[Solved] org.mockito.exceptions.misusing.RedundantListenerException

RedundantListenerException is RuntimeException and sub class of MockitoException. This occurred by Mockito framework when  instance of MockitoListener is being added to Mockito Framework and there is already a listener with this implementation type registered.

Note : It is ok to add multiple different implementations of the same listener interface type.


  • RedundantListenerException(String message) : Will throw exception with message.




If you are trying to add the listener but a listener of the same type was already added (and not removed) this method will throw RedundantListenerException. This is a safeguard to ensure users actually remove the listeners via removeListener. We do not anticipate the use case where adding the same listener type multiple times is useful.



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