ceph/src/boost/libs/test/doc/examples/tolerance_04.run-fail.cpp

   1 //  Copyright (c) 2015 Boost.Test team
   2 //  Distributed under the Boost Software License, Version 1.0.
   3 //  (See accompanying file LICENSE_1_0.txt or copy at
   4 //  http://www.boost.org/LICENSE_1_0.txt)
   5
   6 //  See http://www.boost.org/libs/test for the library home page.
   7
   8 //[example_code
   9 #define BOOST_TEST_MODULE tolerance_04
  10 #include <boost/test/included/unit_test.hpp>
  11 #include <boost/rational.hpp>
  12 namespace utf = boost::unit_test;
  13 namespace tt = boost::test_tools;
  14
  15 namespace boost { namespace math { namespace fpc {
  16
  17   template <typename I>
  18   struct tolerance_based< rational<I> > : boost::true_type{};
  19
  20 } } }
  21
  22 typedef boost::rational<int> ratio;
  23
  24 BOOST_AUTO_TEST_CASE(test1, * utf::tolerance(ratio(1, 1000)))
  25 {
  26   ratio x (1002, 100); // 10.02
  27   ratio y (1001, 100); // 10.01
  28   ratio z (1000, 100); // 10.00
  29
  30   BOOST_TEST(x == y);  // irrelevant diff by default
  31   BOOST_TEST(x == y, tt::tolerance(ratio(1, 2000)));
  32
  33   BOOST_TEST(x != z);  // relevant diff by default
  34   BOOST_TEST(x != z, tt::tolerance(ratio(2, 1000)));
  35 }
  36 //]