bat: Add test

pkgs/tools/misc/bat/default.nix

@@ -1,4 +1,5 @@
 { stdenv
+, nixosTests
 , rustPlatform
 , fetchFromGitHub
 , pkg-config
@@ -38,6 +39,8 @@ rustPlatform.buildRustPackage rec {
       --prefix PATH : "${stdenv.lib.makeBinPath [ less ]}"
   '';
 
+  passthru.tests = { inherit (nixosTests) bat; };
+
   meta = with stdenv.lib; {
     description = "A cat(1) clone with syntax highlighting and Git integration";
     homepage = "https://github.com/sharkdp/bat";