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// boost timer_test.cpp --------------------------------------------------------------//

// Copyright Beman Dawes 2006, 2011

// Distributed under the Boost Software License, Version 1.0.

// See http://www.boost.org/LICENSE_1_0.txt

// See http://www.boost.org/libs/timer for documentation.

#include <boost/timer/timer.hpp>

#include <boost/detail/lightweight_main.hpp>

#include <boost/detail/lightweight_test.hpp>

#include <cstdlib> // for atol()

#include <iostream>

#include <string>

#include <ctime>

using std::string;

using std::cout;

using std::endl;

using boost::timer::default_places;

using boost::timer::nanosecond_type;

using boost::timer::cpu_times;

using boost::timer::format;

using boost::timer::cpu_timer;

using boost::timer::auto_cpu_timer;

namespace

{

void unit_test()

{

cout << "unit test..." << endl;

string default_format(" %ws wall, %us user + %ss system = %ts CPU (%p%)\n");

// each constructor

auto_cpu_timer t1;

BOOST_TEST(!t1.is_stopped());

// the following, and similar below, are giving false failures on MinGW/gcc

// so comment them out for now

//BOOST_TEST(&t1.ostream() == &cout);

BOOST_TEST_EQ(t1.places(), default_places);

BOOST_TEST_EQ(t1.format_string(), default_format);

t1.stop();

BOOST_TEST(t1.is_stopped());

auto_cpu_timer t1a(t1);

BOOST_TEST(t1a.is_stopped());

BOOST_TEST_EQ(t1a.elapsed().wall, t1.elapsed().wall);

BOOST_TEST_EQ(t1a.elapsed().user, t1.elapsed().user);

BOOST_TEST_EQ(t1a.elapsed().system, t1.elapsed().system);

//BOOST_TEST(&t1a.ostream() == &cout);

BOOST_TEST_EQ(t1a.places(), default_places);

BOOST_TEST_EQ(t1a.format_string(), default_format);

auto_cpu_timer t1b;

BOOST_TEST(!t1b.is_stopped());

t1b = t1;

BOOST_TEST(t1b.is_stopped());

BOOST_TEST_EQ(t1b.elapsed().wall, t1.elapsed().wall);

BOOST_TEST_EQ(t1b.elapsed().user, t1.elapsed().user);

BOOST_TEST_EQ(t1b.elapsed().system, t1.elapsed().system);

//BOOST_TEST(&t1b.ostream() == &cout);

BOOST_TEST_EQ(t1b.places(), default_places);

BOOST_TEST_EQ(t1b.format_string(), default_format);

auto_cpu_timer t2(1);

BOOST_TEST(!t2.is_stopped());

//BOOST_TEST(&t2.ostream() == &cout);

BOOST_TEST_EQ(t2.places(), 1);

BOOST_TEST_EQ(t2.format_string(), default_format);

auto_cpu_timer t3("foo");

BOOST_TEST(!t3.is_stopped());

//BOOST_TEST(&t3.ostream() == &cout);

BOOST_TEST_EQ(t3.places(), default_places);

BOOST_TEST_EQ(t3.format_string(), string("foo"));

auto_cpu_timer t4(1, "foo");

BOOST_TEST(!t4.is_stopped());

//BOOST_TEST(&t4.ostream() == &cout);

BOOST_TEST_EQ(t4.places(), 1);

BOOST_TEST_EQ(t4.format_string(), string("foo"));

auto_cpu_timer t5(std::cerr);

BOOST_TEST(!t5.is_stopped());

BOOST_TEST(&t5.ostream() == &std::cerr);

BOOST_TEST_EQ(t5.places(), default_places);

BOOST_TEST_EQ(t5.format_string(), default_format);

auto_cpu_timer t6(std::cerr, 1);

BOOST_TEST(!t6.is_stopped());

BOOST_TEST(&t6.ostream() == &std::cerr);

BOOST_TEST_EQ(t6.places(), 1);

BOOST_TEST_EQ(t6.format_string(), default_format);

auto_cpu_timer t7(std::cerr, "foo");

BOOST_TEST(!t7.is_stopped());

BOOST_TEST(&t7.ostream() == &std::cerr);

BOOST_TEST_EQ(t7.places(), default_places);

BOOST_TEST_EQ(t7.format_string(), string("foo"));

auto_cpu_timer t8(std::cerr, 1, "foo");

BOOST_TEST(!t8.is_stopped());

BOOST_TEST(&t8.ostream() == &std::cerr);

BOOST_TEST_EQ(t8.places(), 1);

BOOST_TEST_EQ(t8.format_string(), string("foo"));

t1.stop();

t1a.stop();

t1b.stop();

t2.stop();

t3.stop();

t4.stop();

t5.stop();

t6.stop();

t7.stop();

t8.stop();

cout << " unit test complete" << endl;

}

void format_test()

{

cout << "format test..." << endl;

cpu_times times;

times.wall = 5123456789LL;

times.user = 2123456789LL;

times.system = 1234567890LL;

cout << " times.wall is " << times.wall << '\n';

cout << " times.user is " << times.user << '\n';

cout << " times.system is " << times.system << '\n';

cout << " user+system is " << times.user + times.system << '\n';

cout << " format(times, 9) output: " << format(times, 9);

BOOST_TEST_EQ(format(times, 9),

string(" 5.123456789s wall, 2.123456789s user + 1.234567890s system = 3.358024679s CPU (65.5%)\n"));

BOOST_TEST_EQ(format(times, 8),

string(" 5.12345679s wall, 2.12345679s user + 1.23456789s system = 3.35802468s CPU (65.5%)\n"));

BOOST_TEST_EQ(format(times, 7),

string(" 5.1234568s wall, 2.1234568s user + 1.2345679s system = 3.3580247s CPU (65.5%)\n"));

BOOST_TEST_EQ(format(times, 6),

string(" 5.123457s wall, 2.123457s user + 1.234568s system = 3.358025s CPU (65.5%)\n"));

BOOST_TEST_EQ(format(times, 5),

string(" 5.12346s wall, 2.12346s user + 1.23457s system = 3.35802s CPU (65.5%)\n"));

BOOST_TEST_EQ(format(times, 4),

string(" 5.1235s wall, 2.1235s user + 1.2346s system = 3.3580s CPU (65.5%)\n"));

BOOST_TEST_EQ(format(times, 3),

string(" 5.123s wall, 2.123s user + 1.235s system = 3.358s CPU (65.5%)\n"));

BOOST_TEST_EQ(format(times, 2),

string(" 5.12s wall, 2.12s user + 1.23s system = 3.36s CPU (65.5%)\n"));

BOOST_TEST_EQ(format(times, 1),

string(" 5.1s wall, 2.1s user + 1.2s system = 3.4s CPU (65.5%)\n"));

BOOST_TEST_EQ(format(times, 0),

string(" 5s wall, 2s user + 1s system = 3s CPU (65.5%)\n"));

BOOST_TEST_EQ(format(times, 10),

string(" 5.123456789s wall, 2.123456789s user + 1.234567890s system = 3.358024679s CPU (65.5%)\n"));

BOOST_TEST_EQ(format(times, -1),

string(" 5.123457s wall, 2.123457s user + 1.234568s system = 3.358025s CPU (65.5%)\n"));

BOOST_TEST_EQ(format(times),

string(" 5.123457s wall, 2.123457s user + 1.234568s system = 3.358025s CPU (65.5%)\n"));

BOOST_TEST_EQ(format(times, 5, " %w, %u, %s, %t, %%p%"),

string(" 5.12346, 2.12346, 1.23457, 3.35802, %65.5%"));

BOOST_TEST_EQ(format(times, 5, "boo"), string("boo"));

cout << " format test complete" << endl;

}

void std_c_consistency_test()

{

cout << "C library consistency test..." << endl;

// This test is designed to account for C timer resolution and for the possibility

// that another active process may take up a lot of time.

cpu_timer t; // calls start(), so ensures any cpu_timer dll loaded

std::time(0); // ensure any system dll's loaded

std::time_t stop_time, start_time = std::time(0);

// wait until the time() clock ticks

while (std::time(0) == start_time) {}

// start both timers

start_time = std::time(0);

t.start();

// wait until the time() clock ticks again

while (std::time(0) == start_time) {}

// stop both timers

stop_time = std::time(0);

t.stop();

cout << " std::time() elapsed is " << (stop_time - start_time) * 1.0L << " seconds\n";

cout << " cpu_timer wall elapsed is " << t.elapsed().wall / 1000000000.0L << " seconds\n";

cout << " The two clocks whose elapsed time is compared by this test are started\n"

" and stopped one right after the other. If the operating system suspends\n"

" the process in the interim, the test may fail. Thus no single failure\n"

" of this test is meaningful.\n";

// These tests allow lots of fuzz to reduce false positives

BOOST_TEST(t.elapsed().wall / 1000000000.0L > (stop_time - start_time) * 0.75L);

BOOST_TEST(t.elapsed().wall / 1000000000.0L < (stop_time - start_time) * 1.25L);

cout << " C library consistency test complete" << endl;

}

} // unnamed namespace

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

int cpp_main(int, char *[])

{

cout << "---------- timer_test ----------\n";

unit_test();

format_test();

std_c_consistency_test();

return ::boost::report_errors();

}

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