talk/app/webrtc/fakemetricsobserver.h

/*
 * libjingle
 * Copyright 2015 Google Inc.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 *  1. Redistributions of source code must retain the above copyright notice,
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 *  2. Redistributions in binary form must reproduce the above copyright notice,
 *     this list of conditions and the following disclaimer in the documentation
 *     and/or other materials provided with the distribution.
 *  3. The name of the author may not be used to endorse or promote products
 *     derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
 * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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#ifndef TALK_APP_WEBRTC_FAKEMETRICSOBSERVER_H_
#define TALK_APP_WEBRTC_FAKEMETRICSOBSERVER_H_

#include <map>
#include <string>

#include "talk/app/webrtc/peerconnectioninterface.h"
#include "webrtc/base/thread_checker.h"

namespace webrtc {

class FakeMetricsObserver : public MetricsObserverInterface {
 public:
  FakeMetricsObserver();
  void Reset();

  void IncrementEnumCounter(PeerConnectionEnumCounterType,
                            int counter,
                            int counter_max) override;
  void AddHistogramSample(PeerConnectionMetricsName type,
                          int value) override;

  // Accessors to be used by the tests.
  int GetEnumCounter(PeerConnectionEnumCounterType type, int counter) const;
  int GetHistogramSample(PeerConnectionMetricsName type) const;

 protected:
  ~FakeMetricsObserver() {}

 private:
  rtc::ThreadChecker thread_checker_;
  // The vector contains maps for each counter type. In the map, it's a mapping
  // from individual counter to its count, such that it's memory efficient when
  // comes to sparse enum types, like the SSL ciphers in the IANA registry.
  std::vector<std::map<int, int>> counters_;
  int histogram_samples_[kPeerConnectionMetricsName_Max];
};

}  // namespace webrtc

#endif  // TALK_APP_WEBRTC_FAKEMETRICSOBSERVER_H_