Unit tests for BIND 9 are based on the CMocka testing framework and
the Kyua test execution engine.

If your distribution of choice doesn't include packages for kyua or cmocka, the
sources can be found here:

 * Kyua 0.13 - https://github.com/jmmv/kyua/releases
 * CMocka 1.0 - https://cmocka.org/files/