nixos: add test for uwsgi

nixos/tests/all-tests.nix

@@ -246,6 +246,7 @@ in
   transmission = handleTest ./transmission.nix {};
   udisks2 = handleTest ./udisks2.nix {};
   upnp = handleTest ./upnp.nix {};
+  uwsgi = handleTest ./uwsgi.nix {};
   vault = handleTest ./vault.nix {};
   virtualbox = handleTestOn ["x86_64-linux"] ./virtualbox.nix {};
   wireguard = handleTest ./wireguard {};

nixos/tests/uwsgi.nix

@@ -0,0 +1,38 @@
+import ./make-test.nix ({ pkgs, ... }:
+{
+  name = "uwsgi";
+  meta = with pkgs.stdenv.lib.maintainers; {
+    maintainers = [ lnl7 ];
+  };
+  machine = { pkgs, ... }: {
+    services.uwsgi.enable = true;
+    services.uwsgi.plugins = [ "python3" ];
+    services.uwsgi.instance = {
+      type = "emperor";
+      vassals.hello = {
+        type = "normal";
+        master = true;
+        workers = 2;
+        http = ":8000";
+        module = "wsgi:application";
+        chdir = pkgs.writeTextDir "wsgi.py" ''
+          from flask import Flask
+          application = Flask(__name__)
+
+          @application.route("/")
+          def hello():
+              return "Hello World!"
+        '';
+        pythonPackages = self: with self; [ flask ];
+      };
+    };
+  };
+
+  testScript =
+    ''
+      $machine->waitForUnit('multi-user.target');
+      $machine->waitForUnit('uwsgi.service');
+      $machine->waitForOpenPort(8000);
+      $machine->succeed('curl -v 127.0.0.1:8000 | grep "Hello World!"');
+    '';
+})