A simple flake setup with tests and VM support

nix/tests/test1.nix

@@ -0,0 +1,25 @@
+{ pkgs ? import <nixpkgs> {} }:
+
+pkgs.nixosTest {
+  name = "matrix-login-test";
+  
+  nodes = {
+    machine = { config, pkgs, ... }: {
+      imports = [
+        ../configuration.nix
+      ];
+      
+      # Test configuration
+      virtualisation.memorySize = 2048;
+    };
+  };
+
+  testScript = ''
+    start_all()
+    machine.wait_for_unit("multi-user.target")
+
+    with subtest("SSH service test"):
+        machine.wait_for_unit("sshd.service")
+        machine.wait_for_open_port(22)
+  '';
+}