class ParallelTests::Test::Runner

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