def test__check_key_existence_failure():
db_repository = BasicDBRepository()
db_repository.data_map = {DATA_KEY: DATA_VALUE}
bloom_filter = BloomFilter(db_repository, [], BIT_VECTOR_SIZE)
bloom_filter.bit_vector = [0, 0, 0, 0, 0]
hash_ = hashing_function.hash_key(DATA_KEY, BIT_VECTOR_SIZE)
assert bloom_filter._check_key_existence([hash_]) == False
def test_read_with_existing_key_successfully():
hash_functions = [hashing_function]
db_repository = BasicDBRepository()
db_repository.data_map = {DATA_KEY: DATA_VALUE}
bloom_filter = BloomFilter(db_repository, hash_functions, BIT_VECTOR_SIZE)
bloom_filter.bit_vector = [0, 0, 0, 0, 1]
result = bloom_filter.get_data_with_key(DATA_KEY)
assert result == DATA_VALUE
