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/* vi:set ts=8 sts=4 sw=4 noet:
*
* VIM - Vi IMproved by Bram Moolenaar
*
* Do ":help uganda" in Vim to read copying and usage conditions.
* Do ":help credits" in Vim to see a list of people who contributed.
* See README.txt for an overview of the Vim source code.
*/
/*
* memfile_test.c: Unittests for memfile.c
* Mostly by Ivan Krasilnikov.
*/
#undef NDEBUG
#include <assert.h>
// Must include main.c because it contains much more than just main()
#define NO_VIM_MAIN
#include "main.c"
// This file has to be included because the tested functions are static
#include "memfile.c"
#define index_to_key(i) ((i) ^ 15167)
#define TEST_COUNT 50000
/*
* Test mf_hash_*() functions.
*/
static void
test_mf_hash(void)
{
mf_hashtab_T ht;
mf_hashitem_T *item;
blocknr_T key;
long_u i;
long_u num_buckets;
mf_hash_init(&ht);
// insert some items and check invariants
for (i = 0; i < TEST_COUNT; i++)
{
assert(ht.mht_count == i);
// check that number of buckets is a power of 2
num_buckets = ht.mht_mask + 1;
assert(num_buckets > 0 && (num_buckets & (num_buckets - 1)) == 0);
// check load factor
assert(ht.mht_count <= (num_buckets << MHT_LOG_LOAD_FACTOR));
if (i < (MHT_INIT_SIZE << MHT_LOG_LOAD_FACTOR))
{
// first expansion shouldn't have occurred yet
assert(num_buckets == MHT_INIT_SIZE);
assert(ht.mht_buckets == ht.mht_small_buckets);
}
else
{
assert(num_buckets > MHT_INIT_SIZE);
assert(ht.mht_buckets != ht.mht_small_buckets);
}
key = index_to_key(i);
assert(mf_hash_find(&ht, key) == NULL);
// allocate and add new item
item = LALLOC_CLEAR_ONE(mf_hashitem_T);
assert(item != NULL);
item->mhi_key = key;
mf_hash_add_item(&ht, item);
assert(mf_hash_find(&ht, key) == item);
if (ht.mht_mask + 1 != num_buckets)
{
// hash table was expanded
assert(ht.mht_mask + 1 == num_buckets * MHT_GROWTH_FACTOR);
assert(i + 1 == (num_buckets << MHT_LOG_LOAD_FACTOR));
}
}
// check presence of inserted items
for (i = 0; i < TEST_COUNT; i++)
{
key = index_to_key(i);
item = mf_hash_find(&ht, key);
assert(item != NULL);
assert(item->mhi_key == key);
}
// delete some items
for (i = 0; i < TEST_COUNT; i++)
{
if (i % 100 < 70)
{
key = index_to_key(i);
item = mf_hash_find(&ht, key);
assert(item != NULL);
assert(item->mhi_key == key);
mf_hash_rem_item(&ht, item);
assert(mf_hash_find(&ht, key) == NULL);
mf_hash_add_item(&ht, item);
assert(mf_hash_find(&ht, key) == item);
mf_hash_rem_item(&ht, item);
assert(mf_hash_find(&ht, key) == NULL);
vim_free(item);
}
}
// check again
for (i = 0; i < TEST_COUNT; i++)
{
key = index_to_key(i);
item = mf_hash_find(&ht, key);
if (i % 100 < 70)
{
assert(item == NULL);
}
else
{
assert(item != NULL);
assert(item->mhi_key == key);
}
}
// free hash table and all remaining items
mf_hash_free_all(&ht);
}
int
main(void)
{
test_mf_hash();
return 0;
}
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