/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */

/*

 * Copyright (c) 2012 Lawrence Livermore National Laboratory

 *

 * 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

 *

 * Author: Peter D. Barnes, Jr. <pdbarnes@llnl.gov>

 */

#include <iomanip>

#include <string>

#include "ns3/test.h"

#include "ns3/hash.h"

namespace ns3 {

//----------------------------

//

// Test default hash on fixed string

class HashFoxTestCase : public TestCase

{

public:

  HashFoxTestCase ();

  virtual ~HashFoxTestCase ();

private:

  virtual void DoRun (void);

};

HashFoxTestCase::HashFoxTestCase ()

  : TestCase ("Check default Hash on a known string")

{

}

HashFoxTestCase::~HashFoxTestCase ()

{

}

void

HashFoxTestCase::DoRun (void)

{

  std::string key("The quick brown fox.");

  uint32_t h32r = 0xd138bc62;  // murmur3(key)

  uint32_t h32 = Hash32 (key);

  NS_TEST_ASSERT_MSG_EQ (h32, h32r,

                         "Hash32 produced " << std::hex << std::setw ( 8) << h32

                         << ", expected "   << std::hex << std::setw ( 8) << h32r

                         );

  uint64_t h64r = 0xfc30fb5d90d6e3a9;

  uint64_t h64 = Hash64 (key);

  NS_TEST_ASSERT_MSG_EQ (h64, h64r,

                         "Hash64 produced " << std::hex << std::setw (16) << h64

                         << ", expected "   << std::hex << std::setw (16) << h64r

                         );

}

//----------------------------

//

// Test FNV hash on fixed string

class HashFnv1aTestCase : public TestCase

{

public:

  HashFnv1aTestCase ();

  virtual ~HashFnv1aTestCase ();

private:

  virtual void DoRun (void);

};

HashFnv1aTestCase::HashFnv1aTestCase ()

  : TestCase ("Check FNV1A Hash on a known string")

{

}

HashFnv1aTestCase::~HashFnv1aTestCase ()

{

}

void

HashFnv1aTestCase::DoRun (void)

{

  std::string key("The quick brown fnv1a.");

  Hash hasher = Hash ( Create<HashFunction::Fnv1a> () );

  uint32_t h32r = 0x5735855b;  // FNV1A(key)

  NS_TEST_ASSERT_MSG_EQ (h32, h32r,

                         "Hash32 produced " << std::hex << std::setw ( 8) << h32

                         << ", expected "   << std::hex << std::setw ( 8) << h32r

                         );

  uint64_t h64r = 0x6fb0aea4ad83c27b;

  NS_TEST_ASSERT_MSG_EQ (h64, h64r,

                         "Hash64 produced " << std::hex << std::setw (16) << h64

                         << ", expected "   << std::hex << std::setw (16) << h64r

                         );

}

//----------------------------

//

// Test Murmur3 hash on fixed string

class HashMurmur3TestCase : public TestCase

{

public:

  HashMurmur3TestCase ();

  virtual ~HashMurmur3TestCase ();

private:

  virtual void DoRun (void);

};

HashMurmur3TestCase::HashMurmur3TestCase ()

  : TestCase ("Check Murmur3 Hash on a known string")

{

}

HashMurmur3TestCase::~HashMurmur3TestCase ()

{

}

void

HashMurmur3TestCase::DoRun (void)

{

  std::string key("The quick brown murmur3.");

  Hash hasher = Hash ( Create<HashFunction::Murmur3> () );

  uint32_t h32r = 0xe8a2d100;  // Murmur3(key)

  NS_TEST_ASSERT_MSG_EQ (h32, h32r,

                         "Hash32 produced " << std::hex << std::setw ( 8) << h32

                         << ", expected "   << std::hex << std::setw ( 8) << h32r

                         );

  uint64_t h64r = 0x95373d091a691071;

  NS_TEST_ASSERT_MSG_EQ (h64, h64r,

                         "Hash64 produced " << std::hex << std::setw (16) << h64

                         << ", expected "   << std::hex << std::setw (16) << h64r

                         );

}

//----------------------------

//

// Hash tester

class HashTestSuite : public TestSuite

{

public:

  HashTestSuite ();

};

HashTestSuite::HashTestSuite ()

  : TestSuite ("hash", UNIT)

{

  AddTestCase (new HashFoxTestCase);

  AddTestCase (new HashFnv1aTestCase);

  AddTestCase (new HashMurmur3TestCase);

}

static HashTestSuite g_hashTestSuite;  

}  // namespace ns3