/** * @file llrandom_test.cpp * @author Phoenix * @date 2007-01-25 * * $LicenseInfo:firstyear=2007&license=viewerlgpl$ * Second Life Viewer Source Code * Copyright (C) 2010, Linden Research, Inc. * * This library is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; * version 2.1 of the License only. * * This library is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with this library; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA * * Linden Research, Inc., 945 Battery Street, San Francisco, CA 94111 USA * $/LicenseInfo$ */ #include "linden_common.h" #include "../test/lltut.h" #include "../llrand.h" #include "stringize.h" // In llrand.h, every function is documented to return less than the high end // -- specifically, because you can pass a negative extent, they're documented // never to return a value equal to the extent. // So that we don't need two different versions of ensure_in_range(), when // testing extent < 0, negate the return value and the extent before passing // into ensure_in_range(). template <typename NUMBER> void ensure_in_range(const std::string_view& name, NUMBER value, NUMBER low, NUMBER high) { auto failmsg{ stringize(name, " >= ", low, " (", value, ')') }; tut::ensure(failmsg, (value >= low)); failmsg = stringize(name, " < ", high, " (", value, ')'); tut::ensure(failmsg, (value < high)); } namespace tut { struct random { }; typedef test_group<random> random_t; typedef random_t::object random_object_t; tut::random_t tut_random("LLSeedRand"); template<> template<> void random_object_t::test<1>() { for(S32 ii = 0; ii < 100000; ++ii) { ensure_in_range("frand", ll_frand(), 0.0f, 1.0f); } } template<> template<> void random_object_t::test<2>() { for(S32 ii = 0; ii < 100000; ++ii) { ensure_in_range("drand", ll_drand(), 0.0, 1.0); } } template<> template<> void random_object_t::test<3>() { for(S32 ii = 0; ii < 100000; ++ii) { ensure_in_range("frand(2.0f)", ll_frand(2.0f) - 1.0f, -1.0f, 1.0f); } } template<> template<> void random_object_t::test<4>() { for(S32 ii = 0; ii < 100000; ++ii) { // Negate the result so we don't have to allow a templated low-end // comparison as well. ensure_in_range("-frand(-7.0)", -ll_frand(-7.0), 0.0f, 7.0f); } } template<> template<> void random_object_t::test<5>() { for(S32 ii = 0; ii < 100000; ++ii) { ensure_in_range("-drand(-2.0)", -ll_drand(-2.0), 0.0, 2.0); } } template<> template<> void random_object_t::test<6>() { for(S32 ii = 0; ii < 100000; ++ii) { ensure_in_range("rand(100)", ll_rand(100), 0, 100); } } template<> template<> void random_object_t::test<7>() { for(S32 ii = 0; ii < 100000; ++ii) { ensure_in_range("-rand(-127)", -ll_rand(-127), 0, 127); } } }