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

BOOST_AUTO_TEST_CASE( test )
{
  double v = -1.23456e-3;
  BOOST_CHECK_SMALL( v, 0.000001 );
}
//]