tests/homepage-dashboard: add tests for homepage

nixos/tests/all-tests.nix

···
   hbase3 = handleTest ./hbase.nix { package=pkgs.hbase3; };
   hedgedoc = handleTest ./hedgedoc.nix {};
   herbstluftwm = handleTest ./herbstluftwm.nix {};
+  homepage-dashboard = handleTest ./homepage-dashboard.nix {};
   installed-tests = pkgs.recurseIntoAttrs (handleTest ./installed-tests {});
   invidious = handleTest ./invidious.nix {};
   oci-containers = handleTestOn ["aarch64-linux" "x86_64-linux"] ./oci-containers.nix {};

nixos/tests/homepage-dashboard.nix

···
+import ./make-test-python.nix ({ lib, ... }: {
+  name = "homepage-dashboard";
+  meta.maintainers = with lib.maintainers; [ jnsgruk ];
+
+  nodes.machine = { pkgs, ... }: {
+    services.homepage-dashboard.enable = true;
+  };
+
+  testScript = ''
+    machine.wait_for_unit("homepage-dashboard.service")
+    machine.wait_for_open_port(8082)
+    machine.succeed("curl --fail http://localhost:8082/")
+  '';
+})