Function validateLogger

lib/logger-factory.js:60–73

* Determines if a provided logger object meets the requirements * of a Fastify compatible logger. * * @param {object} logger Object to validate. * @param {boolean?} strict `true` if the object must be a logger (always throw if any methods missing) * * @returns {boolean} `true` when the logger

(logger, strict)

 * missing required methods.
 */
function validateLogger (logger, strict) {
  const methods = ['info', 'error', 'debug', 'fatal', 'warn', 'trace', 'child']
  const missingMethods = logger
    ? methods.filter(method => !logger[method] || typeof logger[method] !== 'function')
    : methods

  if (!missingMethods.length) {
    return true
  } else if ((missingMethods.length === methods.length) && !strict) {
    return false
  } else {
    throw FST_ERR_LOG_INVALID_LOGGER(missingMethods.join(','))
  }
}

function createLogger (options) {
  if (options.logger && options.loggerInstance) {