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/*= -*- c-basic-offset: 4; indent-tabs-mode: nil; -*-
*
* rollsum_test -- tests for the librsync rolling checksum.
*
* Copyright (C) 2003 by Donovan Baarda <abo@minkirri.apana.org.au>
*
* This program 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; either version 2.1 of
* the License, or (at your option) any later version.
*
* This program 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 program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
/* Force DEBUG on so that tests can use assert(). */
#undef NDEBUG
#include <stdio.h>
#include <stdint.h>
#include <assert.h>
#include "rollsum.h"
/* Test driver for rollsum. */
int main(int argc, char **argv)
{
Rollsum r;
int i;
unsigned char buf[256];
/* Test RollsumInit() */
RollsumInit(&r);
assert(r.count == 0);
assert(r.s1 == 0);
assert(r.s2 == 0);
assert(RollsumDigest(&r) == 0x00000000);
/* Test RollsumRollin() */
RollsumRollin(&r, 0); /* [0] */
assert(r.count == 1);
assert(RollsumDigest(&r) == 0x001f001f);
RollsumRollin(&r, 1);
RollsumRollin(&r, 2);
RollsumRollin(&r, 3); /* [0,1,2,3] */
assert(r.count == 4);
assert(RollsumDigest(&r) == 0x01400082);
/* Test RollsumRotate() */
RollsumRotate(&r, 0, 4); /* [1,2,3,4] */
assert(r.count == 4);
assert(RollsumDigest(&r) == 0x014a0086);
RollsumRotate(&r, 1, 5);
RollsumRotate(&r, 2, 6);
RollsumRotate(&r, 3, 7); /* [4,5,6,7] */
assert(r.count == 4);
assert(RollsumDigest(&r) == 0x01680092);
/* Test RollsumRollout() */
RollsumRollout(&r, 4); /* [5,6,7] */
assert(r.count == 3);
assert(RollsumDigest(&r) == 0x00dc006f);
RollsumRollout(&r, 5);
RollsumRollout(&r, 6);
RollsumRollout(&r, 7); /* [] */
assert(r.count == 0);
assert(RollsumDigest(&r) == 0x00000000);
/* Test RollsumUpdate() */
for (i = 0; i < 256; i++)
buf[i] = i;
RollsumUpdate(&r, buf, 256);
assert(RollsumDigest(&r) == 0x3a009e80);
return 0;
}
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