Update VirtualSocketServerTest to use a fake clock.

webrtc/base/testclient.h

 /*
  *  Copyright 2004 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.
  */
 
 #ifndef WEBRTC_BASE_TESTCLIENT_H_
 #define WEBRTC_BASE_TESTCLIENT_H_
 
 #include <memory>
 #include <vector>
 #include "webrtc/base/asyncudpsocket.h"
 #include "webrtc/base/constructormagic.h"
 #include "webrtc/base/criticalsection.h"
+#include "webrtc/base/fakeclock.h"
 
 namespace rtc {
 
 // A simple client that can send TCP or UDP data and check that it receives
 // what it expects to receive. Useful for testing server functionality.
 class TestClient : public sigslot::has_slots<> {
  public:
   // Records the contents of a packet that was received.
   struct Packet {
     Packet(const SocketAddress& a,
            const char* b,
            size_t s,
            const PacketTime& packet_time);
     Packet(const Packet& p);
     virtual ~Packet();
 
     SocketAddress addr;
     char*  buf;
     size_t size;
     PacketTime packet_time;
   };
 
   // Default timeout for NextPacket reads.
   static const int kTimeoutMs = 5000;
 
   // Creates a client that will send and receive with the given socket and
   // will post itself messages with the given thread.
   explicit TestClient(std::unique_ptr<AsyncPacketSocket> socket);
+  // Create a test client that will use a fake clock. NextPacket needs to wait
+  // for a packet to be received, and thus it needs to advance the fake clock
+  // if the test is using one, rather than just sleeping.
+  TestClient(std::unique_ptr<AsyncPacketSocket> socket, FakeClock* fake_clock);
   ~TestClient() override;
 
   SocketAddress address() const { return socket_->GetLocalAddress(); }
   SocketAddress remote_address() const { return socket_->GetRemoteAddress(); }
 
   // Checks that the socket moves to the specified connect state.
   bool CheckConnState(AsyncPacketSocket::State state);
 
   // Checks that the socket is connected to the remote side.
   bool CheckConnected() {
@@ skipping 29 matching lines @@
   // Timeout for reads when no packet is expected.
   static const int kNoPacketTimeoutMs = 1000;
   // Workaround for the fact that AsyncPacketSocket::GetConnState doesn't exist.
   Socket::ConnState GetState();
   // Slot for packets read on the socket.
   void OnPacket(AsyncPacketSocket* socket, const char* buf, size_t len,
                 const SocketAddress& remote_addr,
                 const PacketTime& packet_time);
   void OnReadyToSend(AsyncPacketSocket* socket);
   bool CheckTimestamp(int64_t packet_timestamp);
+  void AdvanceTime(int ms);
 
+  FakeClock* fake_clock_ = nullptr;
   CriticalSection crit_;
   std::unique_ptr<AsyncPacketSocket> socket_;
   std::vector<std::unique_ptr<Packet>> packets_;
   int ready_to_send_count_ = 0;
   int64_t prev_packet_timestamp_;
   RTC_DISALLOW_COPY_AND_ASSIGN(TestClient);
 };
 
 }  // namespace rtc
 
 #endif  // WEBRTC_BASE_TESTCLIENT_H_