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Added 3 test cases for lgamma_q [skip ci]

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This commit is contained in:
Jacob Hass
2025-12-31 14:31:06 -08:00
parent 27300a6b60
commit 595eb6850b
1 changed files with 7 additions and 0 deletions
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7
test/test_igamma.hpp
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@@ -255,6 +255,13 @@ void test_spots(T)
//
BOOST_CHECK_EQUAL(::boost::math::gamma_q(static_cast<T>(1770), static_cast<T>(1e-12)), 1);
BOOST_CHECK_EQUAL(::boost::math::gamma_p(static_cast<T>(1770), static_cast<T>(1e-12)), 0);
//
// Check that lgamma_q returns correct values
//
BOOST_CHECK_CLOSE(::boost::math::lgamma_q(static_cast<T>(5), static_cast<T>(100)), static_cast<T>(log(1.6139305336977304790405739225035685228527400976549e-37L)), tolerance);
BOOST_CHECK_CLOSE(::boost::math::lgamma_q(static_cast<T>(22.5), static_cast<T>(2000)), static_cast<T>(-1883.4897732037716195918619632721L), tolerance * 10); // calculated via mpmath
BOOST_CHECK_CLOSE(::boost::math::lgamma_q(static_cast<T>(501.2), static_cast<T>(2000)), static_cast<T>(-810.31461624182202285737730562687L), tolerance * 10); // calculated via mpmath
//
// Coverage:
//