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Unit test for tor_weak_random_range

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This commit is contained in:
Nick Mathewson 2013-02-08 16:46:35 -05:00
parent 4bfd7806bf
commit 029d2c6587
1 changed files with 29 additions and 0 deletions
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29
src/test/test_util.c
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@ -3241,6 +3241,34 @@ test_util_set_env_var_in_sl(void *ptr)
smartlist_free(expected_resulting_env_vars);
}
static void
test_util_weak_random(void *arg)
{
int i, j, n[16];
tor_weak_rng_t rng;
(void) arg;
tor_init_weak_random(&rng, (unsigned)time(NULL));
for (i = 1; i <= 256; ++i) {
for (j=0;j<100;++j) {
int r = tor_weak_random_range(&rng, i);
tt_int_op(0, <=, r);
tt_int_op(r, <, i);
}
}
memset(n,0,sizeof(n));
for (j=0;j<8192;++j) {
n[tor_weak_random_range(&rng, 16)]++;
}
for (i=0;i<16;++i)
tt_int_op(n[i], >, 0);
done:
;
}
static void
test_util_mathlog(void *arg)
{
@ -3312,6 +3340,7 @@ struct testcase_t util_tests[] = {
UTIL_TEST(read_file_eof_two_loops, 0),
UTIL_TEST(read_file_eof_zero_bytes, 0),
UTIL_TEST(mathlog, 0),
UTIL_TEST(weak_random, 0),
END_OF_TESTCASES
};