_prepare_run

# File lib/test/unit.rb, line 682
      def _prepare_run(suites, type)
        options[:job_status] ||= :replace if @tty && !@verbose
        case options[:color]
        when :always
          color = true
        when :auto, nil
          color = @options[:job_status] == :replace && /dumb/ !~ ENV["TERM"]
        else
          color = false
        end
        if color
          # dircolors-like style
          colors = (colors = ENV['TEST_COLORS']) ? Hash[colors.scan(/(\w+)=([^:]*)/)] : {}
          @passed_color = "\e[#{colors["pass"] || "32"}m"
          @failed_color = "\e[#{colors["fail"] || "31"}m"
          @skipped_color = "\e[#{colors["skip"] || "33"}m"
          @reset_color = "\e[m"
        else
          @passed_color = @failed_color = @skipped_color = @reset_color = ""
        end
        if color or @options[:job_status] == :replace
          @verbose = !options[:parallel]
          @output = StatusLineOutput.new(self)
        end
        if /\A\/(.*)\/\z/ =~ (filter = options[:filter])
          filter = Regexp.new($1)
        end
        type = "#{type}_methods"
        total = if filter
                  suites.inject(0) {|n, suite| n + suite.send(type).grep(filter).size}
                else
                  suites.inject(0) {|n, suite| n + suite.send(type).size}
                end
        @test_count = 0
        @total_tests = total.to_s(10)
      end