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/* Copyright (C) 2025 Wildfire Games.
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sublicense, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice shall be included
* in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
#include "lib/self_test.h"
#include "lib/debug.h"
#include "lib/rand.h"
#include "lib/status.h"
#include <cstdlib>
class TestRand : public CxxTest::TestSuite
{
public:
// complain if huge interval or min > max
void TestParam()
{
debug_SkipErrors(ERR::INVALID_PARAM);
TS_ASSERT_EQUALS(rand(1, 0), size_t(0));
TS_ASSERT_EQUALS(rand(2, ~0u), size_t(0));
const size_t numSkipped = debug_StopSkippingErrors();
TS_ASSERT_EQUALS(numSkipped, (size_t)2);
}
// returned number must be in [min, max)
void TestReturnedRange()
{
for(int i = 0; i < 100; i++)
{
size_t min = rand(), max = min+rand();
size_t x = rand(min, max);
TS_ASSERT(min <= x && x < max);
}
}
// make sure both possible values are hit
void TestTwoValues()
{
size_t ones = 0, twos = 0;
for(int i = 0; i < 100; i++)
{
size_t x = rand(1, 3);
// paranoia: don't use array (x might not be 1 or 2 - checked below)
if(x == 1) ones++;
if(x == 2) twos++;
}
TS_ASSERT_EQUALS(ones+twos, size_t(100));
TS_ASSERT(ones > 10 && twos > 10);
}
};
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