nixos: Add basic test of novacomd

nixos/tests/novacomd.nix

@@ -0,0 +1,28 @@
+import ./make-test.nix ({ pkgs, ...} : {
+  name = "novacomd";
+  meta = with pkgs.stdenv.lib.maintainers; {
+    maintainers = [ dtzWill ];
+  };
+
+  machine = { config, pkgs, ... }: {
+    services.novacomd.enable = true;
+  };
+
+  testScript = ''
+    startAll;
+
+    $machine->waitForUnit("novacomd.service");
+
+    # Check status and try connecting with novacom
+    $machine->succeed("systemctl status novacomd.service >&2");
+    $machine->succeed("novacom -l");
+
+    # Stop the daemon, double-check novacom fails if daemon isn't working
+    $machine->stopJob("novacomd");
+    $machine->fail("novacom -l");
+
+    # And back again for good measure
+    $machine->startJob("novacomd");
+    $machine->succeed("novacom -l");
+  '';
+})