ceph/src/boost/libs/test/doc/examples/tolerance_03.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_03
  10 #include <boost/test/included/unit_test.hpp>
  11 namespace utf = boost::unit_test;
  12
  13 double x = 10.000000;
  14 double d =  0.000001;
  15
  16 BOOST_AUTO_TEST_CASE(passing, * utf::tolerance(0.0001))
  17 {
  18   BOOST_TEST(x == x + d); // equal with tolerance
  19   BOOST_TEST(x >= x + d); // ==> greater-or-equal
  20
  21   BOOST_TEST(d == .0);    // small with tolerance
  22 }
  23
  24 BOOST_AUTO_TEST_CASE(failing, * utf::tolerance(0.0001))
  25 {
  26   BOOST_TEST(x - d <  x); // less, but still too close
  27   BOOST_TEST(x - d != x); // unequal but too close
  28
  29   BOOST_TEST(d > .0);     // positive, but too small
  30   BOOST_TEST(d < .0);     // not sufficiently negative
  31 }
  32 //]