tests/linker: test manifest creation

flake.nix

@@ -21,12 +21,13 @@
 
     checks = forAllSystems (system: let
       checkArgs = {
-        inherit self;
+        inherit self inputs;
         pkgs = nixpkgs.legacyPackages.${system};
       };
     in {
       hjem-basic = import ./tests/basic.nix checkArgs;
       hjem-special-args = import ./tests/special-args.nix checkArgs;
+      hjem-linker = import ./tests/linker.nix checkArgs;
 
       # Build smfh as a part of 'nix flake check'
       smfh = inputs.smfh.packages.${system}.smfh;

tests/linker.nix

@@ -0,0 +1,48 @@
+let
+  userHome = "/home/alice";
+in
+  (import ./lib) {
+    name = "hjem-linker";
+    nodes = {
+      node1 = {
+        self,
+        pkgs,
+        inputs,
+        ...
+      }: {
+        imports = [self.nixosModules.hjem];
+
+        system.switch.enable = true;
+
+        users.groups.alice = {};
+        users.users.alice = {
+          isNormalUser = true;
+          home = userHome;
+          password = "";
+        };
+
+        hjem = {
+          linker = inputs.smfh.packages.${pkgs.system}.default;
+          users = {
+            alice = {
+              enable = true;
+            };
+          };
+        };
+      };
+    };
+
+    testScript = {nodes, ...}: let
+      baseSystem = nodes.node1.system.build.toplevel;
+    in ''
+      node1.succeed("loginctl enable-linger alice")
+
+      with subtest("Activation service runs correctly"):
+        node1.succeed("${baseSystem}/bin/switch-to-configuration test")
+        node1.succeed("systemctl show servicename --property=Result --value | grep -q '^success$'")
+
+      with subtest("Manifest gets created"):
+        node1.succeed("${baseSystem}/bin/switch-to-configuration test")
+        node1.succeed("[ -f /var/lib/hjem/manifest-alice.json ]")
+    '';
+  }