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require 'minitest/unit'
require 'test/unit/assertions'
require 'test/unit/testcase'
require 'optparse'

module Test
  module Unit
    TEST_UNIT_IMPLEMENTATION = 'test/unit compatibility layer using minitest'

    module RunCount
      @@run_count = 0

      def self.have_run?
        @@run_count.nonzero?
      end

      def run(*)
        @@run_count += 1
        super
      end

      def run_once
        return if have_run?
        return if $! # don't run if there was an exception
        yield
      end
      module_function :run_once
    end

    module Options
      def initialize(*, &block)
        @init_hook = block
        @options = nil
        super(&nil)
      end

      def option_parser
        @option_parser ||= OptionParser.new
      end

      def process_args(args = [])
        return @options if @options
        orig_args = args.dup
        options = {}
        opts = option_parser
        setup_options(opts, options)
        opts.parse!(args)
        orig_args -= args
        args = @init_hook.call(args, options) if @init_hook
        non_options(args, options)
        @help = orig_args.map { |s| s =~ /[\s|&<>$()]/ ? s.inspect : s }.join " "
        @options = options
        if @options[:parallel]
          @files = args
          @args = orig_args
        end
        options
      end

      private
      def setup_options(opts, options)
        opts.separator 'minitest options:'
        opts.version = MiniTest::Unit::VERSION

        options[:retry] = true
        options[:job_status] = nil

        opts.on '-h', '--help', 'Display this help.' do
          puts opts
          exit
        end

        opts.on '-s', '--seed SEED', Integer, "Sets random seed" do |m|
          options[:seed] = m
        end

        opts.on '-v', '--verbose', "Verbose. Show progress processing files." do
          options[:verbose] = true
          self.verbose = options[:verbose]
        end

        opts.on '-n', '--name PATTERN', "Filter test names on pattern." do |a|
          options[:filter] = a
        end

        opts.on '--jobs-status [TYPE]', [:normal, :replace],
                "Show status of jobs every file; Disabled when --jobs isn't specified." do |type|
          options[:job_status] = type || :normal
        end

        opts.on '-j N', '--jobs N', "Allow run tests with N jobs at once" do |a|
          if /^t/ =~ a
            options[:testing] = true # For testing
            options[:parallel] = a[1..-1].to_i
          else
            options[:parallel] = a.to_i
          end
        end

        opts.on '--separate', "Restart job process after one testcase has done" do
          options[:parallel] ||= 1
          options[:separate] = true
        end

        opts.on '--retry', "Retry running testcase when --jobs specified" do
          options[:retry] = true
        end

        opts.on '--no-retry', "Disable --retry" do
          options[:retry] = false
        end

        opts.on '--ruby VAL', "Path to ruby; It'll have used at -j option" do |a|
          options[:ruby] = a.split(/ /).reject(&:empty?)
        end

        opts.on '-q', '--hide-skip', 'Hide skipped tests' do
          options[:hide_skip] = true
        end

        opts.on '--show-skip', 'Show skipped tests' do
          options[:hide_skip] = false
        end

        opts.on '--color[=WHEN]',
                [:always, :never, :auto],
                "colorize the output.  WHEN defaults to 'always'", "or can be 'never' or 'auto'." do |c|
          options[:color] = c || :always
        end

        opts.on '--tty[=WHEN]',
                [:yes, :no],
                "force to output tty control.  WHEN defaults to 'yes'", "or can be 'no'." do |c|
          @tty = c != :no
        end
      end

      def non_options(files, options)
        begin
          require "rbconfig"
        rescue LoadError
          warn "#{caller(1)[0]}: warning: Parallel running disabled because can't get path to ruby; run specify with --ruby