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<ol class="chapter"><li class="chapter-item expanded "><a href="../index.html"><strong aria-hidden="true">1.</strong> Introduction</a></li><li class="chapter-item expanded "><a href="start/index.html"><strong aria-hidden="true">2.</strong> Quick Start</a></li><li><ol class="section"><li class="chapter-item expanded "><a href="start/iso.html"><strong aria-hidden="true">2.1.</strong> ISO</a></li><li class="chapter-item expanded "><a href="start/bootstrapping.html"><strong aria-hidden="true">2.2.</strong> Bootstrapping</a></li><li class="chapter-item expanded "><a href="start/from-nixos.html"><strong aria-hidden="true">2.3.</strong> From NixOS</a></li></ol></li><li class="chapter-item expanded "><a href="concepts/index.html"><strong aria-hidden="true">3.</strong> Key Concepts</a></li><li><ol class="section"><li class="chapter-item expanded "><a href="concepts/hosts.html"><strong aria-hidden="true">3.1.</strong> Hosts</a></li><li class="chapter-item expanded "><a href="concepts/overrides.html"><strong aria-hidden="true">3.2.</strong> Overrides</a></li><li class="chapter-item expanded "><a href="concepts/profiles.html"><strong aria-hidden="true">3.3.</strong> Profiles</a></li><li class="chapter-item expanded "><a href="concepts/suites.html"><strong aria-hidden="true">3.4.</strong> Suites</a></li><li class="chapter-item expanded "><a href="concepts/users.html"><strong aria-hidden="true">3.5.</strong> Users</a></li></ol></li><li class="chapter-item expanded "><a href="outputs/index.html"><strong aria-hidden="true">4.</strong> Outputs</a></li><li><ol class="section"><li class="chapter-item expanded "><a href="outputs/modules.html"><strong aria-hidden="true">4.1.</strong> Modules</a></li><li class="chapter-item expanded "><a href="outputs/overlays.html"><strong aria-hidden="true">4.2.</strong> Overlays</a></li><li class="chapter-item expanded "><a href="outputs/pkgs.html"><strong aria-hidden="true">4.3.</strong> Packages</a></li></ol></li><li class="chapter-item expanded "><div><strong aria-hidden="true">5.</strong> Concerns</div></li><li><ol class="section"><li class="chapter-item expanded "><a href="secrets.html"><strong aria-hidden="true">5.1.</strong> Secrets</a></li><li class="chapter-item expanded "><a href="tests.html" class="active"><strong aria-hidden="true">5.2.</strong> Tests</a></li></ol></li><li class="chapter-item expanded "><a href="bud/index.html"><strong aria-hidden="true">6.</strong> Helper Script – bud</a></li><li><ol class="section"><li class="chapter-item expanded "><a href="bud/get.html"><strong aria-hidden="true">6.1.</strong> get</a></li></ol></li><li class="chapter-item expanded "><a href="integrations/index.html"><strong aria-hidden="true">7.</strong> Integrations</a></li><li><ol class="section"><li class="chapter-item expanded "><a href="integrations/cachix.html"><strong aria-hidden="true">7.1.</strong> Cachix</a></li><li class="chapter-item expanded "><a href="integrations/deploy.html"><strong aria-hidden="true">7.2.</strong> Deploy RS</a></li><li class="chapter-item expanded "><a href="integrations/nvfetcher.html"><strong aria-hidden="true">7.3.</strong> NvFetcher</a></li><li class="chapter-item expanded "><a href="integrations/hercules.html"><strong aria-hidden="true">7.4.</strong> Hercules CI</a></li></ol></li><li class="chapter-item expanded "><a href="CONTRIBUTING.html"><strong aria-hidden="true">8.</strong> Contributing</a></li></ol> </div>
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<main>
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<h1 id="testing"><a class="header" href="#testing">Testing</a></h1>
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<p>Testing is always an important aspect of any software development project, and
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NixOS offers some incredibly powerful tools to write tests for your
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configuration, and, optionally, run them in
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<a href="./integrations/hercules.html">CI</a>.</p>
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<h2 id="unit-tests"><a class="header" href="#unit-tests">Unit Tests</a></h2>
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<p>Unit tests can be created from regular derivations, and they can do
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almost anything you can imagine. By convention, it is best to test your
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packages during their <a href="https://nixos.org/manual/nixpkgs/stable/#ssec-check-phase">check phase</a>. All packages and their tests will
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be built during CI.</p>
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<h2 id="integration-tests"><a class="header" href="#integration-tests">Integration Tests</a></h2>
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<p>All your profiles defined in suites will be tested in a NixOS VM.</p>
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<p>You can write integration tests for one or more NixOS VMs that can,
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optionally, be networked together, and yes, it's as awesome as it sounds!</p>
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<p>Be sure to use the <code>mkTest</code> function from digga, <code>digga.lib.pkgs-lib.mkTest</code>
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which wraps the official <a href="https://github.com/NixOS/nixpkgs/tree/master/nixos/lib/testing-python.nix">testing-python</a> function to ensure
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that the system is setup exactly as it is for a bare DevOS system. There are
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already great resources for learning how to use these tests effectively,
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including the official <a href="https://nixos.org/manual/nixos/stable/index.html#sec-nixos-tests">docs</a>, a fantastic <a href="https://www.haskellforall.com/2020/11/how-to-use-nixos-for-lightweight.html">blog post</a>,
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and the examples in <a href="https://github.com/NixOS/nixpkgs/tree/master/nixos/tests">nixpkgs</a>.</p>
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