END_TEST
START_TEST(test_counter_init_add)
{
counter c;
int res = init_counter(&c);
fail_unless(res == 0);
fail_unless(counter_add_sample(&c, 100) == 0);
fail_unless(counter_count(&c) == 1);
fail_unless(counter_sum(&c) == 100);
fail_unless(counter_mean(&c) == 100);
fail_unless(counter_stddev(&c) == 0);
}
/**
* Increments the counter with the given name
* by a value.
* @arg name The name of the counter
* @arg val The value to add
* @return 0 on success
*/
static int metrics_increment_counter(metrics *m, char *name, double val) {
counter *c;
int res = hashmap_get(m->counters, name, (void**)&c);
// New counter
if (res == -1) {
c = malloc(sizeof(counter));
init_counter(c);
hashmap_put(m->counters, name, c);
}
// Add the sample value
return counter_add_sample(c, val);
}
END_TEST
START_TEST(test_counter_add_loop)
{
counter c;
int res = init_counter(&c);
fail_unless(res == 0);
for (int i=1; i<=100; i++)
fail_unless(counter_add_sample(&c, i) == 0);
fail_unless(counter_count(&c) == 100);
fail_unless(counter_sum(&c) == 5050);
fail_unless(counter_mean(&c) == 50.5);
fail_unless(round(counter_stddev(&c)*1000)/1000 == 29.011);
}
END_TEST
START_TEST(test_counter_sample_rate)
{
counter c;
int res = init_counter(&c);
fail_unless(res == 0);
for (int i=1; i<=100; i++)
fail_unless(counter_add_sample(&c, i, 0.5) == 0);
fail_unless(counter_count(&c) == 200);
fail_unless(counter_sum(&c) == 5050);
fail_unless(counter_mean(&c) == 50.5);
fail_unless(round(counter_stddev(&c)*1000)/1000 == 29.011);
fail_unless(counter_squared_sum(&c) == 338350);
fail_unless(counter_min(&c) == 1);
fail_unless(counter_max(&c) == 100);
}