Function fail

deps/v8/test/intl/assert.js:101–106

* Throws an exception containing the user_message (if any) and the values.

(expected, found, user_message = '')

 * Throws an exception containing the user_message (if any) and the values.
 */
function fail(expected, found, user_message = '') {
  // TODO(cira): Replace String with PrettyPrint for objects and arrays.
  var message = 'Failure' + (user_message ? ' (' + user_message + ')' : '') +
      ': expected <' + String(expected) + '>, found <' + String(found) + '>.';
  throw new Error(message);
}


/**