diff --git a/test/Jamfile.v2 b/test/Jamfile.v2 index 41be0f8bb..384326442 100644 --- a/test/Jamfile.v2 +++ b/test/Jamfile.v2 @@ -591,6 +591,7 @@ test-suite special_fun : [ run test_fibonacci.cpp /boost/test//boost_unit_test_framework ] [ run test_prime.cpp /boost/test//boost_unit_test_framework ] [ run test_logistic_sigmoid.cpp ] + [ run test_logit.cpp ] ; test-suite distribution_tests : diff --git a/test/test_logit.cpp b/test/test_logit.cpp new file mode 100644 index 000000000..fb2c67c5d --- /dev/null +++ b/test/test_logit.cpp @@ -0,0 +1,87 @@ +// Copyright Matt Borland 2025. +// 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 +#include +#include "math_unit_test.hpp" +#include +#include + +#pragma STDC FENV_ACCESS ON + +template +void test() +{ + const std::array x_values = { + 0.01, + 0.24, + 0.5, + 0.75, + 0.995, + }; + const std::array y_values = { + RealType{-4.595119850134589926852434051810180709116687969582916078687956376405}, + RealType{-1.15267950993838545919655007350715126451438856911612411268258589327840479}, + RealType{0}, + RealType{1.09861228866810969139524523692252570464749055782274945173469433363749429}, + RealType{5.2933048247244923954101212918685372018911052805694724989064609879440992} + }; + + for (std::size_t i = 0; i < x_values.size(); ++i) + { + const RealType test_value {boost::math::logit(x_values[i])}; + + BOOST_MATH_IF_CONSTEXPR (std::is_arithmetic::value) + { + CHECK_ULP_CLOSE(test_value, y_values[i], 5); + } + else + { + CHECK_MOLLIFIED_CLOSE(test_value, y_values[i], 1e-15); + } + + bool fe {false}; + if (std::fetestexcept(FE_OVERFLOW)) + { + fe = true; + std::cerr << "FE_OVERFLOW" << std::endl; + } + if (std::fetestexcept(FE_UNDERFLOW)) + { + fe = true; + std::cerr << "FE_UNDERFLOW" << std::endl; + } + if (std::fetestexcept(FE_DIVBYZERO)) + { + fe = true; + std::cerr << "FE_DIVBYZERO" << std::endl; + } + if (std::fetestexcept(FE_INVALID)) + { + fe = true; + std::cerr << "FE_INVALID" << std::endl; + } + + CHECK_EQUAL(fe, false); + } +} + +int main() +{ + std::feclearexcept(FE_ALL_EXCEPT); + test(); + + std::feclearexcept(FE_ALL_EXCEPT); + test(); + + std::feclearexcept(FE_ALL_EXCEPT); + test(); + + std::feclearexcept(FE_ALL_EXCEPT); + test(); + + return boost::math::test::report_errors(); +}