TimerTest.h

// Mantid Repository : https://github.com/mantidproject/mantid
//
// Copyright &copy; 2018 ISIS Rutherford Appleton Laboratory UKRI,
//     NScD Oak Ridge National Laboratory, European Spallation Source
//     & Institut Laue - Langevin
// SPDX - License - Identifier: GPL - 3.0 +
#ifndef TIMERTEST_H_
#define TIMERTEST_H_

#include "MantidKernel/Timer.h"
#include <cxxtest/TestSuite.h>
#ifdef _WIN32
#include <Windows.h>
#else
#include <unistd.h>
#endif

class TimerTest : public CxxTest::TestSuite {
public:
  void testTimer() {
    // Instantiating the object starts the timer
    Mantid::Kernel::Timer timer;
#if defined _WIN64
    Sleep(200);
    TS_ASSERT_LESS_THAN(0.18, timer.elapsed());
#elif defined _WIN32
    // 32-bit windows doesn't seem to have brilliant resolution
    // as the Sleep(200) can quite often cause the elapsed
    // time to be less than 0.19 seconds!
    Sleep(200);
    TS_ASSERT_LESS_THAN(0.18, timer.elapsed());
#else
    usleep(200000);
    TS_ASSERT_LESS_THAN(0.18, timer.elapsed());
#endif

// Calling elapsed above should reset the timer
#ifdef _WIN32
    Sleep(100);
    TS_ASSERT_LESS_THAN(0.08, timer.elapsed());
#else
    usleep(100000);
    TS_ASSERT_LESS_THAN(0.08, timer.elapsed());
#endif
  }
};

#endif /*TIMERTEST_H_*/