class ParallelTests::Test::Runner

def self.execute_command(cmd, process_number, options)
  cmd = "TEST_ENV_NUMBER=#{test_env_number(process_number)} ; export TEST_ENV_NUMBER; #{cmd}"
  f = open("|#{cmd}", 'r')
  output = fetch_output(f, options)
  f.close
  {:stdout => output, :exit_status => $?.exitstatus}
end