Rspec: Test that controller rescues error

class SomeController < ApplicationController
  def some_action
      Model.find(params[:id])
  rescue ActiveRecord::RecordNotFound
      redirect_to {:controller => some_controller, :action_some_action}
  end

end

# Basic
it 'catches RecordNotFound error' do
   error = ActiveRecord::RecordNotFound.new
   expect {
     Model.should_receive(:find).and_raise(error)
     post :show, { :id => 2 }
   }.to_not raise_error
end

# Better: Test for the actions expected when rescuing the error
it 'redirects to some_controller#some_action' do
   error = ActiveRecord::RecordNotFound.new
   Model.should_receive(:find).and_raise(error)

   post :show, { :id => 'something that does not exist' }
   response.should redirect_to('/wherever-it-should')
end