=== About Unit-test suite for Naf Database Tools package ===
1. Unit-tests are written using Simpletest framework.
2. Database unit-tests use Sqlite database in unit_tests/Database/sqlite/db
3. The database file is not provided on http://www.phpvlasses.org due to limitations of upload capabilities
4. For the the unit tests to work, you don't need a database file. You only need `sqlite' folder under unit_tests/Database, _which_your_web-server_has_a_write-access_to_