jestFakeTimersAreEnabled.ts

export const jestFakeTimersAreEnabled = () => {
  /* istanbul ignore else */
  if (typeof jest !== 'undefined' && jest !== null) {
    return (
      // legacy timers
      jest.isMockFunction(setTimeout) ||
      // modern timers
      Object.prototype.hasOwnProperty.call(setTimeout, 'clock')
    )
  }
  // istanbul ignore next
  return false
}