Implements RTP header dumping.

chrome/browser/media/webrtc_rtp_dump_handler_unittest.cc

Index: chrome/browser/media/webrtc_rtp_dump_handler_unittest.cc
diff --git a/chrome/browser/media/webrtc_rtp_dump_handler_unittest.cc b/chrome/browser/media/webrtc_rtp_dump_handler_unittest.cc
new file mode 100644
index 0000000000000000000000000000000000000000..c85c52c7fa8913bcd2549674defd336f389aadfe
--- /dev/null
+++ b/chrome/browser/media/webrtc_rtp_dump_handler_unittest.cc
@@ -0,0 +1,275 @@
+// Copyright 2014 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "base/bind.h"
+#include "base/file_util.h"
+#include "base/files/scoped_temp_dir.h"
+#include "base/macros.h"
+#include "base/memory/scoped_ptr.h"
+#include "base/run_loop.h"
+#include "chrome/browser/media/webrtc_rtp_dump_handler.h"
+#include "chrome/browser/media/webrtc_rtp_dump_writer.h"
+#include "content/public/test/test_browser_thread_bundle.h"
+#include "testing/gmock/include/gmock/gmock.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+class FakeDumpWriter : public WebRtcRtpDumpWriter {
+ public:
+  explicit FakeDumpWriter(size_t max_dump_size,
+                          const base::Closure& max_size_reached_callback)
+      : WebRtcRtpDumpWriter(base::FilePath(),
+                            base::FilePath(),
+                            max_dump_size,
+                            base::Closure()),
+        max_dump_size_(max_dump_size),
+        current_dump_size_(0),
+        max_size_reached_callback_(max_size_reached_callback) {}
+
+  virtual void WriteRtpPacket(const uint8* packet_header,
+                              size_t header_length,
+                              size_t packet_length,
+                              bool incoming) OVERRIDE {
+    current_dump_size_ += header_length;
+    if (current_dump_size_ > max_dump_size_)
+      max_size_reached_callback_.Run();
+  }
+
+  virtual void EndDump(bool incoming,
+                       const EndDumpCallback& finished_callback) OVERRIDE {
+    base::MessageLoop::current()->PostTask(FROM_HERE,
+                                           base::Bind(finished_callback, true));
+  }
+
+ private:
+  size_t max_dump_size_;
+  size_t current_dump_size_;
+  base::Closure max_size_reached_callback_;
+};
+
+class WebRtcRtpDumpHandlerTest : public testing::Test {
+ public:
+  WebRtcRtpDumpHandlerTest()
+      : thread_bundle_(content::TestBrowserThreadBundle::IO_MAINLOOP) {
+    ResetDumpHandler(base::FilePath());
+  }
+
+  void ResetDumpHandler(const base::FilePath& dir) {
+    handler_.reset(
+        new WebRtcRtpDumpHandler(dir.empty() ? base::FilePath("dummy") : dir));
+
+    scoped_ptr<WebRtcRtpDumpWriter> writer(new FakeDumpWriter(
+        10,
+        base::Bind(&WebRtcRtpDumpHandler::OnMaxDumpSizeReached,
+                   base::Unretained(handler_.get()))));
+
+    handler_->SetDumpWriterForTesting(writer.Pass());
+  }
+
+  MOCK_METHOD2(OnStopDumpFinished,
+               void(bool success, const std::string& error));
+
+ protected:
+  content::TestBrowserThreadBundle thread_bundle_;
+  scoped_ptr<WebRtcRtpDumpHandler> handler_;
+};
+
+TEST_F(WebRtcRtpDumpHandlerTest, StateTransition) {
+  std::string error;
+
+  WebRtcRtpDumpHandler::PacketType types[3];
+  types[0] = WebRtcRtpDumpHandler::PACKET_TYPE_INCOMING_ONLY;
+  types[1] = WebRtcRtpDumpHandler::PACKET_TYPE_OUTGOING_ONLY;
+  types[2] = WebRtcRtpDumpHandler::PACKET_TYPE_BOTH;
+
+  WebRtcRtpDumpHandler::ReleasedDumps dumps;
+  for (size_t i = 0; i < arraysize(types); ++i) {
+    DVLOG(2) << "Verifying state transition: type = " << types[i];
+
+    // Only StartDump is allowed in STATE_NONE.
+    EXPECT_CALL(*this, OnStopDumpFinished(false, testing::_));
+    handler_->StopDump(types[i],
+                       base::Bind(&WebRtcRtpDumpHandlerTest::OnStopDumpFinished,
+                                  base::Unretained(this)));
+
+    dumps = handler_->ReleaseDumps();
+    EXPECT_TRUE(dumps.incoming_dump_path.empty());
+    EXPECT_TRUE(dumps.outgoing_dump_path.empty());
+
+    EXPECT_TRUE(handler_->StartDump(types[i], &error));
+    base::RunLoop().RunUntilIdle();
+
+    // Only StopDump is allowed in STATE_STARTED.
+    EXPECT_FALSE(handler_->StartDump(types[i], &error));
+
+    dumps = handler_->ReleaseDumps();
+    EXPECT_TRUE(dumps.incoming_dump_path.empty());
+    EXPECT_TRUE(dumps.outgoing_dump_path.empty());
+
+    EXPECT_CALL(*this, OnStopDumpFinished(true, testing::_));
+    handler_->StopDump(types[i],
+                       base::Bind(&WebRtcRtpDumpHandlerTest::OnStopDumpFinished,
+                                  base::Unretained(this)));
+    base::RunLoop().RunUntilIdle();
+
+    // Only ReleaseDump is allowed in STATE_STOPPED.
+    EXPECT_FALSE(handler_->StartDump(types[i], &error));
+
+    EXPECT_CALL(*this, OnStopDumpFinished(false, testing::_));
+    handler_->StopDump(types[i],
+                       base::Bind(&WebRtcRtpDumpHandlerTest::OnStopDumpFinished,
+                                  base::Unretained(this)));
+
+    dumps = handler_->ReleaseDumps();
+    if (WebRtcRtpDumpHandler::TypeContainsIncoming(types[i]))
+      EXPECT_FALSE(dumps.incoming_dump_path.empty());
+
+    if (WebRtcRtpDumpHandler::TypeContainsOutgoing(types[i]))
+      EXPECT_FALSE(dumps.outgoing_dump_path.empty());
+
+    base::RunLoop().RunUntilIdle();
+    ResetDumpHandler(base::FilePath());
+  }
+}
+
+TEST_F(WebRtcRtpDumpHandlerTest, StoppedWhenMaxSizeReached) {
+  std::string error;
+
+  EXPECT_TRUE(handler_->StartDump(
+      WebRtcRtpDumpHandler::PACKET_TYPE_INCOMING_ONLY, &error));
+
+  std::vector<uint8> buffer(100, 0);
+  handler_->OnRtpPacket(buffer.data(), buffer.size(), buffer.size(), true);
+  base::RunLoop().RunUntilIdle();
+
+  // Dumping should have been stopped, so ready to release.
+  WebRtcRtpDumpHandler::ReleasedDumps dumps = handler_->ReleaseDumps();
+  EXPECT_FALSE(dumps.incoming_dump_path.empty());
+}
+
+TEST_F(WebRtcRtpDumpHandlerTest, PacketIgnoredIfDumpingNotStarted) {
+  std::vector<uint8> buffer(100, 0);
+  handler_->OnRtpPacket(buffer.data(), buffer.size(), buffer.size(), true);
+  handler_->OnRtpPacket(buffer.data(), buffer.size(), buffer.size(), false);
+  base::RunLoop().RunUntilIdle();
+}
+
+TEST_F(WebRtcRtpDumpHandlerTest, PacketIgnoredIfDumpingStopped) {
+  std::string error;
+
+  EXPECT_TRUE(handler_->StartDump(
+      WebRtcRtpDumpHandler::PACKET_TYPE_INCOMING_ONLY, &error));
+
+  EXPECT_CALL(*this, OnStopDumpFinished(true, testing::_));
+  handler_->StopDump(WebRtcRtpDumpHandler::PACKET_TYPE_INCOMING_ONLY,
+                     base::Bind(&WebRtcRtpDumpHandlerTest::OnStopDumpFinished,
+                                base::Unretained(this)));
+
+  std::vector<uint8> buffer(100, 0);
+  handler_->OnRtpPacket(buffer.data(), buffer.size(), buffer.size(), true);
+  base::RunLoop().RunUntilIdle();
+}
+
+TEST_F(WebRtcRtpDumpHandlerTest, CannotStartMoreThanFiveDumps) {
+  std::string error;
+
+  handler_.reset();
+
+  scoped_ptr<WebRtcRtpDumpHandler> handlers[6];
+
+  for (size_t i = 0; i < arraysize(handlers); ++i) {
+    handlers[i].reset(new WebRtcRtpDumpHandler(base::FilePath()));
+
+    if (i < arraysize(handlers) - 1) {
+      EXPECT_TRUE(handlers[i]->StartDump(
+          WebRtcRtpDumpHandler::PACKET_TYPE_INCOMING_ONLY, &error));
+    } else {
+      EXPECT_FALSE(handlers[i]->StartDump(
+          WebRtcRtpDumpHandler::PACKET_TYPE_INCOMING_ONLY, &error));
+    }
+  }
+}
+
+TEST_F(WebRtcRtpDumpHandlerTest, StartStopIncomingThenStartStopOutgoing) {
+  std::string error;
+
+  EXPECT_CALL(*this, OnStopDumpFinished(true, testing::_)).Times(2);
+
+  EXPECT_TRUE(handler_->StartDump(
+      WebRtcRtpDumpHandler::PACKET_TYPE_INCOMING_ONLY, &error));
+  handler_->StopDump(WebRtcRtpDumpHandler::PACKET_TYPE_INCOMING_ONLY,
+                     base::Bind(&WebRtcRtpDumpHandlerTest::OnStopDumpFinished,
+                                base::Unretained(this)));
+
+  EXPECT_TRUE(handler_->StartDump(
+      WebRtcRtpDumpHandler::PACKET_TYPE_OUTGOING_ONLY, &error));
+  handler_->StopDump(WebRtcRtpDumpHandler::PACKET_TYPE_OUTGOING_ONLY,
+                     base::Bind(&WebRtcRtpDumpHandlerTest::OnStopDumpFinished,
+                                base::Unretained(this)));
+
+  base::RunLoop().RunUntilIdle();
+}
+
+TEST_F(WebRtcRtpDumpHandlerTest, StartIncomingStartOutgoingThenStopBoth) {
+  std::string error;
+
+  EXPECT_CALL(*this, OnStopDumpFinished(true, testing::_));
+
+  EXPECT_TRUE(handler_->StartDump(
+      WebRtcRtpDumpHandler::PACKET_TYPE_INCOMING_ONLY, &error));
+  EXPECT_TRUE(handler_->StartDump(
+      WebRtcRtpDumpHandler::PACKET_TYPE_OUTGOING_ONLY, &error));
+
+  handler_->StopDump(WebRtcRtpDumpHandler::PACKET_TYPE_INCOMING_ONLY,
+                     base::Bind(&WebRtcRtpDumpHandlerTest::OnStopDumpFinished,
+                                base::Unretained(this)));
+
+  base::RunLoop().RunUntilIdle();
+}
+
+TEST_F(WebRtcRtpDumpHandlerTest, StartBothThenStopIncomingStopOutgoing) {
+  std::string error;
+
+  EXPECT_CALL(*this, OnStopDumpFinished(true, testing::_)).Times(2);
+
+  EXPECT_TRUE(
+      handler_->StartDump(WebRtcRtpDumpHandler::PACKET_TYPE_BOTH, &error));
+
+  handler_->StopDump(WebRtcRtpDumpHandler::PACKET_TYPE_INCOMING_ONLY,
+                     base::Bind(&WebRtcRtpDumpHandlerTest::OnStopDumpFinished,
+                                base::Unretained(this)));
+  handler_->StopDump(WebRtcRtpDumpHandler::PACKET_TYPE_OUTGOING_ONLY,
+                     base::Bind(&WebRtcRtpDumpHandlerTest::OnStopDumpFinished,
+                                base::Unretained(this)));
+
+  base::RunLoop().RunUntilIdle();
+}
+
+TEST_F(WebRtcRtpDumpHandlerTest, DumpsCleanedUpIfNotReleased) {
+  base::ScopedTempDir temp_dir;
+  ASSERT_TRUE(temp_dir.CreateUniqueTempDir());
+
+  ResetDumpHandler(temp_dir.path());
+
+  base::FilePath incoming_dump = temp_dir.path().AppendASCII("recv");
+  base::FilePath outgoing_dump = temp_dir.path().AppendASCII("send");
+  const char dummy[] = "dummy";
+  EXPECT_GT(base::WriteFile(incoming_dump, dummy, arraysize(dummy)), 0);
+  EXPECT_GT(base::WriteFile(outgoing_dump, dummy, arraysize(dummy)), 0);
+
+  std::string error;
+  EXPECT_TRUE(
+      handler_->StartDump(WebRtcRtpDumpHandler::PACKET_TYPE_BOTH, &error));
+
+  EXPECT_CALL(*this, OnStopDumpFinished(true, testing::_));
+  handler_->StopDump(WebRtcRtpDumpHandler::PACKET_TYPE_BOTH,
+                     base::Bind(&WebRtcRtpDumpHandlerTest::OnStopDumpFinished,
+                                base::Unretained(this)));
+  base::RunLoop().RunUntilIdle();
+
+  handler_.reset();
+  base::RunLoop().RunUntilIdle();
+
+  EXPECT_FALSE(base::PathExists(incoming_dump));
+  EXPECT_FALSE(base::PathExists(outgoing_dump));
+}