git.ozlabs.org Git - ccan/blob - ccan/tally/test/run-mean.c

   1 #include <ccan/tally/tally.c>
   2 #include <ccan/tap/tap.h>
   3
   4 int main(void)
   5 {
   6         int i;
   7         struct tally *tally = tally_new(0);
   8         ssize_t min, max;
   9
  10         max = (ssize_t)~(1ULL << (sizeof(max)*CHAR_BIT - 1));
  11         min = (ssize_t)(1ULL << (sizeof(max)*CHAR_BIT - 1));
  12
  13         plan_tests(100 + 100);
  14         /* Simple mean test: should always be 0. */
  15         for (i = 0; i < 100; i++) {
  16                 tally_add(tally, i);
  17                 tally_add(tally, -i);
  18                 ok1(tally_mean(tally) == 0);
  19         }
  20
  21         /* Works for big values too... */
  22         for (i = 0; i < 100; i++) {
  23                 tally_add(tally, max - i);
  24                 tally_add(tally, min + 1 + i);
  25                 ok1(tally_mean(tally) == 0);
  26         }
  27
  28         free(tally);
  29         return exit_status();
  30 }