#include "Timer.h"

#define BOOST_TEST_MODULE TimerTest
#include <boost/test/unit_test.hpp>

#include <string>
#include <iostream>
#include <unistd.h>

BOOST_AUTO_TEST_CASE(timer_basic_test) {
  Timer timer;
  const int sleep_time_microsec = 40; // ad-hoc microseconds to pass unit tests.

  timer.start();
  BOOST_REQUIRE(timer.is_running());
  BOOST_REQUIRE(usleep(sleep_time_microsec) == 0);
  // BOOST_CHECK(timer.get_elapsed_cpu_time() > 0.0);
  // BOOST_CHECK(timer.get_elapsed_cpu_time_microseconds() > 0);
  BOOST_CHECK(timer.get_elapsed_wall_time() > 0.0);
  BOOST_CHECK(timer.get_elapsed_wall_time_microseconds() > 0);

  timer.restart();
  BOOST_REQUIRE(timer.is_running());
  BOOST_REQUIRE(usleep(sleep_time_microsec) == 0);
  // BOOST_CHECK(timer.get_elapsed_cpu_time() > 0.0);
  // BOOST_CHECK(timer.get_elapsed_cpu_time_microseconds() > 0);
  BOOST_CHECK(timer.get_elapsed_wall_time() > 0.0);
  BOOST_CHECK(timer.get_elapsed_wall_time_microseconds() > 0);

  const std::string s = timer.ToString();
  BOOST_CHECK(!s.empty());
}

#include "Timer.h"

#define BOOST_TEST_MODULE TimerTest
#include <boost/test/unit_test.hpp>

#include <string>
#include <unistd.h>

BOOST_AUTO_TEST_CASE(timer_basic_test) {
  Timer timer;
  const int sleep_time_microsec = 40; // ad-hoc microseconds to pass unit tests.

  timer.start();
  BOOST_REQUIRE(timer.is_running());
  BOOST_REQUIRE(usleep(sleep_time_microsec) == 0);
  BOOST_CHECK(timer.get_elapsed_wall_time() > 0.0);
  BOOST_CHECK(timer.get_elapsed_wall_time_microseconds() > 0);

  timer.restart();
  BOOST_REQUIRE(timer.is_running());
  BOOST_REQUIRE(usleep(sleep_time_microsec) == 0);
  BOOST_CHECK(timer.get_elapsed_wall_time() > 0.0);
  BOOST_CHECK(timer.get_elapsed_wall_time_microseconds() > 0);

  const std::string s = timer.ToString();
  BOOST_CHECK(!s.empty());
}

Delete assertions to check elapsed CPU time.
Delete assertions to check elapsed CPU time.

The accuracy of getrusage() is limited by the resolution
of software clock as described in
http://www.kernel.org/doc/man-pages/online/pages/man7/time.7.html

The assertions required a timer with microsecond accuracy.
However, we don't necessarily want the timer, and we don't
want to add some time-consuming processes to the test code because
we normally build programs again and again, which means
we want to run unit tests as quickly as possible.
