Define Stable API for WebRTC/Quartc

net/quic/quartc/quartc_stream_test.cc

+// Copyright (c) 2016 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/quartc/quartc_stream.h"
+
+#include "base/threading/thread_task_runner_handle.h"
+#include "net/quic/core/crypto/quic_random.h"
+#include "net/quic/core/quic_session.h"
+#include "net/quic/core/quic_simple_buffer_allocator.h"
+#include "net/quic/quartc/quartc_alarm_factory.h"
+#include "net/quic/quartc/quartc_stream_interface.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+namespace net {
+namespace test {
+namespace {
+
+static const SpdyPriority kDefaultPriority = 3;
+static const QuicStreamId kStreamId = 5;
+static const QuartcStreamInterface::WriteParameters kDefaultParam;
+
+// MockQuicSession that does not create streams and writes data from
+// ReliableQuicStream to a string.
+class MockQuicSession : public QuicSession {
+ public:
+  MockQuicSession(QuicConnection* connection,
+                  const QuicConfig& config,
+                  std::string* write_buffer)
+      : QuicSession(connection, nullptr /*visitor*/, config),
+        write_buffer_(write_buffer) {}
+
+  // Writes outgoing data from ReliableQuicStream to a string.
+  QuicConsumedData WritevData(
+      ReliableQuicStream* stream,
+      QuicStreamId id,
+      QuicIOVector iovector,
+      QuicStreamOffset offset,
+      bool fin,
+      QuicAckListenerInterface* ack_notifier_delegate) override {
+    if (!writable_) {
+      return QuicConsumedData(0, false);
+    }
+
+    const char* data = reinterpret_cast<const char*>(iovector.iov->iov_base);
+    size_t len = iovector.total_length;
+    write_buffer_->append(data, len);
+    return QuicConsumedData(len, fin);
+  }
+
+  QuartcStream* CreateIncomingDynamicStream(QuicStreamId id) override {
+    return nullptr;
+  }
+
+  QuartcStream* CreateOutgoingDynamicStream(SpdyPriority priority) override {
+    return nullptr;
+  }
+
+  QuicCryptoStream* GetCryptoStream() override { return nullptr; }
+
+  // Called by ReliableQuicStream when they want to close stream.
+  void SendRstStream(QuicStreamId id,
+                     QuicRstStreamErrorCode error,
+                     QuicStreamOffset bytes_written) override {}
+
+  // Sets whether data is written to buffer, or else if this is write blocked.
+  void set_writable(bool writable) { writable_ = writable; }
+
+  // Tracks whether the stream is write blocked and its priority.
+  void RegisterReliableStream(QuicStreamId stream_id, SpdyPriority priority) {
+    write_blocked_streams()->RegisterStream(stream_id, priority);
+  }
+
+  // The session take ownership of the stream.
+  void ActivateReliableStream(std::unique_ptr<ReliableQuicStream> stream) {
+    ActivateStream(std::move(stream));
+  }
+
+ private:
+  // Stores written data from ReliableQuicStreamAdapter.
+  std::string* write_buffer_;
+  // Whether data is written to write_buffer_.
+  bool writable_ = true;
+};
+
+// Packet writer that does nothing. This is required for QuicConnection but
+// isn't used for writing data.
+class DummyPacketWriter : public QuicPacketWriter {
+ public:
+  DummyPacketWriter() {}
+
+  // QuicPacketWriter overrides.
+  WriteResult WritePacket(const char* buffer,
+                          size_t buf_len,
+                          const IPAddress& self_address,
+                          const IPEndPoint& peer_address,
+                          PerPacketOptions* options) override {
+    return WriteResult(WRITE_STATUS_ERROR, 0);
+  }
+
+  bool IsWriteBlockedDataBuffered() const override { return false; }
+
+  bool IsWriteBlocked() const override { return false; };
+
+  void SetWritable() override {}
+
+  QuicByteCount GetMaxPacketSize(
+      const IPEndPoint& peer_address) const override {
+    return 0;
+  }
+};
+
+class MockQuartcStreamDelegate : public QuartcStreamInterface::Delegate {
+ public:
+  MockQuartcStreamDelegate(int id, std::string& read_buffer)
+      : id_(id), read_buffer_(read_buffer) {}
+
+  void OnBufferedAmountDecrease(QuartcStreamInterface* stream) override {
+    queued_bytes_amount_ = stream->buffered_amount();
+  }
+
+  void OnReceived(QuartcStreamInterface* stream,
+                  const char* data,
+                  size_t size) override {
+    EXPECT_EQ(id_, stream->stream_id());
+    read_buffer_.append(data, size);
+  }
+
+  void OnClose(QuartcStreamInterface* stream, int error_code) override {
+    closed_ = true;
+  }
+
+  bool closed() { return closed_; }
+
+  int queued_bytes_amount() { return queued_bytes_amount_; }
+
+ protected:
+  uint32_t id_;
+  // Data read by the ReliableQuicStream.
+  std::string& read_buffer_;
+  // Whether the ReliableQuicStream is closed.
+  bool closed_ = false;
+  int queued_bytes_amount_ = -1;
+};
+
+class QuartcStreamTest : public ::testing::Test,
+                         public QuicConnectionHelperInterface {
+ public:
+  void CreateReliableQuicStream() {
+    // Arbitrary values for QuicConnection.
+    Perspective perspective = Perspective::IS_SERVER;
+    IPAddress ip(0, 0, 0, 0);
+    bool owns_writer = true;
+    alarm_factory_.reset(new QuartcAlarmFactory(
+        base::ThreadTaskRunnerHandle::Get().get(), GetClock()));
+
+    connection_.reset(new QuicConnection(
+        0, IPEndPoint(ip, 0), this /*QuicConnectionHelperInterface*/,
+        alarm_factory_.get(), new DummyPacketWriter(), owns_writer, perspective,
+        AllSupportedVersions()));
+
+    session_.reset(
+        new MockQuicSession(connection_.get(), QuicConfig(), &write_buffer_));
+    mock_stream_delegate_.reset(
+        new MockQuartcStreamDelegate(kStreamId, read_buffer_));
+    stream_ = new QuartcStream(kStreamId, session_.get());
+    stream_->SetDelegate(mock_stream_delegate_.get());
+    session_->RegisterReliableStream(stream_->stream_id(), kDefaultPriority);
+    session_->ActivateReliableStream(std::unique_ptr<QuartcStream>(stream_));
+  }
+
+  const QuicClock* GetClock() const override { return &clock_; }
+
+  QuicRandom* GetRandomGenerator() override {
+    return QuicRandom::GetInstance();
+  }
+
+  QuicBufferAllocator* GetBufferAllocator() override {
+    return &buffer_allocator_;
+  }
+
+ protected:
+  // The QuicSession will take the ownership.
+  QuartcStream* stream_;
+  std::unique_ptr<MockQuartcStreamDelegate> mock_stream_delegate_;
+  std::unique_ptr<MockQuicSession> session_;
+  // Data written by the ReliableQuicStreamAdapterTest.
+  std::string write_buffer_;
+  // Data read by the ReliableQuicStreamAdapterTest.
+  std::string read_buffer_;
+  std::unique_ptr<QuartcAlarmFactory> alarm_factory_;
+  std::unique_ptr<QuicConnection> connection_;
+  // Used to implement the QuicConnectionHelperInterface.
+  SimpleBufferAllocator buffer_allocator_;
+  QuicClock clock_;
+};
+
+// Write an entire string.
+TEST_F(QuartcStreamTest, WriteDataWhole) {
+  CreateReliableQuicStream();
+  stream_->Write("Foo bar", 7, kDefaultParam);
+  EXPECT_EQ("Foo bar", write_buffer_);
+}
+
+// Write part of a string.
+TEST_F(QuartcStreamTest, WriteDataPartial) {
+  CreateReliableQuicStream();
+  stream_->Write("Foo bar", 5, kDefaultParam);
+  EXPECT_EQ("Foo b", write_buffer_);
+}
+
+// Test that strings are buffered correctly.
+TEST_F(QuartcStreamTest, BufferData) {
+  CreateReliableQuicStream();
+
+  session_->set_writable(false);
+  stream_->Write("Foo bar", 7, kDefaultParam);
+  // The data will be buffered.
+  EXPECT_EQ(0ul, write_buffer_.size());
+  EXPECT_TRUE(stream_->HasBufferedData());
+  EXPECT_EQ(-1, mock_stream_delegate_->queued_bytes_amount());
+  // The session is writable and the buffered data amount will change.
+  session_->set_writable(true);
+  stream_->OnCanWrite();
+  EXPECT_EQ(0, mock_stream_delegate_->queued_bytes_amount());
+  EXPECT_FALSE(stream_->HasBufferedData());
+  EXPECT_EQ("Foo bar", write_buffer_);
+
+  stream_->Write("xyzzy", 5, kDefaultParam);
+  EXPECT_EQ("Foo barxyzzy", write_buffer_);
+}
+
+// Read an entire string.
+TEST_F(QuartcStreamTest, ReadDataWhole) {
+  CreateReliableQuicStream();
+  QuicStreamFrame frame(kStreamId, false, 0, "Hello, World!");
+  stream_->OnStreamFrame(frame);
+
+  EXPECT_EQ("Hello, World!", read_buffer_);
+}
+
+// Read part of a string.
+TEST_F(QuartcStreamTest, ReadDataPartial) {
+  CreateReliableQuicStream();
+  QuicStreamFrame frame(kStreamId, false, 0, "Hello, World!");
+  frame.data_length = 5;
+  stream_->OnStreamFrame(frame);
+
+  EXPECT_EQ("Hello", read_buffer_);
+}
+
+// Test that closing the stream results in a callback.
+TEST_F(QuartcStreamTest, CloseStream) {
+  CreateReliableQuicStream();
+  EXPECT_FALSE(mock_stream_delegate_->closed());
+  stream_->OnClose();
+  EXPECT_TRUE(mock_stream_delegate_->closed());
+}
+
+}  // namespace
+}  // namespace test
+}  // namespace net