flake.nix

@@ -64,5 +64,10 @@
         ];
       };
     };
+
+    checks.${system} = import ./nix/checks {
+      inherit self system;
+      pkgs = nixpkgs.legacyPackages.${system};
+    };
   };
 }

nix/checks/default.nix

@@ -0,0 +1,9 @@
+{
+  pkgs,
+  self,
+  system,
+}: let
+  callPackage = pkgs.lib.callPackageWith (pkgs // {inherit self;});
+in {
+  openHomepage = callPackage ./open-homepage.nix {};
+}

nix/checks/open-homepage.nix

@@ -0,0 +1,35 @@
+{
+  self,
+  nixosTest,
+}:
+nixosTest {
+  nodes = {
+    host = {
+      config,
+      lib,
+      pkgs,
+      ...
+    }: {
+      imports = [self.nixosModules.default];
+
+      services.tlaternet-webserver = {
+        enable = true;
+        listen = {
+          addr = "0.0.0.0";
+          port = 8000;
+        };
+      };
+
+      networking.firewall.allowedTCPPorts = [8000];
+    };
+
+    client = {pkgs, ...}: {};
+  };
+
+  testScript = ''
+    start_all()
+
+    host.wait_for_unit("default.target")
+    client.succeed("curl --fail http://host:8000/ >&2")
+  '';
+}