Different Singleton instances with JUnit tests

Question

I have a standalone singleton which successfully passes the test. But with a group of tests this fails since once a singleton is defined it does not allow to reset the instance.

Answer 1

You can add a method to destroy the singleton, for example destroyMe(); where you deinitialize everything and set the instance of the singleton to null.

  public void destroyMe(){
   this.instance = null;
   //-- other stuff to turn it off.
}

I will leave synchronization problems though ;)

But why do you need to re-initialize your singleton for each test? It should not differ based on the concept of the singleton.