<chapter xmlns="http://docbook.org/ns/docbook"
        xmlns:xlink="http://www.w3.org/1999/xlink"
        xmlns:xi="http://www.w3.org/2001/XInclude"
        version="5.0"
        xml:id="sec-nixos-tests">

<title>NixOS Tests</title>

<para>When you add some feature to NixOS, you should write a test for
it. NixOS tests are kept in the directory <filename
xlink:href="https://github.com/NixOS/nixpkgs/tree/master/nixos/tests">nixos/tests</filename>,
and are executed (using Nix) by a testing framework that automatically
starts one or more virtual machines containing the NixOS system(s)
required for the test.</para>

<xi:include href="writing-nixos-tests.xml" />
<xi:include href="running-nixos-tests.xml" />

</chapter>