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/* Copyright (c) 2018 Dovecot authors, see the included COPYING file */
#include "test-lib.h"
#include "stats-dist.h"
#include "randgen.h"
#include <math.h>
#define TEST_RAND_SIZE_MEDIAN 100000.0
static void test_random_median(void)
{
uint64_t tmp;
double median, average;
struct stats_dist *s = stats_dist_init_with_size(TEST_RAND_SIZE_MEDIAN);
test_begin("test_random (median & average)");
for(unsigned int i = 0; i < TEST_RAND_SIZE_MEDIAN; i++) {
uint64_t value;
value = i_rand_limit(TEST_RAND_SIZE_MEDIAN);
stats_dist_add(s, value);
}
tmp = stats_dist_get_median(s);
/* median should be 0.5 +-2% */
median = (double)tmp / TEST_RAND_SIZE_MEDIAN;
test_assert(fabs(median - 0.5) < 0.01);
/* average should be 0.5 +- %2 */
average = stats_dist_get_avg(s) / TEST_RAND_SIZE_MEDIAN;
test_assert(fabs(average - 0.5) < 0.01);
stats_dist_deinit(&s);
test_end();
}
static void test_random_limits(void)
{
test_begin("random limits");
test_assert(i_rand_limit(1) == 0);
test_assert(i_rand_minmax(0, 0) == 0);
test_assert(i_rand_minmax(UINT32_MAX, UINT32_MAX) == UINT32_MAX);
test_end();
}
void test_random(void)
{
test_random_median();
test_random_limits();
}
enum fatal_test_state fatal_random(unsigned int stage)
{
switch (stage) {
case 0:
test_begin("random fatals");
test_expect_fatal_string("min_val <= max_val");
(void)i_rand_minmax(1, 0);
return FATAL_TEST_FAILURE;
case 1:
test_expect_fatal_string("upper_bound > 0");
(void)i_rand_limit(0);
return FATAL_TEST_FAILURE;
}
test_end();
return FATAL_TEST_FINISHED;
}
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