paisa: add nixos-tests

nixos/tests/all-tests.nix

@@ -1049,6 +1049,7 @@ in
   overlayfs = runTest ./overlayfs.nix;
   pacemaker = runTest ./pacemaker.nix;
   packagekit = runTest ./packagekit.nix;
+  paisa = runTest ./paisa.nix;
   pam-file-contents = runTest ./pam/pam-file-contents.nix;
   pam-oath-login = runTest ./pam/pam-oath-login.nix;
   pam-u2f = runTest ./pam/pam-u2f.nix;

nixos/tests/paisa.nix

@@ -0,0 +1,23 @@
+{ ... }:
+{
+  name = "paisa";
+  nodes.machine =
+    { pkgs, ... }:
+    {
+      systemd.services.paisa = {
+        description = "Paisa";
+        wantedBy = [ "multi-user.target" ];
+        serviceConfig.ExecStart = "${pkgs.paisa}/bin/paisa serve";
+      };
+    };
+  testScript = ''
+    start_all()
+
+    machine.systemctl("start network-online.target")
+    machine.wait_for_unit("network-online.target")
+    machine.wait_for_unit("paisa.service")
+    machine.wait_for_open_port(7500)
+
+    machine.succeed("curl --location --fail http://localhost:7500")
+  '';
+}

pkgs/by-name/pa/paisa/package.nix

@@ -16,6 +16,7 @@
   librsvg,
   pango,
   pixman,
+  nixosTests,
 }:
 
 let
@@ -83,6 +84,10 @@ buildGoModule (finalAttrs: {
   ];
   versionCheckProgramArg = "version";
 
+  passthru.tests = {
+    inherit (nixosTests) paisa;
+  };
+
   preBuild = ''
     cp -r ${finalAttrs.frontend}/web/static ./web
   '';