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/*
* Copyright (c) 2019 The WebRTC project authors. All Rights Reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
#ifndef TEST_PEER_SCENARIO_PEER_SCENARIO_H_
#define TEST_PEER_SCENARIO_PEER_SCENARIO_H_
// The peer connection scenario test framework enables writing end to end unit
// tests on the peer connection level. It's similar to the Scenario test but
// uses the full stack, including SDP and ICE negotiation. This ensures that
// features work end to end. It's also diffferent from the other tests on peer
// connection level in that it does not rely on any mocks or fakes other than
// for media input and networking. Additionally it provides direct access to the
// underlying peer connection class.
#include <list>
#include <vector>
#include "api/test/time_controller.h"
#include "test/gtest.h"
#include "test/logging/log_writer.h"
#include "test/network/network_emulation_manager.h"
#include "test/peer_scenario/peer_scenario_client.h"
#include "test/peer_scenario/signaling_route.h"
#include "test/scenario/stats_collection.h"
#include "test/scenario/video_frame_matcher.h"
namespace webrtc {
namespace test {
// The PeerScenario class represents a PeerConnection simulation scenario. The
// main purpose is to maintain ownership and ensure safe destruction order of
// clients and network emulation. Additionally it reduces the amount of boiler
// plate requited for some actions. For example usage see the existing tests
// using this class. Note that it should be used from a single calling thread.
// This thread will also be assigned as the signaling thread for all peer
// connections that are created. This means that the process methods must be
// used when waiting to ensure that messages are processed on the signaling
// thread.
class PeerScenario {
public:
// The name is used for log output when those are enabled by the --peer_logs
// command line flag. Optionally, the TestInfo struct available in gtest can
// be used to automatically generate a path based on the test name.
explicit PeerScenario(const testing::TestInfo& test_info,
TimeMode mode = TimeMode::kSimulated);
explicit PeerScenario(std::string file_name,
TimeMode mode = TimeMode::kSimulated);
explicit PeerScenario(
std::unique_ptr<LogWriterFactoryInterface> log_writer_manager,
TimeMode mode = TimeMode::kSimulated);
NetworkEmulationManagerImpl* net() { return &net_; }
// Creates a client wrapping a peer connection conforming to the given config.
// The client will share the signaling thread with the scenario. To maintain
// control of destruction order, ownership is kept within the scenario.
PeerScenarioClient* CreateClient(PeerScenarioClient::Config config);
PeerScenarioClient* CreateClient(std::string name,
PeerScenarioClient::Config config);
// Sets up a signaling route that can be used for SDP and ICE.
SignalingRoute ConnectSignaling(PeerScenarioClient* caller,
PeerScenarioClient* callee,
std::vector<EmulatedNetworkNode*> send_link,
std::vector<EmulatedNetworkNode*> ret_link);
// Connects two clients over given links. This will also start ICE signaling
// and SDP negotiation with default behavior. For customized behavior,
// ConnectSignaling should be used to allow more detailed control, for
// instance to allow different signaling and media routes.
void SimpleConnection(PeerScenarioClient* caller,
PeerScenarioClient* callee,
std::vector<EmulatedNetworkNode*> send_link,
std::vector<EmulatedNetworkNode*> ret_link);
// Starts feeding the results of comparing captured frames from `send_track`
// with decoded frames on `receiver` to `analyzer`.
// TODO(srte): Provide a way to detach to allow removal of tracks.
void AttachVideoQualityAnalyzer(VideoQualityAnalyzer* analyzer,
VideoTrackInterface* send_track,
PeerScenarioClient* receiver);
// Waits on `event` while processing messages on the signaling thread.
bool WaitAndProcess(std::atomic<bool>* event,
TimeDelta max_duration = TimeDelta::Seconds(5));
// Process messages on the signaling thread for the given duration.
void ProcessMessages(TimeDelta duration);
private:
// Helper struct to maintain ownership of the matcher and taps.
struct PeerVideoQualityPair {
public:
PeerVideoQualityPair(Clock* capture_clock, VideoQualityAnalyzer* analyzer)
: matcher_({analyzer->Handler()}),
capture_tap_(capture_clock, &matcher_),
decode_tap_(capture_clock, &matcher_, 0) {}
VideoFrameMatcher matcher_;
CapturedFrameTap capture_tap_;
DecodedFrameTap decode_tap_;
};
Clock* clock() { return Clock::GetRealTimeClock(); }
std::unique_ptr<LogWriterFactoryInterface> GetLogWriterFactory(
std::string name);
const std::unique_ptr<LogWriterFactoryInterface> log_writer_manager_;
NetworkEmulationManagerImpl net_;
Thread* const signaling_thread_;
std::list<PeerVideoQualityPair> video_quality_pairs_;
std::list<PeerScenarioClient> peer_clients_;
};
} // namespace test
} // namespace webrtc
#endif // TEST_PEER_SCENARIO_PEER_SCENARIO_H_
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