# File lib/rspec/mocks/message_expectation.rb, line 469
      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
                                     n
                                   when :once
                                     1
                                   when :twice
                                     2
                                   end
      end