nixos/homer: add tests

nixos/tests/all-tests.nix

···
   hedgedoc = handleTest ./hedgedoc.nix {};
   herbstluftwm = handleTest ./herbstluftwm.nix {};
   homebox = handleTest ./homebox.nix {};
+  homer = handleTest ./homer {};
   homepage-dashboard = handleTest ./homepage-dashboard.nix {};
   honk = runTest ./honk.nix;
   installed-tests = pkgs.recurseIntoAttrs (handleTest ./installed-tests {});

nixos/tests/homer/caddy.nix

···
+import ../make-test-python.nix (
+  { lib, ... }:
+
+  {
+    name = "homer-caddy";
+    meta.maintainers = with lib.maintainers; [ stunkymonkey ];
+
+    nodes.machine =
+      { pkgs, ... }:
+      {
+        services.homer = {
+          enable = true;
+          virtualHost = {
+            caddy.enable = true;
+            domain = "localhost:80";
+          };
+          settings = {
+            title = "testing";
+          };
+        };
+      };
+
+    testScript = ''
+      machine.wait_for_unit("caddy.service")
+      machine.wait_for_open_port(80)
+      machine.succeed("curl --fail --show-error --silent http://localhost:80/ | grep '<title>Homer</title>'")
+      machine.succeed("curl --fail --show-error --silent http://localhost:80/assets/config.yml | grep 'title: testing'")
+    '';
+  }
+)

nixos/tests/homer/default.nix

···
+{ system, pkgs, ... }:
+
+{
+  caddy = import ./caddy.nix { inherit system pkgs; };
+  nginx = import ./nginx.nix { inherit system pkgs; };
+}

nixos/tests/homer/nginx.nix

···
+import ../make-test-python.nix (
+  { lib, ... }:
+
+  {
+    name = "homer-nginx";
+    meta.maintainers = with lib.maintainers; [ stunkymonkey ];
+
+    nodes.machine =
+      { pkgs, ... }:
+      {
+        services.homer = {
+          enable = true;
+          virtualHost = {
+            nginx.enable = true;
+            domain = "localhost";
+          };
+          settings = {
+            title = "testing";
+          };
+        };
+      };
+
+    testScript = ''
+      machine.wait_for_unit("nginx.service")
+      machine.wait_for_open_port(80)
+      machine.succeed("curl --fail --show-error --silent http://localhost:80/ | grep '<title>Homer</title>'")
+      machine.succeed("curl --fail --show-error --silent http://localhost:80/assets/config.yml | grep 'title: testing'")
+    '';
+  }
+)

pkgs/by-name/ho/homer/package.nix

···
   nodejs,
   dart-sass,
   nix-update-script,
+  nixosTests,
 }:
 stdenvNoCC.mkDerivation rec {
   pname = "homer";
···
     runHook postInstall
   '';
 
-  passthru.updateScript = nix-update-script { };
+  passthru = {
+    updateScript = nix-update-script { };
+    tests = {
+      inherit (nixosTests.homer) caddy nginx;
+    };
+  };
 
   meta = with lib; {
     description = "A very simple static homepage for your server.";