#ifndef BOOST_DETAIL_LIGHTWEIGHT_TEST_HPP_INCLUDED
#define BOOST_DETAIL_LIGHTWEIGHT_TEST_HPP_INCLUDED

// MS compatible compilers support #pragma once

#if defined(_MSC_VER) && (_MSC_VER >= 1020)
# pragma once
#endif

//
//  ndnboost/detail/lightweight_test.hpp - lightweight test library
//
//  Copyright (c) 2002, 2009 Peter Dimov
//  Copyright (2) Beman Dawes 2010, 2011
//  Copyright (3) Ion Gaztanaga 2013
//
//  Distributed under the Boost Software License, Version 1.0.
//  See accompanying file LICENSE_1_0.txt or copy at
//  http://www.boost.org/LICENSE_1_0.txt
//
//    ---------------
//
//    If expression is false increases the error count 
//    and outputs a message containing 'expression'
//
//  BOOST_TEST(expression)
//
//    ---------------
//
//    Increases error count and outputs a message containing 'message'
//
//  BOOST_ERROR(message)
//
//    ---------------
//
//    If 'expr1' != 'expr2' increases the error count 
//    and outputs a message containing both expressions
//
//  BOOST_TEST_EQ(expr1, expr2)
//
//    ---------------
//
//    If 'expr1' == 'expr2' increases the error count 
//    and outputs a message containing both expressions
//
//  BOOST_TEST_NE(expr1, expr2)
//
//    ---------------
//
//    If BOOST_NO_EXCEPTIONS is NOT defined and if 'expr' does not
//    throw an exception of type 'excep', increases the error count
//    and outputs a message containing the expression.
//
//    If BOOST_NO_EXCEPTIONS is defined, this macro expands to nothing
//    and 'expr' is not evaluated.
//
//  BOOST_TEST_THROWS(expr, excep)
//
//    ---------------
//
//    Returns the error count
//
//  int ndnboost::report_errors()
//

#include <iostream>
#include <ndnboost/current_function.hpp>
#include <ndnboost/assert.hpp>
#include <ndnboost/detail/no_exceptions_support.hpp>

//  IDE's like Visual Studio perform better if output goes to std::cout or
//  some other stream, so allow user to configure output stream:
#ifndef BOOST_LIGHTWEIGHT_TEST_OSTREAM
# define BOOST_LIGHTWEIGHT_TEST_OSTREAM std::cerr
#endif

namespace ndnboost
{

namespace detail
{

struct report_errors_reminder
{
  bool called_report_errors_function;
  report_errors_reminder() : called_report_errors_function(false) {}
 ~report_errors_reminder()
  {
    BOOST_ASSERT(called_report_errors_function);  // verify report_errors() was called  
  }
};

inline report_errors_reminder& report_errors_remind()
{
  static report_errors_reminder r;
  return r;
}

inline int & test_errors()
{
    static int x = 0;
    report_errors_remind();
    return x;
}

inline void test_failed_impl(char const * expr, char const * file, int line, char const * function)
{
    BOOST_LIGHTWEIGHT_TEST_OSTREAM
      << file << "(" << line << "): test '" << expr << "' failed in function '"
      << function << "'" << std::endl;
    ++test_errors();
}

inline void error_impl(char const * msg, char const * file, int line, char const * function)
{
    BOOST_LIGHTWEIGHT_TEST_OSTREAM
      << file << "(" << line << "): " << msg << " in function '"
      << function << "'" << std::endl;
    ++test_errors();
}

inline void throw_failed_impl(char const * excep, char const * file, int line, char const * function)
{
   BOOST_LIGHTWEIGHT_TEST_OSTREAM
    << file << "(" << line << "): Exception '" << excep << "' not thrown in function '"
    << function << "'" << std::endl;
   ++test_errors();
}

template<class T, class U> inline void test_eq_impl( char const * expr1, char const * expr2,
  char const * file, int line, char const * function, T const & t, U const & u )
{
    if( t == u )
    {
    }
    else
    {
        BOOST_LIGHTWEIGHT_TEST_OSTREAM
            << file << "(" << line << "): test '" << expr1 << " == " << expr2
            << "' failed in function '" << function << "': "
            << "'" << t << "' != '" << u << "'" << std::endl;
        ++test_errors();
    }
}

template<class T, class U> inline void test_ne_impl( char const * expr1, char const * expr2,
  char const * file, int line, char const * function, T const & t, U const & u )
{
    if( t != u )
    {
    }
    else
    {
        BOOST_LIGHTWEIGHT_TEST_OSTREAM
            << file << "(" << line << "): test '" << expr1 << " != " << expr2
            << "' failed in function '" << function << "': "
            << "'" << t << "' == '" << u << "'" << std::endl;
        ++test_errors();
    }
}

} // namespace detail

inline int report_errors()
{
    detail::report_errors_remind().called_report_errors_function = true;

    int errors = detail::test_errors();

    if( errors == 0 )
    {
        BOOST_LIGHTWEIGHT_TEST_OSTREAM
          << "No errors detected." << std::endl;
        return 0;
    }
    else
    {
        BOOST_LIGHTWEIGHT_TEST_OSTREAM
          << errors << " error" << (errors == 1? "": "s") << " detected." << std::endl;
        return 1;
    }
}

} // namespace ndnboost

#define BOOST_TEST(expr) ((expr)? (void)0: ::ndnboost::detail::test_failed_impl(#expr, __FILE__, __LINE__, BOOST_CURRENT_FUNCTION))
#define BOOST_ERROR(msg) ::ndnboost::detail::error_impl(msg, __FILE__, __LINE__, BOOST_CURRENT_FUNCTION)
#define BOOST_TEST_EQ(expr1,expr2) ( ::ndnboost::detail::test_eq_impl(#expr1, #expr2, __FILE__, __LINE__, BOOST_CURRENT_FUNCTION, expr1, expr2) )
#define BOOST_TEST_NE(expr1,expr2) ( ::ndnboost::detail::test_ne_impl(#expr1, #expr2, __FILE__, __LINE__, BOOST_CURRENT_FUNCTION, expr1, expr2) )
#ifndef BOOST_NO_EXCEPTIONS
   #define BOOST_TEST_THROWS( EXPR, EXCEP )                    \
      try {                                                    \
         EXPR;                                                 \
         ::ndnboost::detail::throw_failed_impl                    \
         (#EXCEP, __FILE__, __LINE__, BOOST_CURRENT_FUNCTION); \
      }                                                        \
      catch(EXCEP const&) {                                    \
      }                                                        \
      catch(...) {                                             \
         ::ndnboost::detail::throw_failed_impl                    \
         (#EXCEP, __FILE__, __LINE__, BOOST_CURRENT_FUNCTION); \
      }                                                        \
   //
#else
   #define BOOST_TEST_THROWS( EXPR, EXCEP )
#endif

#endif // #ifndef BOOST_DETAIL_LIGHTWEIGHT_TEST_HPP_INCLUDED