docs: function check(result, test) {
  
    const CHECKERS = [ _checkExitCode, _checkOutput, _checkStdout, _checkStderr ];
    var errors = [];
  
    CHECKERS.forEach(function (checker) {
      var error = checker(result, test);
      if (error) {
        errors.push(error);
      }
    });
    
    return errors;
  }