Adding ability to simulate EWOULDBLOCK/SignalReadyToSend.

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.
  */
 
@@ skipping 59 matching lines @@
   // Checks that the next packet has the given contents. Returns the remote
   // address that the packet was sent from.
   bool CheckNextPacket(const char* buf, size_t len, SocketAddress* addr);
 
   // Checks that no packets have arrived or will arrive in the next second.
   bool CheckNoPacket();
 
   int GetError();
   int SetOption(Socket::Option opt, int value);
 
-  bool ready_to_send() const;
+  bool ready_to_send() const { return ready_to_send_count() > 0; }
+
+  // How many times SignalReadyToSend has been fired.
+  int ready_to_send_count() const { return ready_to_send_count_; }
 
  private:
   // 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);
 
   CriticalSection crit_;
   AsyncPacketSocket* socket_;
   std::vector<Packet*>* packets_;
-  bool ready_to_send_;
+  int ready_to_send_count_ = 0;
   int64_t prev_packet_timestamp_;
   RTC_DISALLOW_COPY_AND_ASSIGN(TestClient);
 };
 
 }  // namespace rtc
 
 #endif  // WEBRTC_BASE_TESTCLIENT_H_