[Draft] RTCP Parser sketched.

webrtc/modules/rtp_rtcp/source/sample_parser_unittest1.cc

+/*
+ *  Copyright (c) 2016 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 "webrtc/modules/rtp_rtcp/source/sample_rtcp_parser1.h"
+
+#include "testing/gmock/include/gmock/gmock.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+#include "webrtc/modules/rtp_rtcp/source/rtcp_packet/compound_packet.h"
+#include "webrtc/modules/rtp_rtcp/source/rtcp_packet/receiver_report.h"
+
+using ::testing::_;
+using ::testing::Return;
+using ::testing::StrictMock;
+using ::webrtc::rtcp::App;
+using ::webrtc::rtcp::Bye;
+using ::webrtc::rtcp::CommonHeader;
+using ::webrtc::rtcp::CompoundPacket;
+using ::webrtc::rtcp::Parser1;
+using ::webrtc::rtcp::Pli;
+using ::webrtc::rtcp::ReceiverReport;
+
+namespace webrtc {
+
+class MockParserHandler : public Parser1::Handler {
+ public:
+  MOCK_METHOD1(HandleApp, bool(const App&));
+  MOCK_METHOD1(HandleBye, bool(const Bye&));
+  MOCK_METHOD1(HandlePli, bool(const Pli&));
+  MOCK_METHOD1(HandleUnknown, void(const CommonHeader&));
+  MOCK_METHOD0(HandleInvalid, void());
+};
+
+TEST(RtcpParser1, ThreePacketsAndUnknown) {
+  CompoundPacket compound;
+  App app;
+  Bye bye;
+  Pli pli;
+  ReceiverReport report;
+  compound.Append(&app);
+  compound.Append(&bye);
+  compound.Append(&pli);
+  compound.Append(&report);
+  auto raw = compound.Build();
+
+  StrictMock<MockParserHandler> handler;
+  EXPECT_CALL(handler, HandleApp(_)).Times(1).WillRepeatedly(Return(true));
+  EXPECT_CALL(handler, HandleBye(_)).Times(1).WillRepeatedly(Return(true));
+  EXPECT_CALL(handler, HandlePli(_)).Times(1).WillRepeatedly(Return(true));
+  EXPECT_CALL(handler, HandleUnknown(_)).Times(1);
+  Parser1::Parse(raw.data(), raw.size(), &handler);
+}
+
+TEST(RtcpParser1, InvalidParseCallsHandleUnknown) {
+  CompoundPacket compound;
+  Bye bye;
+  Pli pli;
+  compound.Append(&bye);
+  compound.Append(&pli);
+  auto raw = compound.Build();
+  // Damage Bye packet: increase ssrc count by 1.
+  raw[0]++;
+
+  StrictMock<MockParserHandler> handler;
+  EXPECT_CALL(handler, HandleBye(_)).Times(0);
+  EXPECT_CALL(handler, HandlePli(_)).Times(1).WillRepeatedly(Return(true));
+  EXPECT_CALL(handler, HandleUnknown(_)).Times(1);
+  Parser1::Parse(raw.data(), raw.size(), &handler);
+}
+
+}  // namespace webrtc