Migrate PeerConnection tests to EnableMedia api

Add test helper to inject fake media engine for those tests.

Bug: webrtc:15574
Change-Id: Iae4282d2d3b9804548ccadf58797f39508f07c6a
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/325880
Commit-Queue: Danil Chapovalov <danilchap@webrtc.org>
Reviewed-by: Harald Alvestrand <hta@webrtc.org>
Cr-Commit-Position: refs/heads/main@{#41075}

pc/BUILD.gn

@@ -2372,6 +2372,7 @@ if (rtc_include_tests && !build_with_chromium) {
       ":dtls_srtp_transport",
       ":dtls_transport",
       ":dtmf_sender",
+      ":enable_fake_media",
       ":ice_server_parsing",
       ":integration_test_helpers",
       ":jitter_buffer_delay",
@@ -2532,7 +2533,6 @@ if (rtc_include_tests && !build_with_chromium) {
       ":libjingle_peerconnection",
       ":pc_test_utils",
       ":rtc_pc",
-      "../api:callfactory_api",
       "../api:rtc_event_log_output_file",
       "../api:rtc_stats_api",
       "../api:rtp_parameters",
@@ -2729,6 +2729,23 @@ if (rtc_include_tests && !build_with_chromium) {
     ]
   }
 
+  rtc_library("enable_fake_media") {
+    testonly = true
+    visibility = [ ":*" ]
+    sources = [
+      "test/enable_fake_media.cc",
+      "test/enable_fake_media.h",
+    ]
+    deps = [
+      ":media_factory",
+      "../api:libjingle_peerconnection_api",
+      "../call:call_interfaces",
+      "../media:rtc_media_tests_utils",
+      "../rtc_base:checks",
+    ]
+    absl_deps = [ "//third_party/abseil-cpp/absl/base:nullability" ]
+  }
+
   rtc_library("pc_test_utils") {
     testonly = true
     sources = [
@@ -2761,6 +2778,7 @@ if (rtc_include_tests && !build_with_chromium) {
     deps = [
       ":channel",
       ":channel_interface",
+      ":enable_fake_media",
       ":jitter_buffer_delay",
       ":libjingle_peerconnection",
       ":peer_connection_internal",

pc/peer_connection_data_channel_unittest.cc

@@ -15,7 +15,6 @@
 #include <vector>
 
 #include "absl/types/optional.h"
-#include "api/call/call_factory_interface.h"
 #include "api/jsep.h"
 #include "api/media_types.h"
 #include "api/peer_connection_interface.h"
@@ -24,8 +23,6 @@
 #include "api/task_queue/default_task_queue_factory.h"
 #include "api/task_queue/task_queue_factory.h"
 #include "api/transport/sctp_transport_factory_interface.h"
-#include "media/base/fake_media_engine.h"
-#include "media/base/media_engine.h"
 #include "p2p/base/p2p_constants.h"
 #include "p2p/base/port_allocator.h"
 #include "pc/media_session.h"
@@ -35,6 +32,7 @@
 #include "pc/sctp_transport.h"
 #include "pc/sdp_utils.h"
 #include "pc/session_description.h"
+#include "pc/test/enable_fake_media.h"
 #include "pc/test/mock_peer_connection_observers.h"
 #include "rtc_base/checks.h"
 #include "rtc_base/logging.h"
@@ -64,8 +62,7 @@ PeerConnectionFactoryDependencies CreatePeerConnectionFactoryDependencies() {
   deps.worker_thread = rtc::Thread::Current();
   deps.signaling_thread = rtc::Thread::Current();
   deps.task_queue_factory = CreateDefaultTaskQueueFactory();
-  deps.media_engine = std::make_unique<cricket::FakeMediaEngine>();
-  deps.call_factory = CreateCallFactory();
+  EnableFakeMedia(deps);
   deps.sctp_factory = std::make_unique<FakeSctpTransportFactory>();
   return deps;
 }

pc/peer_connection_header_extension_unittest.cc

@@ -16,7 +16,6 @@
 
 #include "absl/strings/string_view.h"
 #include "absl/types/optional.h"
-#include "api/call/call_factory_interface.h"
 #include "api/jsep.h"
 #include "api/media_types.h"
 #include "api/peer_connection_interface.h"
@@ -35,6 +34,7 @@
 #include "p2p/base/port_allocator.h"
 #include "pc/peer_connection_wrapper.h"
 #include "pc/session_description.h"
+#include "pc/test/enable_fake_media.h"
 #include "pc/test/mock_peer_connection_observers.h"
 #include "rtc_base/internal/default_socket_server.h"
 #include "rtc_base/rtc_certificate_generator.h"
@@ -77,21 +77,18 @@ class PeerConnectionHeaderExtensionTest
   std::unique_ptr<PeerConnectionWrapper> CreatePeerConnection(
       cricket::MediaType media_type,
       absl::optional<SdpSemantics> semantics) {
-    auto voice = std::make_unique<cricket::FakeVoiceEngine>();
-    auto video = std::make_unique<cricket::FakeVideoEngine>();
+    auto media_engine = std::make_unique<cricket::FakeMediaEngine>();
     if (media_type == cricket::MediaType::MEDIA_TYPE_AUDIO)
-      voice->SetRtpHeaderExtensions(extensions_);
+      media_engine->fake_voice_engine()->SetRtpHeaderExtensions(extensions_);
     else
-      video->SetRtpHeaderExtensions(extensions_);
-    auto media_engine = std::make_unique<cricket::CompositeMediaEngine>(
-        std::move(voice), std::move(video));
+      media_engine->fake_video_engine()->SetRtpHeaderExtensions(extensions_);
     PeerConnectionFactoryDependencies factory_dependencies;
     factory_dependencies.network_thread = rtc::Thread::Current();
     factory_dependencies.worker_thread = rtc::Thread::Current();
     factory_dependencies.signaling_thread = rtc::Thread::Current();
     factory_dependencies.task_queue_factory = CreateDefaultTaskQueueFactory();
-    factory_dependencies.media_engine = std::move(media_engine);
-    factory_dependencies.call_factory = CreateCallFactory();
+    EnableFakeMedia(factory_dependencies, std::move(media_engine));
+
     factory_dependencies.event_log_factory =
         std::make_unique<RtcEventLogFactory>(
             factory_dependencies.task_queue_factory.get());

pc/peer_connection_histogram_unittest.cc

@@ -16,7 +16,6 @@
 
 #include "absl/types/optional.h"
 #include "api/async_resolver_factory.h"
-#include "api/call/call_factory_interface.h"
 #include "api/jsep.h"
 #include "api/jsep_session_description.h"
 #include "api/peer_connection_interface.h"
@@ -25,7 +24,6 @@
 #include "api/task_queue/default_task_queue_factory.h"
 #include "api/task_queue/task_queue_factory.h"
 #include "api/test/mock_async_dns_resolver.h"
-#include "media/base/fake_media_engine.h"
 #include "media/base/media_engine.h"
 #include "p2p/base/mock_async_resolver.h"
 #include "p2p/base/port_allocator.h"
@@ -35,6 +33,7 @@
 #include "pc/peer_connection_proxy.h"
 #include "pc/peer_connection_wrapper.h"
 #include "pc/sdp_utils.h"
+#include "pc/test/enable_fake_media.h"
 #include "pc/test/mock_peer_connection_observers.h"
 #include "pc/usage_pattern.h"
 #include "pc/webrtc_sdp.h"
@@ -84,9 +83,7 @@ class PeerConnectionFactoryForUsageHistogramTest
           dependencies.worker_thread = rtc::Thread::Current();
           dependencies.signaling_thread = rtc::Thread::Current();
           dependencies.task_queue_factory = CreateDefaultTaskQueueFactory();
-          dependencies.media_engine =
-              std::make_unique<cricket::FakeMediaEngine>();
-          dependencies.call_factory = CreateCallFactory();
+          EnableFakeMedia(dependencies);
           return dependencies;
         }()) {}
 };

pc/peer_connection_interface_unittest.cc

@@ -22,7 +22,6 @@
 #include "api/audio/audio_mixer.h"
 #include "api/audio_codecs/builtin_audio_decoder_factory.h"
 #include "api/audio_codecs/builtin_audio_encoder_factory.h"
-#include "api/call/call_factory_interface.h"
 #include "api/create_peerconnection_factory.h"
 #include "api/data_channel_interface.h"
 #include "api/enable_media_with_defaults.h"

pc/peer_connection_jsep_unittest.cc

@@ -20,7 +20,6 @@
 
 #include "absl/strings/string_view.h"
 #include "absl/types/optional.h"
-#include "api/call/call_factory_interface.h"
 #include "api/enable_media_with_defaults.h"
 #include "api/field_trials_view.h"
 #include "api/jsep.h"

pc/peer_connection_media_unittest.cc

@@ -27,7 +27,6 @@
 #include "absl/algorithm/container.h"
 #include "absl/types/optional.h"
 #include "api/audio_options.h"
-#include "api/call/call_factory_interface.h"
 #include "api/jsep.h"
 #include "api/media_types.h"
 #include "api/peer_connection_interface.h"
@@ -57,6 +56,7 @@
 #include "pc/rtp_media_utils.h"
 #include "pc/rtp_transceiver.h"
 #include "pc/session_description.h"
+#include "pc/test/enable_fake_media.h"
 #include "pc/test/mock_peer_connection_observers.h"
 #include "rtc_base/checks.h"
 #include "rtc_base/rtc_certificate_generator.h"
@@ -173,8 +173,7 @@ class PeerConnectionMediaBaseTest : public ::testing::Test {
     factory_dependencies.worker_thread = rtc::Thread::Current();
     factory_dependencies.signaling_thread = rtc::Thread::Current();
     factory_dependencies.task_queue_factory = CreateDefaultTaskQueueFactory();
-    factory_dependencies.media_engine = std::move(media_engine);
-    factory_dependencies.call_factory = CreateCallFactory();
+    EnableFakeMedia(factory_dependencies, std::move(media_engine));
     factory_dependencies.event_log_factory =
         std::make_unique<RtcEventLogFactory>(
             factory_dependencies.task_queue_factory.get());

pc/rtp_transceiver_unittest.cc

@@ -19,8 +19,8 @@
 #include "absl/types/optional.h"
 #include "api/peer_connection_interface.h"
 #include "api/rtp_parameters.h"
-#include "media/base/fake_media_engine.h"
 #include "media/base/media_engine.h"
+#include "pc/test/enable_fake_media.h"
 #include "pc/test/mock_channel_interface.h"
 #include "pc/test/mock_rtp_receiver_internal.h"
 #include "pc/test/mock_rtp_sender_internal.h"
@@ -60,7 +60,7 @@ class RtpTransceiverTest : public testing::Test {
     d.network_thread = rtc::Thread::Current();
     d.worker_thread = rtc::Thread::Current();
     d.signaling_thread = rtc::Thread::Current();
-    d.media_engine = std::make_unique<cricket::FakeMediaEngine>();
+    EnableFakeMedia(d);
     return d;
   }
 

pc/test/enable_fake_media.cc

@@ -0,0 +1,61 @@
+/*
+ *  Copyright 2023 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.
+ */
+
+#include "pc/test/enable_fake_media.h"
+
+#include <memory>
+#include <utility>
+
+#include "absl/base/nullability.h"
+#include "api/peer_connection_interface.h"
+#include "call/call.h"
+#include "call/call_config.h"
+#include "media/base/fake_media_engine.h"
+#include "pc/media_factory.h"
+#include "rtc_base/checks.h"
+
+namespace webrtc {
+
+using ::cricket::FakeMediaEngine;
+using ::cricket::MediaEngineInterface;
+
+void EnableFakeMedia(
+    PeerConnectionFactoryDependencies& deps,
+    absl::Nonnull<std::unique_ptr<FakeMediaEngine>> fake_media_engine) {
+  class FakeMediaFactory : public MediaFactory {
+   public:
+    explicit FakeMediaFactory(
+        absl::Nonnull<std::unique_ptr<FakeMediaEngine>> fake)
+        : fake_(std::move(fake)) {}
+
+    std::unique_ptr<Call> CreateCall(const CallConfig& config) override {
+      return Call::Create(config);
+    }
+
+    std::unique_ptr<MediaEngineInterface> CreateMediaEngine(
+        PeerConnectionFactoryDependencies& /*dependencies*/) {
+      RTC_CHECK(fake_ != nullptr)
+          << "CreateMediaEngine can be called at most once.";
+      return std::move(fake_);
+    }
+
+   private:
+    absl::Nullable<std::unique_ptr<FakeMediaEngine>> fake_;
+  };
+
+  deps.media_factory =
+      std::make_unique<FakeMediaFactory>(std::move(fake_media_engine));
+}
+
+void EnableFakeMedia(PeerConnectionFactoryDependencies& deps) {
+  EnableFakeMedia(deps, std::make_unique<cricket::FakeMediaEngine>());
+}
+
+}  // namespace webrtc

pc/test/enable_fake_media.h

@@ -0,0 +1,38 @@
+/*
+ *  Copyright 2023 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.
+ */
+
+// Enables fake media support for PeerConnnectionFactory created from `deps` for
+// testing purposes. Such fake media support ignores media dependencies in the
+// `PeerConnectionFactoryDependencies`. Allows to test PeerConnection and
+// PeerConnectionFactory in the presence of the media, but doesn't test media
+// support itself.
+
+#ifndef PC_TEST_ENABLE_FAKE_MEDIA_H_
+#define PC_TEST_ENABLE_FAKE_MEDIA_H_
+
+#include <memory>
+
+#include "absl/base/nullability.h"
+#include "api/peer_connection_interface.h"
+#include "media/base/fake_media_engine.h"
+
+namespace webrtc {
+
+// Enables media support backed by the 'fake_media_engine'.
+void EnableFakeMedia(
+    PeerConnectionFactoryDependencies& deps,
+    absl::Nonnull<std::unique_ptr<cricket::FakeMediaEngine>> fake_media_engine);
+
+// Enables media support backed by unspecified lightweight fake implementation.
+void EnableFakeMedia(PeerConnectionFactoryDependencies& deps);
+
+}  // namespace webrtc
+
+#endif  //  PC_TEST_ENABLE_FAKE_MEDIA_H_

pc/test/fake_peer_connection_for_stats.h

@@ -18,10 +18,10 @@
 #include <utility>
 #include <vector>
 
-#include "media/base/fake_media_engine.h"
 #include "media/base/media_channel.h"
 #include "pc/channel.h"
 #include "pc/stream_collection.h"
+#include "pc/test/enable_fake_media.h"
 #include "pc/test/fake_data_channel_controller.h"
 #include "pc/test/fake_peer_connection_base.h"
 
@@ -235,7 +235,7 @@ class FakePeerConnectionForStats : public FakePeerConnectionBase {
     dependencies.network_thread = rtc::Thread::Current();
     dependencies.worker_thread = rtc::Thread::Current();
     dependencies.signaling_thread = rtc::Thread::Current();
-    dependencies.media_engine = std::make_unique<cricket::FakeMediaEngine>();
+    EnableFakeMedia(dependencies);
     return dependencies;
   }