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/**
* @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(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);
}
}
}
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