197 lines
8.8 KiB
C
197 lines
8.8 KiB
C
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/*
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* Copyright 2017 The WebRTC project authors. All Rights Reserved.
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*
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* Use of this source code is governed by a BSD-style license
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* that can be found in the LICENSE file in the root of the source
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* tree. An additional intellectual property rights grant can be found
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* in the file PATENTS. All contributing project authors may
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* be found in the AUTHORS file in the root of the source tree.
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*/
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#ifndef PC_PEER_CONNECTION_WRAPPER_H_
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#define PC_PEER_CONNECTION_WRAPPER_H_
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#include <memory>
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#include <string>
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#include <vector>
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#include "api/data_channel_interface.h"
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#include "api/function_view.h"
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#include "api/jsep.h"
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#include "api/media_stream_interface.h"
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#include "api/media_types.h"
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#include "api/peer_connection_interface.h"
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#include "api/rtc_error.h"
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#include "api/rtp_sender_interface.h"
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#include "api/rtp_transceiver_interface.h"
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#include "api/scoped_refptr.h"
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#include "api/stats/rtc_stats_report.h"
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#include "pc/test/mock_peer_connection_observers.h"
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namespace webrtc {
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// Class that wraps a PeerConnection so that it is easier to use in unit tests.
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// Namely, gives a synchronous API for the event-callback-based API of
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// PeerConnection and provides an observer object that stores information from
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// PeerConnectionObserver callbacks.
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//
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// This is intended to be subclassed if additional information needs to be
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// stored with the PeerConnection (e.g., fake PeerConnection parameters so that
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// tests can be written against those interactions). The base
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// PeerConnectionWrapper should only have helper methods that are broadly
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// useful. More specific helper methods should be created in the test-specific
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// subclass.
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//
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// The wrapper is intended to be constructed by specialized factory methods on
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// a test fixture class then used as a local variable in each test case.
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class PeerConnectionWrapper {
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public:
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// Constructs a PeerConnectionWrapper from the given PeerConnection.
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// The given PeerConnectionFactory should be the factory that created the
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// PeerConnection and the MockPeerConnectionObserver should be the observer
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// that is watching the PeerConnection.
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PeerConnectionWrapper(
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rtc::scoped_refptr<PeerConnectionFactoryInterface> pc_factory,
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rtc::scoped_refptr<PeerConnectionInterface> pc,
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std::unique_ptr<MockPeerConnectionObserver> observer);
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virtual ~PeerConnectionWrapper();
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PeerConnectionFactoryInterface* pc_factory();
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PeerConnectionInterface* pc();
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MockPeerConnectionObserver* observer();
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// Calls the underlying PeerConnection's CreateOffer method and returns the
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// resulting SessionDescription once it is available. If the method call
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// failed, null is returned.
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std::unique_ptr<SessionDescriptionInterface> CreateOffer(
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const PeerConnectionInterface::RTCOfferAnswerOptions& options,
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std::string* error_out = nullptr);
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// Calls CreateOffer with default options.
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std::unique_ptr<SessionDescriptionInterface> CreateOffer();
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// Calls CreateOffer and sets a copy of the offer as the local description.
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std::unique_ptr<SessionDescriptionInterface> CreateOfferAndSetAsLocal(
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const PeerConnectionInterface::RTCOfferAnswerOptions& options);
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// Calls CreateOfferAndSetAsLocal with default options.
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std::unique_ptr<SessionDescriptionInterface> CreateOfferAndSetAsLocal();
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// Calls the underlying PeerConnection's CreateAnswer method and returns the
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// resulting SessionDescription once it is available. If the method call
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// failed, null is returned.
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std::unique_ptr<SessionDescriptionInterface> CreateAnswer(
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const PeerConnectionInterface::RTCOfferAnswerOptions& options,
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std::string* error_out = nullptr);
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// Calls CreateAnswer with the default options.
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std::unique_ptr<SessionDescriptionInterface> CreateAnswer();
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// Calls CreateAnswer and sets a copy of the offer as the local description.
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std::unique_ptr<SessionDescriptionInterface> CreateAnswerAndSetAsLocal(
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const PeerConnectionInterface::RTCOfferAnswerOptions& options);
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// Calls CreateAnswerAndSetAsLocal with default options.
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std::unique_ptr<SessionDescriptionInterface> CreateAnswerAndSetAsLocal();
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std::unique_ptr<SessionDescriptionInterface> CreateRollback();
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// Calls the underlying PeerConnection's SetLocalDescription method with the
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// given session description and waits for the success/failure response.
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// Returns true if the description was successfully set.
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bool SetLocalDescription(std::unique_ptr<SessionDescriptionInterface> desc,
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std::string* error_out = nullptr);
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// Calls the underlying PeerConnection's SetRemoteDescription method with the
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// given session description and waits for the success/failure response.
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// Returns true if the description was successfully set.
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bool SetRemoteDescription(std::unique_ptr<SessionDescriptionInterface> desc,
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std::string* error_out = nullptr);
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bool SetRemoteDescription(std::unique_ptr<SessionDescriptionInterface> desc,
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RTCError* error_out);
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// Does a round of offer/answer with the local PeerConnectionWrapper
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// generating the offer and the given PeerConnectionWrapper generating the
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// answer.
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// Equivalent to:
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// 1. this->CreateOffer(offer_options)
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// 2. this->SetLocalDescription(offer)
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// 3. answerer->SetRemoteDescription(offer)
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// 4. answerer->CreateAnswer(answer_options)
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// 5. answerer->SetLocalDescription(answer)
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// 6. this->SetRemoteDescription(answer)
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// Returns true if all steps succeed, false otherwise.
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// Suggested usage:
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// ASSERT_TRUE(caller->ExchangeOfferAnswerWith(callee.get()));
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bool ExchangeOfferAnswerWith(PeerConnectionWrapper* answerer);
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bool ExchangeOfferAnswerWith(
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PeerConnectionWrapper* answerer,
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const PeerConnectionInterface::RTCOfferAnswerOptions& offer_options,
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const PeerConnectionInterface::RTCOfferAnswerOptions& answer_options);
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// The following are wrappers for the underlying PeerConnection's
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// AddTransceiver method. They return the result of calling AddTransceiver
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// with the given arguments, DCHECKing if there is an error.
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rtc::scoped_refptr<RtpTransceiverInterface> AddTransceiver(
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cricket::MediaType media_type);
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rtc::scoped_refptr<RtpTransceiverInterface> AddTransceiver(
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cricket::MediaType media_type,
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const RtpTransceiverInit& init);
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rtc::scoped_refptr<RtpTransceiverInterface> AddTransceiver(
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rtc::scoped_refptr<MediaStreamTrackInterface> track);
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rtc::scoped_refptr<RtpTransceiverInterface> AddTransceiver(
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rtc::scoped_refptr<MediaStreamTrackInterface> track,
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const RtpTransceiverInit& init);
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// Returns a new dummy audio track with the given label.
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rtc::scoped_refptr<AudioTrackInterface> CreateAudioTrack(
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const std::string& label);
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// Returns a new dummy video track with the given label.
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rtc::scoped_refptr<VideoTrackInterface> CreateVideoTrack(
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const std::string& label);
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// Wrapper for the underlying PeerConnection's AddTrack method. DCHECKs if
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// AddTrack fails.
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rtc::scoped_refptr<RtpSenderInterface> AddTrack(
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rtc::scoped_refptr<MediaStreamTrackInterface> track,
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const std::vector<std::string>& stream_ids = {});
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// Calls the underlying PeerConnection's AddTrack method with an audio media
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// stream track not bound to any source.
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rtc::scoped_refptr<RtpSenderInterface> AddAudioTrack(
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const std::string& track_label,
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const std::vector<std::string>& stream_ids = {});
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// Calls the underlying PeerConnection's AddTrack method with a video media
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// stream track fed by a FakeVideoTrackSource.
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rtc::scoped_refptr<RtpSenderInterface> AddVideoTrack(
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const std::string& track_label,
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const std::vector<std::string>& stream_ids = {});
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// Calls the underlying PeerConnection's CreateDataChannel method with default
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// initialization parameters.
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rtc::scoped_refptr<DataChannelInterface> CreateDataChannel(
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const std::string& label);
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// Returns the signaling state of the underlying PeerConnection.
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PeerConnectionInterface::SignalingState signaling_state();
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// Returns true if ICE has finished gathering candidates.
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bool IsIceGatheringDone();
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// Returns true if ICE has established a connection.
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bool IsIceConnected();
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// Calls GetStats() on the underlying PeerConnection and returns the resulting
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// report. If GetStats() fails, this method returns null and fails the test.
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rtc::scoped_refptr<const RTCStatsReport> GetStats();
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private:
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std::unique_ptr<SessionDescriptionInterface> CreateSdp(
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rtc::FunctionView<void(CreateSessionDescriptionObserver*)> fn,
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std::string* error_out);
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bool SetSdp(rtc::FunctionView<void(SetSessionDescriptionObserver*)> fn,
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std::string* error_out);
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rtc::scoped_refptr<PeerConnectionFactoryInterface> pc_factory_;
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std::unique_ptr<MockPeerConnectionObserver> observer_;
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rtc::scoped_refptr<PeerConnectionInterface> pc_;
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};
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} // namespace webrtc
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#endif // PC_PEER_CONNECTION_WRAPPER_H_
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