nixos/bitwarden_rs: add test

pkgs/tools/security/bitwarden_rs/vault.nix

@@ -1,4 +1,4 @@
-{ stdenv, fetchurl }:
+{ stdenv, fetchurl, nixosTests }:
 
 stdenv.mkDerivation rec {
   pname = "bitwarden_rs-vault";
@@ -16,6 +16,8 @@ stdenv.mkDerivation rec {
     mv web-vault vault
   '';
 
+  passthru.tests = nixosTests.bitwarden;
+
   meta = with stdenv.lib; {
     description = "Integrates the web vault into bitwarden_rs";
     homepage = "https://github.com/dani-garcia/bw_web_builds";