rtcp::ReceiverReport moved into own file and got Parse function

webrtc/modules/rtp_rtcp/source/rtcp_packet/receiver_report_unittest.cc

+/*
+ *  Copyright (c) 2015 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/rtcp_packet/receiver_report.h"
+
+#include "testing/gtest/include/gtest/gtest.h"
+
+using webrtc::rtcp::RawPacket;
+using webrtc::rtcp::ReceiverReport;
+using webrtc::rtcp::ReportBlock;
+using webrtc::RTCPUtility::RtcpCommonHeader;
+using webrtc::RTCPUtility::RtcpParseCommonHeader;
+
+namespace webrtc {
+namespace {
+const uint32_t kSenderSsrc = 0x12345678;
+const uint32_t kRemoteSsrc = 0x23456789;
+const uint8_t kFractionLost = 55;
+const uint32_t kCumulativeLost = 0x111213;
+const uint32_t kExtHighestSeqNum = 0x22232425;
+const uint32_t kJitter = 0x33343536;
+const uint32_t kLastSr = 0x44454647;
+const uint32_t kDelayLastSr = 0x55565758;
+// Manually created ReceiverReport with one ReportBlock matching constants
+// above.
+// Having this block allows to test Create and Parse separately.
+const uint8_t kPacket[] = {0x81, 201,  0x00, 0x07, 0x12, 0x34, 0x56, 0x78,
+                           0x23, 0x45, 0x67, 0x89, 55,   0x11, 0x12, 0x13,
+                           0x22, 0x23, 0x24, 0x25, 0x33, 0x34, 0x35, 0x36,
+                           0x44, 0x45, 0x46, 0x47, 0x55, 0x56, 0x57, 0x58};
+const size_t kPacketLength = sizeof(kPacket);
+
+class RtcpPacketReceiverReportTest : public ::testing::Test {
+ protected:
+  void BuildPacket() { packet = rr.Build().Pass(); }
+  void ParsePacket() {
+    RtcpCommonHeader header;
+    EXPECT_TRUE(
+        RtcpParseCommonHeader(packet->Buffer(), packet->Length(), &header));
+    EXPECT_EQ(header.BlockSize(), packet->Length());
+    EXPECT_TRUE(parsed_.Parse(
+        header, packet->Buffer() + RtcpCommonHeader::kHeaderSizeBytes));
+  }
+
+  ReceiverReport rr;
+  rtc::scoped_ptr<RawPacket> packet;
+  const ReceiverReport& parsed() { return parsed_; }
+
+ private:
+  ReceiverReport parsed_;
+};
+
+TEST_F(RtcpPacketReceiverReportTest, Parse) {
+  RtcpCommonHeader header;
+  RtcpParseCommonHeader(kPacket, kPacketLength, &header);
+  EXPECT_TRUE(rr.Parse(header, kPacket + RtcpCommonHeader::kHeaderSizeBytes));
+  const ReceiverReport& parsed = rr;
+
+  EXPECT_EQ(kSenderSsrc, parsed.sender_ssrc());
+  EXPECT_EQ(1u, parsed.report_blocks().size());
+  const ReportBlock& rb = parsed.report_blocks().front();
+  EXPECT_EQ(kRemoteSsrc, rb.source_ssrc());
+  EXPECT_EQ(kFractionLost, rb.fraction_lost());
+  EXPECT_EQ(kCumulativeLost, rb.cumulative_lost());
+  EXPECT_EQ(kExtHighestSeqNum, rb.extended_high_seq_num());
+  EXPECT_EQ(kJitter, rb.jitter());
+  EXPECT_EQ(kLastSr, rb.last_sr());
+  EXPECT_EQ(kDelayLastSr, rb.delay_since_last_sr());
+}
+
+TEST_F(RtcpPacketReceiverReportTest, ParseFailsOnIncorrectSize) {
+  RtcpCommonHeader header;
+  RtcpParseCommonHeader(kPacket, kPacketLength, &header);
+  header.count_or_format++;  // Damage the packet.
+  EXPECT_FALSE(rr.Parse(header, kPacket + RtcpCommonHeader::kHeaderSizeBytes));
+}
+
+TEST_F(RtcpPacketReceiverReportTest, Create) {
+  rr.From(kSenderSsrc);
+  ReportBlock rb;
+  rb.To(kRemoteSsrc);
+  rb.WithFractionLost(kFractionLost);
+  rb.WithCumulativeLost(kCumulativeLost);
+  rb.WithExtHighestSeqNum(kExtHighestSeqNum);
+  rb.WithJitter(kJitter);
+  rb.WithLastSr(kLastSr);
+  rb.WithDelayLastSr(kDelayLastSr);
+  rr.WithReportBlock(rb);
+
+  BuildPacket();
+
+  ASSERT_EQ(kPacketLength, packet->Length());
+  EXPECT_EQ(0, memcmp(kPacket, packet->Buffer(), kPacketLength));
+}
+
+TEST_F(RtcpPacketReceiverReportTest, WithoutReportBlocks) {
+  rr.From(kSenderSsrc);
+
+  BuildPacket();
+  ParsePacket();
+
+  EXPECT_EQ(kSenderSsrc, parsed().sender_ssrc());
+  EXPECT_EQ(0u, parsed().report_blocks().size());
+}
+
+TEST_F(RtcpPacketReceiverReportTest, WithTwoReportBlocks) {
+  ReportBlock rb1;
+  rb1.To(kRemoteSsrc);
+  ReportBlock rb2;
+  rb2.To(kRemoteSsrc + 1);
+
+  rr.From(kSenderSsrc);
+  EXPECT_TRUE(rr.WithReportBlock(rb1));
+  EXPECT_TRUE(rr.WithReportBlock(rb2));
+
+  BuildPacket();
+  ParsePacket();
+
+  EXPECT_EQ(kSenderSsrc, parsed().sender_ssrc());
+  EXPECT_EQ(2u, parsed().report_blocks().size());
+  EXPECT_EQ(kRemoteSsrc, parsed().report_blocks()[0].source_ssrc());
+  EXPECT_EQ(kRemoteSsrc + 1, parsed().report_blocks()[1].source_ssrc());
+}
+
+TEST_F(RtcpPacketReceiverReportTest, WithTooManyReportBlocks) {
+  rr.From(kSenderSsrc);
+  const size_t kMaxReportBlocks = (1 << 5) - 1;
+  ReportBlock rb;
+  for (size_t i = 0; i < kMaxReportBlocks; ++i) {
+    rb.To(kRemoteSsrc + i);
+    EXPECT_TRUE(rr.WithReportBlock(rb));
+  }
+  rb.To(kRemoteSsrc + kMaxReportBlocks);
+  EXPECT_FALSE(rr.WithReportBlock(rb));
+}
+
+}  // namespace
+}  // namespace webrtc