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