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/* test_generate_canonical.cpp
*
* Copyright Steven Watanabe 2011
* 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)
*
* $Id$
*
*/
#include <boost/random/generate_canonical.hpp>
#include <boost/random/linear_congruential.hpp>
#include <boost/random/mersenne_twister.hpp>
#include <boost/random/lagged_fibonacci.hpp>
#include <boost/cstdint.hpp>
#include <boost/mpl/vector.hpp>
#define BOOST_TEST_MAIN
#include <boost/test/unit_test.hpp>
typedef boost::mpl::vector<
boost::random::minstd_rand,
boost::random::mt19937,
boost::random::lagged_fibonacci607
> engines;
BOOST_AUTO_TEST_CASE_TEMPLATE(test_float, Engine, engines)
{
Engine eng;
Engine expected;
for(int i = 0; i < 1000; ++i) {
float val = boost::random::generate_canonical<float, 64>(eng);
BOOST_CHECK_GE(val, 0);
BOOST_CHECK_LT(val, 1);
}
expected.discard(1000);
BOOST_CHECK_EQUAL(eng, expected);
for(int i = 0; i < 1000; ++i) {
float val = boost::random::generate_canonical<float, 12>(eng);
BOOST_CHECK_GE(val, 0);
BOOST_CHECK_LT(val, 1);
}
expected.discard(1000);
BOOST_CHECK_EQUAL(eng, expected);
}
BOOST_AUTO_TEST_CASE_TEMPLATE(test_double, Engine, engines)
{
Engine eng;
Engine expected;
for(int i = 0; i < 1000; ++i) {
double val = boost::random::generate_canonical<double, 64>(eng);
BOOST_CHECK_GE(val, 0);
BOOST_CHECK_LT(val, 1);
}
expected.discard(2000);
BOOST_CHECK_EQUAL(eng, expected);
for(int i = 0; i < 1000; ++i) {
double val = boost::random::generate_canonical<double, 12>(eng);
BOOST_CHECK_GE(val, 0);
BOOST_CHECK_LT(val, 1);
}
expected.discard(1000);
BOOST_CHECK_EQUAL(eng, expected);
}
BOOST_AUTO_TEST_CASE_TEMPLATE(test_long_double, Engine, engines)
{
Engine eng;
Engine expected;
for(int i = 0; i < 1000; ++i) {
long double val = boost::random::generate_canonical<long double, 60>(eng);
BOOST_CHECK_GE(val, 0);
BOOST_CHECK_LT(val, 1);
}
expected.discard(2000);
BOOST_CHECK_EQUAL(eng, expected);
for(int i = 0; i < 1000; ++i) {
long double val = boost::random::generate_canonical<long double, 12>(eng);
BOOST_CHECK_GE(val, 0);
BOOST_CHECK_LT(val, 1);
}
expected.discard(1000);
BOOST_CHECK_EQUAL(eng, expected);
}
struct max_engine
{
typedef boost::uint32_t result_type;
static result_type min BOOST_PREVENT_MACRO_SUBSTITUTION () { return 0; }
static result_type max BOOST_PREVENT_MACRO_SUBSTITUTION ()
{ return ~boost::uint32_t(0); }
result_type operator()() { return (max)(); }
};
BOOST_AUTO_TEST_CASE(test_max)
{
max_engine eng;
BOOST_CHECK_LT((boost::random::generate_canonical<float, 64>(eng)), 1);
BOOST_CHECK_LT((boost::random::generate_canonical<double, 64>(eng)), 1);
BOOST_CHECK_LT((boost::random::generate_canonical<long double, 64>(eng)), 1);
}
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