/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
/*
 * Copyright (c) 2009 University of Washington
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation;
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

#include "ns3/test.h"
#include "ns3/traced-callback.h"
#include "ns3/unused.h"

using namespace ns3;

class BasicTracedCallbackTestCase : public TestCase
{
public:
  BasicTracedCallbackTestCase ();
  virtual ~BasicTracedCallbackTestCase () {}

private:
  virtual void DoRun (void);

  void CbOne (uint8_t a, double b);
  void CbTwo (uint8_t a, double b);

  bool m_one;
  bool m_two;
};

BasicTracedCallbackTestCase::BasicTracedCallbackTestCase ()
  : TestCase ("Check basic TracedCallback operation")
{
}

void
BasicTracedCallbackTestCase::CbOne (uint8_t a, double b)
{
  NS_UNUSED (a);
  NS_UNUSED (b);
  m_one = true;
}

void
BasicTracedCallbackTestCase::CbTwo (uint8_t a, double b)
{
  NS_UNUSED (a);
  NS_UNUSED (b);
  m_two = true;
}

void
BasicTracedCallbackTestCase::DoRun (void)
{
  //
  // Create a traced callback and connect it up to our target methods.  All that
  // these methods do is to set corresponding member variables m_one and m_two.
  //
  TracedCallback<uint8_t, double> trace;

  //
  // Connect both callbacks to their respective test methods.  If we hit the 
  // trace, both callbacks should be called and the two variables  should be set
  // to true.
  //
  trace.ConnectWithoutContext (MakeCallback (&BasicTracedCallbackTestCase::CbOne, this));
  trace.ConnectWithoutContext (MakeCallback (&BasicTracedCallbackTestCase::CbTwo, this));
  m_one = false;
  m_two = false;
  trace (1, 2);
  NS_TEST_ASSERT_MSG_EQ (m_one, true, "Callback CbOne not called");
  NS_TEST_ASSERT_MSG_EQ (m_two, true, "Callback CbTwo not called");

  //
  // If we now disconnect callback one then only callback two should be called.
  //
  trace.DisconnectWithoutContext (MakeCallback (&BasicTracedCallbackTestCase::CbOne, this));
  m_one = false;
  m_two = false;
  trace (1, 2);
  NS_TEST_ASSERT_MSG_EQ (m_one, false, "Callback CbOne unexpectedly called");
  NS_TEST_ASSERT_MSG_EQ (m_two, true, "Callback CbTwo not called");

  //
  // If we now disconnect callback two then neither callback should be called.
  //
  trace.DisconnectWithoutContext (MakeCallback (&BasicTracedCallbackTestCase::CbTwo, this));
  m_one = false;
  m_two = false;
  trace (1, 2);
  NS_TEST_ASSERT_MSG_EQ (m_one, false, "Callback CbOne unexpectedly called");
  NS_TEST_ASSERT_MSG_EQ (m_two, false, "Callback CbTwo unexpectedly called");

  //
  // If we connect them back up, then both callbacks should be called.
  //
  trace.ConnectWithoutContext (MakeCallback (&BasicTracedCallbackTestCase::CbOne, this));
  trace.ConnectWithoutContext (MakeCallback (&BasicTracedCallbackTestCase::CbTwo, this));
  m_one = false;
  m_two = false;
  trace (1, 2);
  NS_TEST_ASSERT_MSG_EQ (m_one, true, "Callback CbOne not called");
  NS_TEST_ASSERT_MSG_EQ (m_two, true, "Callback CbTwo not called");
}

class TracedCallbackTestSuite : public TestSuite
{
public:
  TracedCallbackTestSuite ();
};

TracedCallbackTestSuite::TracedCallbackTestSuite ()
  : TestSuite ("traced-callback", UNIT)
{
  AddTestCase (new BasicTracedCallbackTestCase, TestCase::QUICK);
}

static TracedCallbackTestSuite tracedCallbackTestSuite;