasWriteBlockedCryptoOrHeadersStream()); |
| EXPECT_EQ(kCryptoStreamId, write_blocked_list.PopFront()); |
| EXPECT_EQ(0u, write_blocked_list.NumBlockedStreams()); |
| EXPECT_FALSE(write_blocked_list.HasWriteBlockedCryptoOrHeadersStream()); |
| } |
| |
| TEST(QuicWriteBlockedListTest, HeadersStream) { |
| QuicWriteBlockedList write_blocked_list; |
| write_blocked_list.RegisterStream(kHeadersStreamId, kV3HighestPriority); |
| write_blocked_list.AddStream(kHeadersStreamId); |
| |
| EXPECT_EQ(1u, write_blocked_list.NumBlockedStreams()); |
| EXPECT_TRUE(write_blocked_list.HasWriteBlockedCryptoOrHeadersStream()); |
| EXPECT_EQ(kHeadersStreamId, write_blocked_list.PopFront()); |
| EXPECT_EQ(0u, write_blocked_list.NumBlockedStreams()); |
| EXPECT_FALSE(write_blocked_list.HasWriteBlockedCryptoOrHeadersStream()); |
| } |
| |
| TEST(QuicWriteBlockedListTest, VerifyHeadersStream) { |
| QuicWriteBlockedList write_blocked_list; |
| write_blocked_list.RegisterStream(5, kV3HighestPriority); |
| write_blocked_list.RegisterStream(kHeadersStreamId, kV3HighestPriority); |
| write_blocked_list.AddStream(5); |
| write_blocked_list.AddStream(kHeadersStreamId); |
| |
| EXPECT_EQ(2u, write_blocked_list.NumBlockedStreams()); |
| EXPECT_TRUE(write_blocked_list.HasWriteBlockedCryptoOrHeadersStream()); |
| EXPECT_TRUE(write_blocked_list.HasWriteBlockedDataStreams()); |
| // In newer QUIC versions, there is a headers stream which is |
| // higher priority than data streams. |
| EXPECT_EQ(kHeadersStreamId, write_blocked_list.PopFront()); |
| EXPECT_EQ(5u, write_blocked_list.PopFront()); |
| EXPECT_EQ(0u, write_blocked_list.NumBlockedStreams()); |
| EXPECT_FALSE(write_blocked_list.HasWriteBlockedCryptoOrHeadersStream()); |
| EXPECT_FALSE(write_blocked_list.HasWriteBlockedDataStreams()); |
| } |
| |
| TEST(QuicWriteBlockedListTest, NoDuplicateEntries) { |
| // Test that QuicWriteBlockedList doesn't allow duplicate entries. |
| QuicWriteBlockedList write_blocked_list; |
| |
| // Try to add a stream to the write blocked list multiple times at the same |
| // priority. |
| const QuicStreamId kBlockedId = kClientDataStreamId1; |
| write_blocked_list.RegisterStream(kBlockedId, kV3HighestPriority); |
| write_blocked_list.AddStream(kBlockedId); |
| write_blocked_list.AddStream(kBlockedId); |
| write_blocked_list.AddStream(kBlockedId); |
| |
| // This should only result in one blocked stream being added. |
| EXPECT_EQ(1u, write_blocked_list.NumBlockedStreams()); |
| EXPECT_TRUE(write_blocked_list.HasWriteBlockedDataStreams()); |
| |
| // There should only be one stream to pop off the front. |
| EXPECT_EQ(kBlockedId, write_blocked_list.PopFront()); |
| EXPECT_EQ(0u, write_blocked_list.NumBlockedStreams()); |
| EXPECT_FALSE(write_blocked_list.HasWriteBlockedDataStreams()); |
| } |
| |
| TEST(QuicWriteBlockedListTest, BatchingWrites) { |
| QuicWriteBlockedList write_blocked_list; |
| |
| const QuicStreamId id1 = kClientDataStreamId1; |
| const QuicStreamId id2 = kClientDataStreamId2; |
| const QuicStreamId id3 = kClientDataStreamId2 + 2; |
| write_blocked_list.RegisterStream(id1, kV3LowestPriority); |
| write_blocked_list.RegisterStream(id2, kV3LowestPriority); |
| write_blocked_list.RegisterStream(id3, kV3HighestPriority); |
| |
| write_blocked_list.AddStream(id1); |
| write_blocked_list.AddStream(id2); |
| EXPECT_EQ(2u, write_blocked_list.NumBlockedStreams()); |
| |
| // The first stream we push back should stay at the front until 16k is |
| // written. |
| EXPECT_EQ(id1, write_blocked_list.PopFront()); |
| write_blocked_list.UpdateBytesForStream(id1, 15999); |
| write_blocked_list.AddStream(id1); |
| EXPECT_EQ(2u, write_blocked_list.NumBlockedStreams()); |
| EXPECT_EQ(id1, write_blocked_list.PopFront()); |
| |
| // Once 16k is written the first stream will yield to the next. |
| write_blocked_list.UpdateBytesForStream(id1, 1); |
| write_blocked_list.AddStream(id1); |
| EXPECT_EQ(2u, write_blocked_list.NumBlockedStreams()); |
| EXPECT_EQ(id2, write_blocked_list.PopFront()); |
| |
| // Set the new stream to have written all but one byte. |
| write_blocked_list.UpdateBytesForStream(id2, 15999); |
| write_blocked_list.AddStream(id2); |
| EXPECT_EQ(2u, write_blocked_list.NumBlockedStreams()); |
| |
| // Ensure higher priority streams are popped first. |
| write_blocked_list.AddStream(id3); |
| EXPECT_EQ(id3, write_blocked_list.PopFront()); |
| |
| // Higher priority streams will always be popped first, even if using their |
| // byte quota |
| write_blocked_list.UpdateBytesForStream(id3, 20000); |
| write_blocked_list.AddStream(id3); |
| EXPECT_EQ(id3, write_blocked_list.PopFront()); |
| |
| // Once the higher priority stream is out of the way, id2 will resume its 16k |
| // write, with only 1 byte remaining of its guaranteed write allocation. |
| EXPECT_EQ(id2, write_blocked_list.PopFront()); |
| write_blocked_list.AddStream(id2); |
| write_blocked_list.UpdateBytesForStream(id2, 1); |
| write_blocked_list.AddStream(id2); |
| EXPECT_EQ(2u, write_blocked_list.NumBlockedStreams()); |
| EXPECT_EQ(id1, write_blocked_list.PopFront()); |
| } |
| |
| TEST(QuicWriteBlockedListTest, Ceding) { |
| QuicWriteBlockedList write_blocked_list; |
| |
| write_blocked_list.RegisterStream(15, kV3HighestPriority); |
| write_blocked_list.RegisterStream(16, kV3HighestPriority); |
| write_blocked_list.RegisterStream(5, 5); |
| write_blocked_list.RegisterStream(4, 5); |
| write_blocked_list.RegisterStream(7, 7); |
| write_blocked_list.RegisterStream(kHeadersStreamId, kV3HighestPriority); |
| write_blocked_list.RegisterStream(kCryptoStreamId, kV3HighestPriority); |
| |
| // When nothing is on the list, nothing yields. |
| EXPECT_FALSE(write_blocked_list.ShouldYield(5)); |
| |
| write_blocked_list.AddStream(5); |
| // 5 should not yield to itself. |
| EXPECT_FALSE(write_blocked_list.ShouldYield(5)); |
| // 4 and 7 are equal or lower priority and should yield to 5. |
| EXPECT_TRUE(write_blocked_list.ShouldYield(4)); |
| EXPECT_TRUE(write_blocked_list.ShouldYield(7)); |
| // 15, headers and crypto should preempt 5. |
| EXPECT_FALSE(write_blocked_list.ShouldYield(15)); |
| EXPECT_FALSE(write_blocked_list.ShouldYield(kHeadersStreamId)); |
| EXPECT_FALSE(write_blocked_list.ShouldYield(kCryptoStreamId)); |
| |
| // Block a high priority stream. |
| write_blocked_list.AddStream(15); |
| // 16 should yield (same priority) but headers and crypto will still not. |
| EXPECT_TRUE(write_blocked_list.ShouldYield(16)); |
| EXPECT_FALSE(write_blocked_list.ShouldYield(kHeadersStreamId)); |
| EXPECT_FALSE(write_blocked_list.ShouldYield(kCryptoStreamId)); |
| |
| // Block the headers stream. All streams but crypto and headers should yield. |
| write_blocked_list.AddStream(kHeadersStreamId); |
| EXPECT_TRUE(write_blocked_list.ShouldYield(16)); |
| EXPECT_TRUE(write_blocked_list.ShouldYield(15)); |
| EXPECT_FALSE(write_blocked_list.ShouldYield(kHeadersStreamId)); |
| EXPECT_FALSE(write_blocked_list.ShouldYield(kCryptoStreamId)); |
| |
| // Block the crypto stream. All streams but crypto should yield. |
| write_blocked_list.AddStream(kCryptoStreamId); |
| EXPECT_TRUE(write_blocked_list.ShouldYield(16)); |
| EXPECT_TRUE(write_blocked_list.ShouldYield(15)); |
| EXPECT_TRUE(write_blocked_list.ShouldYield(kHeadersStreamId)); |
| EXPECT_FALSE(write_blocked_list.ShouldYield(kCryptoStreamId)); |
| } |
| |
| } // namespace |
| } // namespace test |
| } // namespace net |