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// 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"
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.PushBack(40,
QuicWriteBlockedList::kLowestPriority);
write_blocked_list.PushBack(23,
QuicWriteBlockedList::kHighestPriority);
write_blocked_list.PushBack(17,
QuicWriteBlockedList::kHighestPriority);
write_blocked_list.PushBack(kHeadersStreamId,
QuicWriteBlockedList::kHighestPriority);
write_blocked_list.PushBack(kCryptoStreamId,
QuicWriteBlockedList::kHighestPriority);
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.PushBack(kCryptoStreamId,
QuicWriteBlockedList::kHighestPriority);
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.PushBack(kHeadersStreamId,
QuicWriteBlockedList::kHighestPriority);
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.PushBack(5,
QuicWriteBlockedList::kHighestPriority);
write_blocked_list.PushBack(kHeadersStreamId,
QuicWriteBlockedList::kHighestPriority);
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.PushBack(kBlockedId,
QuicWriteBlockedList::kHighestPriority);
write_blocked_list.PushBack(kBlockedId,
QuicWriteBlockedList::kHighestPriority);
write_blocked_list.PushBack(kBlockedId,
QuicWriteBlockedList::kHighestPriority);
// 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());
}
} // namespace
} // namespace test
} // namespace net
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