ceph/src/boost/libs/uuid/test/test_random_generator.cpp

   1 //  (C) Copyright Andy Tompkins 2010. Permission to copy, use, modify, sell and
   2 //  distribute this software is granted provided this copyright notice appears
   3 //  in all copies. This software is provided "as is" without express or implied
   4 //  warranty, and with no claim as to its suitability for any purpose.
   5
   6 // Distributed under the Boost Software License, Version 1.0. (See
   7 // accompanying file LICENSE_1_0.txt or copy at
   8 // http://www.boost.org/LICENSE_1_0.txt)
   9
  10 //  libs/uuid/test/test_random_generator.cpp  -------------------------------//
  11
  12 #include <boost/uuid/uuid.hpp>
  13 #include <boost/uuid/random_generator.hpp>
  14 #include <boost/uuid/uuid_io.hpp>
  15 #include <boost/detail/lightweight_test.hpp>
  16 #include <boost/random.hpp>
  17 #include <boost/random/random_device.hpp>
  18
  19 template <typename RandomUuidGenerator>
  20 void check_random_generator(RandomUuidGenerator& uuid_gen)
  21 {
  22     boost::uuids::uuid u1 = uuid_gen();
  23     boost::uuids::uuid u2 = uuid_gen();
  24
  25     BOOST_TEST_NE(u1, u2);
  26
  27     // check variant
  28     BOOST_TEST_EQ(u1.variant(), boost::uuids::uuid::variant_rfc_4122);
  29
  30     // version
  31     BOOST_TEST_EQ(u1.version(), boost::uuids::uuid::version_random_number_based);
  32 }
  33
  34 int main(int, char*[])
  35 {
  36     using namespace boost::uuids;
  37
  38     // default random number generator
  39     random_generator uuid_gen1;
  40     check_random_generator(uuid_gen1);
  41
  42     // specific random number generator
  43     basic_random_generator<boost::rand48> uuid_gen2;
  44     check_random_generator(uuid_gen2);
  45
  46     // pass by reference
  47     boost::ecuyer1988 ecuyer1988_gen;
  48     basic_random_generator<boost::ecuyer1988> uuid_gen3(ecuyer1988_gen);
  49     check_random_generator(uuid_gen3);
  50
  51     // pass by pointer
  52     boost::lagged_fibonacci607 lagged_fibonacci607_gen;
  53     basic_random_generator<boost::lagged_fibonacci607> uuid_gen4(&lagged_fibonacci607_gen);
  54     check_random_generator(uuid_gen4);
  55
  56     // random device
  57     basic_random_generator<boost::random::random_device> uuid_gen5;
  58     check_random_generator(uuid_gen5);
  59
  60     // there was a bug in basic_random_generator where it did not
  61     // produce very random numbers.  This checks for that bug.
  62     uuid u = random_generator()();
  63     if ( (u.data[4] == u.data[12]) &&
  64          (u.data[5] == u.data[9] && u.data[5] == u.data[13]) &&
  65          (u.data[7] == u.data[11] && u.data[7] == u.data[15]) &&
  66          (u.data[10] == u.data[14]) )
  67     {
  68         BOOST_ERROR("basic_random_generator is not producing random uuids");
  69     }
  70
  71     return boost::report_errors();
  72 }