# File lib/rspec/core/configuration.rb, line 160
      def mock_framework=(framework)
        case framework
        when Module
          settings[:mock_framework] = framework
        when String, Symbol
          require case framework.to_s
                  when /rspec/i
                    'rspec/core/mocking/with_rspec'
                  when /mocha/i
                    'rspec/core/mocking/with_mocha'
                  when /rr/i
                    'rspec/core/mocking/with_rr'
                  when /flexmock/i
                    'rspec/core/mocking/with_flexmock'
                  else
                    'rspec/core/mocking/with_absolutely_nothing'
                  end
          settings[:mock_framework] = RSpec::Core::MockFrameworkAdapter
        else
        end
      end