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forked from 0ad/0ad
0ad/source/lib/tests/test_rand.h
janwas aea2368300 fixes to stack trace code under x64 (from work):
- displaying symbol values requires stack pointer, not frame pointer
- update debug_IsPointerBogus
- skip-n-frames code changed to skip-all-frames-up-to-func (more
reliable in the face of inlining)

debug.cpp: cleanup

This was SVN commit r6410.
2008-09-27 10:05:11 +00:00

43 lines
975 B
C++

#include "lib/self_test.h"
#include "lib/rand.h"
class TestRand : public CxxTest::TestSuite
{
public:
// complain if huge interval or min > max
void TestParam()
{
debug_SkipNextError(ERR::INVALID_PARAM);
TS_ASSERT_EQUALS(rand(1, 0), size_t(0));
debug_SkipNextError(ERR::INVALID_PARAM);
TS_ASSERT_EQUALS(rand(2, ~0u), size_t(0));
}
// 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);
}
};