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// Copyright (c) 2018 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 "quic/core/qpack/qpack_encoder_stream_sender.h"
#include "absl/strings/escaping.h"
#include "quic/platform/api/quic_test.h"
#include "quic/test_tools/qpack/qpack_test_utils.h"
#include "common/platform/api/quiche_text_utils.h"
using ::testing::Eq;
using ::testing::StrictMock;
namespace quic {
namespace test {
namespace {
class QpackEncoderStreamSenderTest : public QuicTest {
protected:
QpackEncoderStreamSenderTest() {
stream_.set_qpack_stream_sender_delegate(&delegate_);
}
~QpackEncoderStreamSenderTest() override = default;
StrictMock<MockQpackStreamSenderDelegate> delegate_;
QpackEncoderStreamSender stream_;
};
TEST_F(QpackEncoderStreamSenderTest, InsertWithNameReference) {
EXPECT_EQ(0u, stream_.BufferedByteCount());
// Static, index fits in prefix, empty value.
std::string expected_encoded_data = absl::HexStringToBytes("c500");
EXPECT_CALL(delegate_, WriteStreamData(Eq(expected_encoded_data)));
stream_.SendInsertWithNameReference(true, 5, "");
EXPECT_EQ(expected_encoded_data.size(), stream_.BufferedByteCount());
stream_.Flush();
// Static, index fits in prefix, Huffman encoded value.
expected_encoded_data = absl::HexStringToBytes("c28294e7");
EXPECT_CALL(delegate_, WriteStreamData(Eq(expected_encoded_data)));
stream_.SendInsertWithNameReference(true, 2, "foo");
EXPECT_EQ(expected_encoded_data.size(), stream_.BufferedByteCount());
stream_.Flush();
// Not static, index does not fit in prefix, not Huffman encoded value.
expected_encoded_data = absl::HexStringToBytes("bf4a03626172");
EXPECT_CALL(delegate_, WriteStreamData(Eq(expected_encoded_data)));
stream_.SendInsertWithNameReference(false, 137, "bar");
EXPECT_EQ(expected_encoded_data.size(), stream_.BufferedByteCount());
stream_.Flush();
// Value length does not fit in prefix.
// 'Z' would be Huffman encoded to 8 bits, so no Huffman encoding is used.
expected_encoded_data = absl::HexStringToBytes(
"aa7f005a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a"
"5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a"
"5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a"
"5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a");
EXPECT_CALL(delegate_, WriteStreamData(Eq(expected_encoded_data)));
stream_.SendInsertWithNameReference(false, 42, std::string(127, 'Z'));
EXPECT_EQ(expected_encoded_data.size(), stream_.BufferedByteCount());
stream_.Flush();
}
TEST_F(QpackEncoderStreamSenderTest, InsertWithoutNameReference) {
EXPECT_EQ(0u, stream_.BufferedByteCount());
// Empty name and value.
std::string expected_encoded_data = absl::HexStringToBytes("4000");
EXPECT_CALL(delegate_, WriteStreamData(Eq(expected_encoded_data)));
stream_.SendInsertWithoutNameReference("", "");
EXPECT_EQ(expected_encoded_data.size(), stream_.BufferedByteCount());
stream_.Flush();
// Huffman encoded short strings.
expected_encoded_data = absl::HexStringToBytes("6294e78294e7");
EXPECT_CALL(delegate_, WriteStreamData(Eq(expected_encoded_data)));
stream_.SendInsertWithoutNameReference("foo", "foo");
EXPECT_EQ(expected_encoded_data.size(), stream_.BufferedByteCount());
stream_.Flush();
// Not Huffman encoded short strings.
expected_encoded_data = absl::HexStringToBytes("4362617203626172");
EXPECT_CALL(delegate_, WriteStreamData(Eq(expected_encoded_data)));
stream_.SendInsertWithoutNameReference("bar", "bar");
EXPECT_EQ(expected_encoded_data.size(), stream_.BufferedByteCount());
stream_.Flush();
// Not Huffman encoded long strings; length does not fit on prefix.
// 'Z' would be Huffman encoded to 8 bits, so no Huffman encoding is used.
expected_encoded_data = absl::HexStringToBytes(
"5f005a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a7f"
"005a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a"
"5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a"
"5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a"
"5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a");
EXPECT_CALL(delegate_, WriteStreamData(Eq(expected_encoded_data)));
stream_.SendInsertWithoutNameReference(std::string(31, 'Z'),
std::string(127, 'Z'));
EXPECT_EQ(expected_encoded_data.size(), stream_.BufferedByteCount());
stream_.Flush();
}
TEST_F(QpackEncoderStreamSenderTest, Duplicate) {
EXPECT_EQ(0u, stream_.BufferedByteCount());
// Small index fits in prefix.
std::string expected_encoded_data = absl::HexStringToBytes("11");
EXPECT_CALL(delegate_, WriteStreamData(Eq(expected_encoded_data)));
stream_.SendDuplicate(17);
EXPECT_EQ(expected_encoded_data.size(), stream_.BufferedByteCount());
stream_.Flush();
// Large index requires two extension bytes.
expected_encoded_data = absl::HexStringToBytes("1fd503");
EXPECT_CALL(delegate_, WriteStreamData(Eq(expected_encoded_data)));
stream_.SendDuplicate(500);
EXPECT_EQ(expected_encoded_data.size(), stream_.BufferedByteCount());
stream_.Flush();
}
TEST_F(QpackEncoderStreamSenderTest, SetDynamicTableCapacity) {
EXPECT_EQ(0u, stream_.BufferedByteCount());
// Small capacity fits in prefix.
std::string expected_encoded_data = absl::HexStringToBytes("31");
EXPECT_CALL(delegate_, WriteStreamData(Eq(expected_encoded_data)));
stream_.SendSetDynamicTableCapacity(17);
EXPECT_EQ(expected_encoded_data.size(), stream_.BufferedByteCount());
stream_.Flush();
EXPECT_EQ(0u, stream_.BufferedByteCount());
// Large capacity requires two extension bytes.
expected_encoded_data = absl::HexStringToBytes("3fd503");
EXPECT_CALL(delegate_, WriteStreamData(Eq(expected_encoded_data)));
stream_.SendSetDynamicTableCapacity(500);
EXPECT_EQ(expected_encoded_data.size(), stream_.BufferedByteCount());
stream_.Flush();
EXPECT_EQ(0u, stream_.BufferedByteCount());
}
// No writes should happen until Flush is called.
TEST_F(QpackEncoderStreamSenderTest, Coalesce) {
// Insert entry with static name reference, empty value.
stream_.SendInsertWithNameReference(true, 5, "");
// Insert entry with static name reference, Huffman encoded value.
stream_.SendInsertWithNameReference(true, 2, "foo");
// Insert literal entry, Huffman encoded short strings.
stream_.SendInsertWithoutNameReference("foo", "foo");
// Duplicate entry.
stream_.SendDuplicate(17);
std::string expected_encoded_data = absl::HexStringToBytes(
"c500" // Insert entry with static name reference.
"c28294e7" // Insert entry with static name reference.
"6294e78294e7" // Insert literal entry.
"11"); // Duplicate entry.
EXPECT_CALL(delegate_, WriteStreamData(Eq(expected_encoded_data)));
EXPECT_EQ(expected_encoded_data.size(), stream_.BufferedByteCount());
stream_.Flush();
EXPECT_EQ(0u, stream_.BufferedByteCount());
}
// No writes should happen if QpackEncoderStreamSender::Flush() is called
// when the buffer is empty.
TEST_F(QpackEncoderStreamSenderTest, FlushEmpty) {
EXPECT_EQ(0u, stream_.BufferedByteCount());
stream_.Flush();
EXPECT_EQ(0u, stream_.BufferedByteCount());
}
} // namespace
} // namespace test
} // namespace quic
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