Testing Angular component with unsubscribe Error during cleanup of component

Question

I\'m testing a component which subscribe router params. Every test pass and everything works fine. But if I look in the console, I can see an error:

Error

Answer 1

You need to refactor your method ngOnDestroy as below :

ngOnDestroy() {
  if ( this.routeSubscription)
    this.routeSubscription.unsubscribe();
}