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132 lines
3.9 KiB
C++
132 lines
3.9 KiB
C++
// (C) Copyright John Maddock 2006.
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// Use, modification and distribution are subject to the
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// Boost Software License, Version 1.0. (See accompanying file
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// LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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#include <boost/math/concepts/real_concept.hpp>
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#include <boost/test/included/test_exec_monitor.hpp>
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#include <boost/test/floating_point_comparison.hpp>
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#include <boost/math/tools/stats.hpp>
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#include <boost/math/tools/test.hpp>
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#include <boost/type_traits/is_floating_point.hpp>
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#include <boost/array.hpp>
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#include <boost/math/special_functions/cbrt.hpp>
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#include "functor.hpp"
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#include "handle_test_result.hpp"
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//
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// DESCRIPTION:
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// ~~~~~~~~~~~~
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//
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// This file tests the function cbrt. The accuracy tests
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// use values generated with NTL::RR at 1000-bit precision
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// and our generic versions of these functions.
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//
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// Note that when this file is first run on a new platform many of
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// these tests will fail: the default accuracy is 1 epsilon which
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// is too tight for most platforms. In this situation you will
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// need to cast a human eye over the error rates reported and make
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// a judgement as to whether they are acceptable. Either way please
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// report the results to the Boost mailing list. Acceptable rates of
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// error are marked up below as a series of regular expressions that
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// identify the compiler/stdlib/platform/data-type/test-data/test-function
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// along with the maximum expected peek and RMS mean errors for that
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// test.
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//
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void expected_results()
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{
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//
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// Define the max and mean errors expected for
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// various compilers and platforms.
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//
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//
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// Finish off by printing out the compiler/stdlib/platform names,
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// we do this to make it easier to mark up expected error rates.
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//
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std::cout << "Tests run with " << BOOST_COMPILER << ", "
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<< BOOST_STDLIB << ", " << BOOST_PLATFORM << std::endl;
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add_expected_result(
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"Borland.*", // compiler
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".*", // stdlib
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".*", // platform
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"long double", // test type(s)
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".*", // test data group
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".*", 10, 6); // test function
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}
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struct negative_cbrt
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{
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negative_cbrt(){}
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template <class S>
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typename S::value_type operator()(const S& row)
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{
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return boost::math::cbrt(-row[1]);
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}
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};
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template <class T>
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void do_test_cbrt(const T& data, const char* type_name, const char* test_name)
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{
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typedef typename T::value_type row_type;
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typedef typename row_type::value_type value_type;
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typedef value_type (*pg)(value_type);
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pg funcp = boost::math::cbrt;
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boost::math::tools::test_result<value_type> result;
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std::cout << "Testing " << test_name << " with type " << type_name
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<< "\n~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~\n";
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//
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// test cbrt against data:
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//
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result = boost::math::tools::test(
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data,
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bind_func(funcp, 1),
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extract_result(0));
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result += boost::math::tools::test(
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data,
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negative_cbrt(),
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negate(extract_result(0)));
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handle_test_result(result, data[result.worst()], result.worst(), type_name, "boost::math::cbrt", test_name);
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std::cout << std::endl;
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}
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template <class T>
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void test_cbrt(T, const char* name)
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{
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//
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// The actual test data is rather verbose, so it's in a separate file
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//
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// The contents are as follows, each row of data contains
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// three items, input value a, input value b and erf(a, b):
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//
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# include "cbrt_data.ipp"
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do_test_cbrt(cbrt_data, name, "cbrt Function");
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}
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int test_main(int, char* [])
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{
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expected_results();
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BOOST_MATH_CONTROL_FP;
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test_cbrt(0.1F, "float");
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test_cbrt(0.1, "double");
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#ifndef BOOST_MATH_NO_LONG_DOUBLE_MATH_FUNCTIONS
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test_cbrt(0.1L, "long double");
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#ifndef BOOST_MATH_NO_REAL_CONCEPT_TESTS
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test_cbrt(boost::math::concepts::real_concept(0.1), "real_concept");
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#endif
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#endif
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return 0;
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}
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