How to test void functions using jest

I have a function that returns nothing. How can we write the jest test cases to verify this function?

onSilentTrackReadyToPlay(callback: (trackState: string) => void): void {
    this.trackReadySubscription = this.MediaPlayerEventEmitter.addListener(
      'silentTrackReadyToPlay',
      (trackState) => {
        if (callback) {
          callback(trackState)
        }
      },
    )
  }