class ChefSpec::SoloRunner

def expand_run_list!
  # Recent versions of Chef include a method to expand the +run_list+,
  # setting the correct instance variables on the policy builder. We use
  # that, unless the user is running an older version of Chef which
  # doesn't include this method.
  if client.respond_to?(:expanded_run_list)
    client.expanded_run_list
  else
    # Sadly, if we got this far, it means that the current Chef version
    # does not include the +expanded_run_list+ method, so we need to
    # manually expand the +run_list+. The following code has been known
    # to make kittens cry, so please read with extreme caution.
    client.instance_eval do
      @run_list_expansion = expand_run_list
      @expanded_run_list_with_versions = @run_list_expansion.recipes.with_version_constraints_strings
    end
  end
end