pythonPackages.selenium: add test to related nixos test

It'd certainly be better to have a selenium-specific test, but there is
currently none so this will be better than nothing.

pkgs/development/python-modules/selenium/default.nix

@@ -6,6 +6,7 @@
 , geckodriver
 , urllib3
 , xorg
+, nixosTests
 }:
 
 
@@ -47,6 +48,10 @@ buildPythonPackage rec {
     cp -v x_ignore_nofocus.so selenium/webdriver/firefox/${if stdenv.is64bit then "amd64" else "x86"}/
   '';
 
+  passthru.tests = {
+    testing-bitwarden = nixosTests.bitwarden;
+  };
+
   meta = with lib; {
     description = "The selenium package is used to automate web browser interaction from Python";
     homepage = "http://www.seleniumhq.org";