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/*
* Copyright (C) 2014 Philipp Rosenkranz
* Copyright (C) 2013 Freie Universitรคt Berlin
*
* This file is subject to the terms and conditions of the GNU Lesser
* General Public License v2.1. See the file LICENSE in the top level
* directory for more details.
*/
#include <string.h>
#include <stdio.h>
#include "tests-bloom.h"
#include "hashes.h"
#include "bloom.h"
#include "bitfield.h"
#include "tests-bloom-sets.h"
#define TESTS_BLOOM_BITS (128)
#define TESTS_BLOOM_HASHF (6)
#define TESTS_BLOOM_PROB_IN_FILTER (4)
#define TESTS_BLOOM_NOT_IN_FILTER (996)
#define TESTS_BLOOM_FALSE_POS_RATE_THR (0.005)
static bloom_t bloom;
BITFIELD(bf, TESTS_BLOOM_BITS);
hashfp_t hashes[TESTS_BLOOM_HASHF] = {
(hashfp_t) fnv_hash,
(hashfp_t) sax_hash,
(hashfp_t) sdbm_hash,
(hashfp_t) djb2_hash,
(hashfp_t) kr_hash,
(hashfp_t) dek_hash,
};
static void load_dictionary_fixture(void)
{
for (int i = 0; i < lenB; i++)
{
bloom_add(&bloom, (const uint8_t *) B[i], strlen(B[i]));
}
}
static void set_up_bloom(void)
{
bloom_init(&bloom, TESTS_BLOOM_BITS, bf, hashes, TESTS_BLOOM_HASHF);
}
static void tear_down_bloom(void)
{
bloom_del(&bloom);
}
static void test_bloom_parameters_bytes_hashf(void)
{
TEST_ASSERT_EQUAL_INT(TESTS_BLOOM_BITS, bloom.m);
TEST_ASSERT_EQUAL_INT(TESTS_BLOOM_HASHF, bloom.k);
}
static void test_bloom_based_on_dictionary_fixture(void)
{
int in = 0;
int not_in = 0;
double false_positive_rate = 0;
load_dictionary_fixture();
for (int i = 0; i < lenA; i++)
{
if (bloom_check(&bloom, (const uint8_t *) A[i], strlen(A[i])))
{
in++;
}
else
{
not_in++;
}
}
false_positive_rate = (double) in / (double) lenA;
TEST_ASSERT_EQUAL_INT(TESTS_BLOOM_PROB_IN_FILTER, in);
TEST_ASSERT_EQUAL_INT(TESTS_BLOOM_NOT_IN_FILTER, not_in);
TEST_ASSERT(false_positive_rate < TESTS_BLOOM_FALSE_POS_RATE_THR);
}
Test *tests_bloom_tests(void)
{
EMB_UNIT_TESTFIXTURES(fixtures) {
new_TestFixture(test_bloom_parameters_bytes_hashf),
new_TestFixture(test_bloom_based_on_dictionary_fixture),
};
EMB_UNIT_TESTCALLER(bloom_tests, set_up_bloom, tear_down_bloom, fixtures);
return (Test *)&bloom_tests;
}
void tests_bloom(void)
{
TESTS_RUN(tests_bloom_tests());
}
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