pgweb: add NixOS test (#382268)

nixos/tests/all-tests.nix

@@ -822,6 +822,7 @@ in {
   pgadmin4 = handleTest ./pgadmin4.nix {};
   pgbouncer = handleTest ./pgbouncer.nix {};
   pghero = runTest ./pghero.nix;
+  pgweb = runTest ./pgweb.nix;
   pgmanage = handleTest ./pgmanage.nix {};
   phosh = handleTest ./phosh.nix {};
   photonvision = handleTest ./photonvision.nix {};

nixos/tests/pgweb.nix

@@ -0,0 +1,32 @@
+{ lib, ... }:
+{
+  name = "pgweb";
+  meta.maintainers = [ lib.maintainers.zupo ];
+
+  nodes.machine =
+    { config, pkgs, ... }:
+    {
+      services.postgresql = {
+        enable = true;
+        authentication = ''
+          host    all   all   ::1/128        trust
+        '';
+      };
+      environment.systemPackages = [ pkgs.pgweb ];
+
+      systemd.services.myservice = {
+        serviceConfig = {
+          ExecStart = "${pkgs.pgweb}/bin/pgweb --url postgresql://postgres@localhost:5432/postgres";
+        };
+        path = [ pkgs.getent ];
+        after = [ "postgresql.service" ];
+        wantedBy = [ "multi-user.target" ];
+      };
+    };
+
+  testScript = ''
+    machine.wait_for_unit("myservice.service")
+    machine.wait_for_open_port(8081)
+    machine.wait_until_succeeds("curl -sSf localhost:8081 | grep '<div class=\"title\">Table Information</div>'")
+  '';
+}