class ParallelTests::CLI

def execute_in_parallel(items, num_processes, options)
  Tempfile.open 'parallel_tests-lock' do |lock|
    mode = (RUBY_ENGINE == "jruby" ? :in_threads : :in_processes)
    return Parallel.map(items, mode => num_processes) do |item|
      result = yield(item)
      report_output(result, lock) if options[:serialize_stdout]
      result
    end
  end
end