if(gtest::is_running)
    ASSERT_TRUE(...);
else
    assert(...);

#ifdef GTEST_ON
    ASSERT_TRUE(...);
#else
    assert(...);
#endif

#pragma once

#include "debug.hpp"

#ifdef UNIT_TESTS
#include <gtest/gtest.h>
#endif

#include <cassert>

#define ASSERT_FAIL_BREAK_ON_ATTACHED_DEBUGGER(exp, precondition)
    if (!(precondition)); else if(!!(exp)); else ::utility::debug_break()

#ifdef GTEST_FAIL

#ifdef _MSC_VER
    #if _MSC_VER < 1600 // < MSVC++ 10 (Visual Studio 2010)
        #error lambda is not supported
    #endif
#else
    #if __cplusplus < 201103L
        #error lambda is not supported
    #endif
#endif

// TIPS:
//  * all labdas captured by reference because of the error in the MSVC 2015:
//    `error C3493 : '...' cannot be implicitly captured because no default capture mode has been specified`
//  * if debugger is attached but `::testing::GTEST_FLAG(break_on_failure)` has not been setted,
//    then an assertion does a post break.

// gtest asserts rebind with the `void` error workaround (C++11 and higher is required)
#undef ASSERT_TRUE
#define ASSERT_TRUE(condition) [&]() -> void { GTEST_TEST_BOOLEAN_((condition), #condition, false, true, GTEST_FATAL_FAILURE_);
    ASSERT_FAIL_BREAK_ON_ATTACHED_DEBUGGER(::utility::is_true(condition), !::testing::GTEST_FLAG(break_on_failure)); }()
#undef ASSERT_FALSE
#define ASSERT_FALSE(condition) [&]() -> void { GTEST_TEST_BOOLEAN_(!(condition), #condition, true, false, GTEST_FATAL_FAILURE_);
    ASSERT_FAIL_BREAK_ON_ATTACHED_DEBUGGER(::utility::is_false(condition), !::testing::GTEST_FLAG(break_on_failure)); }()

#if !GTEST_DONT_DEFINE_ASSERT_EQ
#undef ASSERT_EQ
# define ASSERT_EQ(val1, val2) [&]() -> void { GTEST_ASSERT_EQ(val1, val2);
    ASSERT_FAIL_BREAK_ON_ATTACHED_DEBUGGER(::utility::is_equal(val1, val2), !::testing::GTEST_FLAG(break_on_failure)); }()
#endif

#if !GTEST_DONT_DEFINE_ASSERT_NE
#undef ASSERT_NE
# define ASSERT_NE(val1, val2) [&]() -> void { GTEST_ASSERT_NE(val1, val2);
    ASSERT_FAIL_BREAK_ON_ATTACHED_DEBUGGER(::utility::is_not_equal(val1, val2), !::testing::GTEST_FLAG(break_on_failure)); }()
#endif

#if !GTEST_DONT_DEFINE_ASSERT_LE
#undef ASSERT_LE
# define ASSERT_LE(val1, val2) [&]() -> void { GTEST_ASSERT_LE(val1, val2);
    ASSERT_FAIL_BREAK_ON_ATTACHED_DEBUGGER(::utility::is_less_or_equal(val1, val2), !::testing::GTEST_FLAG(break_on_failure)); }()
#endif

#if !GTEST_DONT_DEFINE_ASSERT_LT
#undef ASSERT_LT
# define ASSERT_LT(val1, val2) [&]() -> void { GTEST_ASSERT_LT(val1, val2);
    ASSERT_FAIL_BREAK_ON_ATTACHED_DEBUGGER(::utility::is_less(val1, val2), !::testing::GTEST_FLAG(break_on_failure)); }()
#endif

#if !GTEST_DONT_DEFINE_ASSERT_GE
#undef ASSERT_GE
# define ASSERT_GE(val1, val2) [&]() -> void { GTEST_ASSERT_GE(val1, val2);
    ASSERT_FAIL_BREAK_ON_ATTACHED_DEBUGGER(::utility::is_greater_or_equal(val1, val2), !::testing::GTEST_FLAG(break_on_failure)); }()
#endif

#if !GTEST_DONT_DEFINE_ASSERT_GT
#undef ASSERT_GT
# define ASSERT_GT(val1, val2) [&]() -> void { GTEST_ASSERT_GT(val1, val2);
    ASSERT_FAIL_BREAK_ON_ATTACHED_DEBUGGER(::utility::is_greater(val1, val2), !::testing::GTEST_FLAG(break_on_failure)); }()
#endif

#define ASSERT(x) ASSERT_TRUE(x)

#else

#ifndef ASSERT_IMPL
#define ASSERT_IMPL(exp) assert(exp)
#endif

#ifdef _DEBUG

#define ASSERT_TRUE(exp) ASSERT_IMPL(exp)
#define ASSERT_FALSE(exp) ASSERT_IMPL(!(exp))

#define ASSERT_EQ(v1, v2) ASSERT_IMPL((v1) == (v2))
#define ASSERT_NE(v1, v2) ASSERT_IMPL((v1) != (v2)))
#define ASSERT_LE(v1, v2) ASSERT_IMPL((v1) <= (v2))
#define ASSERT_LT(v1, v2) ASSERT_IMPL((v1) < (v2))
#define ASSERT_GE(v1, v2) ASSERT_IMPL((v1) > (v2))
#define ASSERT_GT(v1, v2) ASSERT_IMPL((v1) >= (v2))

#define ASSERT(exp) ASSERT_IMPL(exp)

#else

#define ASSERT_TRUE(exp) ::utility::is_true(exp)
#define ASSERT_FALSE(exp) ::utility::is_false(exp)

#define ASSERT_EQ(v1, v2) ::utility::is_equal(v1, v2)
#define ASSERT_NE(v1, v2) ::utility::is_not_equal(v1, v2)
#define ASSERT_LE(v1, v2) ::utility::is_less_or_equal(v1, v2)
#define ASSERT_LT(v1, v2) ::utility::is_less(v1, v2)
#define ASSERT_GE(v1, v2) ::utility::is_greater_or_equal(v1, v2)
#define ASSERT_GT(v1, v2) ::utility::is_greater(v1, v2)

#define ASSERT(exp) ::utility::is_true(exp)

#endif

#endif

namespace utility
{
    // TIPS:
    // * to capture parameters by reference in macro definitions for single evaluation
    // * to suppress `unused variable` warnings like: `warning C4101: '...': unreferenced local variable`
    template<typename T>
    inline bool is_true(const T & v)
    {
        return !!v; // to avoid warnings of truncation to bool
    }

    template<typename T>
    inline bool is_false(const T & v)
    {
        return !v; // to avoid warnings of truncation to bool
    }

    template<typename T1, typename T2>
    inline bool is_equal(const T1 & v1, const T2 & v2)
    {
        return v1 == v2;
    }

    template<typename T1, typename T2>
    inline bool is_not_equal(const T1 & v1, const T2 & v2)
    {
        return v1 != v2;
    }

    template<typename T1, typename T2>
    inline bool is_less_or_equal(const T1 & v1, const T2 & v2)
    {
        return v1 <= v2;
    }

    template<typename T1, typename T2>
    inline bool is_less(const T1 & v1, const T2 & v2)
    {
        return v1 < v2;
    }

    template<typename T1, typename T2>
    inline bool is_greater_or_equal(const T1 & v1, const T2 & v2)
    {
        return v1 >= v2;
    }

    template<typename T1, typename T2>
    inline bool is_greater(const T1 & v1, const T2 & v2)
    {
        return v1 > v2;
    }
}

#pragma once

namespace utility
{
    void debug_break(bool breakCondition = true);
    bool is_under_debugger();
}

#include "debug.hpp"
#include "platform.hpp"

#if defined(UTILITY_PLATFORM_WINDOWS)
#include <windows.h>
#include <intrin.h>
#elif defined(UTILITY_PLATFORM_POSIX)
#include <sys/ptrace.h>
#include <signal.h>
static void signal_handler(int) { }
#else
#error is_under_debugger is not supported for this platform
#endif


namespace utility {

void debug_break(bool breakCondition)
{
    // avoid signal if not under debugger
    if (breakCondition && is_under_debugger()) {
#if defined(UTILITY_COMPILER_CXX_MSC)
        __debugbreak(); // won't require debug symbols to show the call stack, when the DebugBreak() will require system debug symbols to show the call stack correctly
#elif defined(UTILITY_PLATFORM_POSIX)
        signal(SIGTRAP, signal_handler);
#else
#error debug_break is not supported for this platform
#endif
    }
}

bool is_under_debugger()
{
#if defined(UTILITY_PLATFORM_WINDOWS)
    return !!::IsDebuggerPresent();
#elif defined(UTILITY_PLATFORM_POSIX)
    return ptrace(PTRACE_TRACEME, 0, NULL, 0) == -1;
#endif
}

}

#pragma once

// linux, also other platforms (Hurd etc) that use GLIBC, should these really have their own config headers though?
#if defined(linux) || defined(__linux) || defined(__linux__) || defined(__GNU__) || defined(__GLIBC__)
#  define UTILITY_PLATFORM_LINUX
#  define UTILITY_PLATFORM_POSIX
#  if defined(__mcbc__)
#     define UTILITY_PLATFORM_MCBC
#     define UTILITY_PLATFORM_SHORT_NAME "MCBC"
#  elif defined( __astra_linux__ )
#     define UTILITY_PLATFORM_ASTRA_LINUX
#     define UTILITY_PLATFORM_SHORT_NAME "Astra Linux"
#  else
#     define UTILITY_PLATFORM_SHORT_NAME "Linux"
#  endif
#elif defined(__FreeBSD__) || defined(__NetBSD__) || defined(__OpenBSD__) || defined(__DragonFly__) // BSD:
#  define UTILITY_PLATFORM_BSD
#  define UTILITY_PLATFORM_POSIX
#  define UTILITY_PLATFORM_SHORT_NAME "BSD"
#elif defined(sun) || defined(__sun) // solaris:
#  define UTILITY_PLATFORM_SOLARIS
#  define UTILITY_PLATFORM_POSIX
#  define UTILITY_PLATFORM_SHORT_NAME "Solaris"
#elif defined(__CYGWIN__) // cygwin is not win32:
#  define UTILITY_PLATFORM_CYGWIN
#  define UTILITY_PLATFORM_POSIX
#  define UTILITY_PLATFORM_SHORT_NAME "Cygwin"
#elif defined(_WIN32) || defined(__WIN32__) || defined(WIN32) // win32:
#  define UTILITY_PLATFORM_WINDOWS
#  define UTILITY_PLATFORM_SHORT_NAME "Windows"
#  if defined(__MINGW32__)  //  Get the information about the MinGW runtime, i.e. __MINGW32_*VERSION.
#     include <_mingw.h>
#  endif
#elif defined(macintosh) || defined(__APPLE__) || defined(__APPLE_CC__) // MacOS
#  define UTILITY_PLATFORM_APPLE
#  define UTILITY_PLATFORM_POSIX
#  define UTILITY_PLATFORM_SHORT_NAME "MacOS"
#elif defined(__QNXNTO__)  // QNX:
#  define UTILITY_PLATFORM_QNIX
#  define UTILITY_PLATFORM_POSIX
#  define UTILITY_PLATFORM_SHORT_NAME "QNX"
#elif defined(unix) || defined(__unix) || defined(_XOPEN_SOURCE) || defined(_POSIX_SOURCE)
#  define UTILITY_PLATFORM_UNINX
#  define UTILITY_PLATFORM_POSIX
#  define UTILITY_PLATFORM_SHORT_NAME "Unix"
#else
#   error Unknown platform
#endif

#if defined(__GNUC__)
#   define UTILITY_COMPILER_CXX_GCC
#   define UTILITY_COMPILER_CXX "gcc"
#   define UTILITY_COMPILER_CXX_VERSION __GNUC__
#   if __GNUC__ < 4
#     error "Unsuported gcc version"
#   endif
#elif defined(_MSC_VER)
#   define UTILITY_COMPILER_CXX_MSC
#   define UTILITY_COMPILER_CXX "MS VisualC"
#   define UTILITY_COMPILER_CXX_VERSION _MSC_VER
#else
#   error "Unknown compiler"
#endif