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Diffstat (limited to 'src/boost/libs/math/test/test_bessel_k.cpp')
| -rw-r--r-- | src/boost/libs/math/test/test_bessel_k.cpp | 138 |
1 files changed, 138 insertions, 0 deletions
diff --git a/src/boost/libs/math/test/test_bessel_k.cpp b/src/boost/libs/math/test/test_bessel_k.cpp new file mode 100644 index 00000000..f0975b46 --- /dev/null +++ b/src/boost/libs/math/test/test_bessel_k.cpp @@ -0,0 +1,138 @@ +// Copyright John Maddock 2006, 2007 +// Copyright Paul A. Bristow 2007 + +// Use, modification and distribution are subject to 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) + +#include <pch_light.hpp> + +#ifdef _MSC_VER +# pragma warning(disable : 4756) // overflow in constant arithmetic +// Constants are too big for float case, but this doesn't matter for test. +#endif + +#include "test_bessel_k.hpp" + +// +// DESCRIPTION: +// ~~~~~~~~~~~~ +// +// This file tests the bessel K function. There are two sets of tests, spot +// tests which compare our results with selected values computed +// using the online special function calculator at +// functions.wolfram.com, while the bulk of the accuracy tests +// use values generated with NTL::RR at 1000-bit precision +// and our generic versions of these functions. +// +// Note that when this file is first run on a new platform many of +// these tests will fail: the default accuracy is 1 epsilon which +// is too tight for most platforms. In this situation you will +// need to cast a human eye over the error rates reported and make +// a judgement as to whether they are acceptable. Either way please +// report the results to the Boost mailing list. Acceptable rates of +// error are marked up below as a series of regular expressions that +// identify the compiler/stdlib/platform/data-type/test-data/test-function +// along with the maximum expected peek and RMS mean errors for that +// test. +// + +void expected_results() +{ + // + // Define the max and mean errors expected for + // various compilers and platforms. + // + const char* largest_type; +#ifndef BOOST_MATH_NO_LONG_DOUBLE_MATH_FUNCTIONS + if(boost::math::policies::digits<double, boost::math::policies::policy<> >() == boost::math::policies::digits<long double, boost::math::policies::policy<> >()) + { + largest_type = "(long\\s+)?double|real_concept"; + } + else + { + largest_type = "long double|real_concept"; + } +#else + largest_type = "(long\\s+)?double|real_concept"; +#endif + // + // On MacOS X cyl_bessel_k has much higher error levels than + // expected: given that the implementation is basically + // just a continued fraction evaluation combined with + // exponentiation, we conclude that exp and pow are less + // accurate on this platform, especially when the result + // is outside the range of a double. + // + add_expected_result( + ".*", // compiler + ".*", // stdlib + "Mac OS", // platform + largest_type, // test type(s) + ".*", // test data group + ".*", 4000, 1300); // test function + + add_expected_result( + "GNU.*", // compiler + ".*", // stdlib + "Win32.*", // platform + largest_type, // test type(s) + ".*large.*", // test data group + ".*", 250, 100); // test function + add_expected_result( + ".*", // compiler + ".*", // stdlib + ".*", // platform + largest_type, // test type(s) + ".*large.*", // test data group + ".*", 100, 50); // test function + add_expected_result( + ".*", // compiler + ".*", // stdlib + ".*", // platform + "real_concept", // test type(s) + ".*", // test data group + ".*", 90, 50); // test function + add_expected_result( + ".*", // compiler + ".*", // stdlib + ".*", // platform + largest_type, // test type(s) + ".*", // test data group + ".*", 35, 15); // test function + // + // Finish off by printing out the compiler/stdlib/platform names, + // we do this to make it easier to mark up expected error rates. + // + std::cout << "Tests run with " << BOOST_COMPILER << ", " + << BOOST_STDLIB << ", " << BOOST_PLATFORM << std::endl; +} + +BOOST_AUTO_TEST_CASE( test_main ) +{ +#ifdef TEST_GSL + gsl_set_error_handler_off(); +#endif + expected_results(); + BOOST_MATH_CONTROL_FP; + +#ifndef BOOST_MATH_BUGGY_LARGE_FLOAT_CONSTANTS + test_bessel(0.1F, "float"); +#endif + test_bessel(0.1, "double"); +#ifndef BOOST_MATH_NO_LONG_DOUBLE_MATH_FUNCTIONS + test_bessel(0.1L, "long double"); +#ifndef BOOST_MATH_NO_REAL_CONCEPT_TESTS + test_bessel(boost::math::concepts::real_concept(0.1), "real_concept"); +#endif +#else + std::cout << "<note>The long double tests have been disabled on this platform " + "either because the long double overloads of the usual math functions are " + "not available at all, or because they are too inaccurate for these tests " + "to pass.</note>" << std::endl; +#endif +} + + + + |