# File lib/rspec-puppet/matchers/run.rb, line 4
      def matches?(func_obj)
        @func_obj = func_obj
        if @params
          if Puppet.version.to_f >= 4.0 and ! @func_obj.respond_to?(:receiver)
            @func = lambda { func_obj.call({}, *@params) }
          else
            @func = lambda { func_obj.call(@params) }
          end
        else
          if Puppet.version.to_f >= 4.0 and ! @func_obj.respond_to?(:receiver)
            @func = lambda { func_obj.call({}) }
          else
            @func = lambda { func_obj.call }
          end
        end

        @has_returned = false
        begin
          @actual_return = @func.call
          @has_returned = true
        rescue Exception => e
          @actual_error = e
        end

        if @has_expected_error
          if @has_returned
            return false
          elsif @actual_error.is_a?(@expected_error)
            case @expected_error_message
            when nil
              return true
            when Regexp
              return !!(@actual_error.message =~ @expected_error_message)
            else
              return @actual_error.message == @expected_error_message
            end
          else # error did not match
            return false
          end
        elsif @has_expected_return
          if !@has_returned
            return false
          else
            case @expected_return
            when Regexp
              return !!(@actual_return =~ @expected_return)
            else
              return @actual_return == @expected_return
            end
          end
        else
          return @has_returned
        end
      end