# File lib/rspec/mocks/message_expectation.rb, line 449
      def set_expected_received_count(relativity, n)
        @at_least = (relativity == :at_least)
        @at_most  = (relativity == :at_most)
        @exactly  = (relativity == :exactly)
        @expected_received_count = case n
                                   when Numeric then n
                                   when :once   then 1
                                   when :twice  then 2
                                   end
      end