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

Adding to @David Brown's response the code below is what worked for me.

      .subscribe(res => {
          ...
        },
        error => Observable.throw(error)
      )