add unit test: TF validate

.forgejo/workflows/ci.yaml

@@ -26,3 +26,9 @@ jobs:
     steps:
       - uses: actions/checkout@v4
       - run: cd panel && nix-build -A tests
+
+  check-launch:
+    runs-on: native
+    steps:
+      - uses: actions/checkout@v4
+      - run: cd launch && nix-build -A tests

launch/default.nix

@@ -28,6 +28,8 @@ in
     ];
   };
 
+  tests = pkgs.callPackage ./tests.nix { };
+
   # re-export inputs so they can be overridden granularly
   # (they can't be accessed from the outside any other way)
   inherit

launch/tests.nix

@@ -0,0 +1,26 @@
+{ lib, pkgs }:
+let
+  defaults = {
+    virtualisation = {
+      memorySize = 2048;
+      cores = 2;
+    };
+  };
+  tf = pkgs.callPackage ./tf.nix { };
+  tfEnv = pkgs.callPackage ./tf-env.nix { };
+in
+lib.mapAttrs (name: test: pkgs.testers.runNixOSTest (test // { inherit name; })) {
+  tf-validate = {
+    inherit defaults;
+    nodes.server = {
+      environment.systemPackages = [
+        tf
+        tfEnv
+      ];
+    };
+    testScript = ''
+      server.wait_for_unit("multi-user.target")
+      server.succeed("${lib.getExe tf} -chdir='${tfEnv}/launch' validate")
+    '';
+  };
+}