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// Use smaller statistics when running on simulators, so it takes less time.
// For x86_64-linux-gnu SAMPLES=30000 fails, so increase slightly.
// { dg-options "-DSAMPLES=35000" { target simulator } }
// { dg-do run { target c++11 } }
// Copyright (C) 2010-2019 Free Software Foundation, Inc.
//
// This file is part of the GNU ISO C++ Library. This library is free
// software; you can redistribute it and/or modify it under the
// terms of the GNU General Public License as published by the
// Free Software Foundation; either version 3, or (at your option)
// any later version.
//
// 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 General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this library; see the file COPYING3. If not see
// <http://www.gnu.org/licenses/>.
#include "chi2_quality.h"
// Tests chi^2 of a set of strings that all have a similar pattern,
// intended to mimic some sort of ID string.
void
test_numeric_pattern_set()
{
const unsigned long N = SAMPLES;
const unsigned long k = N/100;
std::vector<std::string> set;
for (unsigned long i = 0; i < N; ++i)
{
long i1 = i % 100000;
long i2 = i / 100000;
char buf[16];
std::sprintf(buf, "XX-%05lu-%05lu", i1, i2);
set.push_back(buf);
}
double chi2 = chi2_hash(set, k);
VERIFY( chi2 < k*1.1 );
}
int
main()
{
test_numeric_pattern_set();
return 0;
}
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