code: function _failure(errors, test, result) {
    process.stdout.write('.'.red);
    failures.push({ errors: errors, test: test, result: result });
  }
docs: Failure event handler, displays a red dot and register failure.
  
  @param {Array} check errors
  @param {Object} test: test expectation (exitcode, output)
  @param {Object} result: command execution result (exitcode, output)