class ParallelTests::Test::Runner

def run_tests(test_files, process_number, num_processes, options)
  require_list = test_files.map { |file| file.sub(" ", "\\ ") }.join(" ")
  cmd = "#{executable} -Itest -e '%w[#{require_list}].each { |f| require %{./\#{f}} }' -- #{options[:test_options]}"
  execute_command(cmd, process_number, num_processes, options)
end