libs/test/doc/examples/example43.run.cpp

//  (C) Copyright Gennadiy Rozental 2011-2015.
//  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)

//  See http://www.boost.org/libs/test for the library home page.


//[example_code
#define BOOST_TEST_MODULE example
#include <boost/test/included/unit_test.hpp>
#include <boost/test/tools/floating_point_comparison.hpp>

BOOST_AUTO_TEST_CASE( test )
{
  double v1 = 1.23456e28;
  double v2 = 1.23457e28;

  BOOST_REQUIRE_CLOSE( v1, v2, 0.001 );
  // Absolute value of difference between these two values is 1e+23.
  // But we are interested only that it does not exeed 0.001% of a values compared
  // And this test will pass.
}
//]

Boost C++ Libraries

libs/test/doc/examples/example43.run.cpp