code: function createNoFilesMatchPatternError(message, pattern) {
    var err = new Error(message);
    err.code = 'ERR_MOCHA_NO_FILES_MATCH_PATTERN';
    err.pattern = pattern;
    return err;
  }
docs: @module Errors
   
  Factory functions to create throwable error objects
   
  Creates an error object to be thrown when no files to be tested could be found using specified pattern.
  
  @public
  @param {string} message - Error message to be displayed.
  @param {string} pattern - User-specified argument value.
  @returns {Error} instance detailing the error condition