Rails - May 2008 - stub sub partials when testing partial with rspec

Hello all
I prefer to use many partials. It makes my code more DRY
Also I use rspec, and when I have to test partial with sub partials I
have a problem.

if I stub render, then my partial will not be rendered. If i do not
stub render it tries to render sub partial (and i don''t need this)

Not  very long googling did not bring the answer, so I made very dirty
and IMHO dangerous  function

def block_render_except unblocked
      ActionView::Partials.class_eval do
      public
      def self.set_unblocked partial
        @@unblocked = partial
      end
      alias_method :orig_render_partial,:render_partial
      def render_partial(partial_path, object_assigns = nil,
local_assigns = nil) #:nodoc:
        if partial_path.to_s == @@unblocked
          orig_render_partial(partial_path, object_assigns,
local_assigns)
        else
          return "  "
        end
      end
    end
    ActionView::Partials.set_unblocked unblocked
end

usage:
    block_render_except ''payments/list''
    render(:partial => "payments/list")

The question is how sick am I, and is there more pretty solution of my
problem?
Also wanted to know how this approach to design view part of
application is right?

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