assertTrue(getSubscription("GroupFollower", userId, groupId));
getEntityManager().clear();
sut = new ChangeStreamActivitySubscriptionDbMapper(EntityType.GROUP);
((BaseDomainMapper) sut).setEntityManager(getEntityManager());
sut.execute(new ChangeStreamActivitySubscriptionMapperRequest(userId, groupId, false, false));
getEntityManager().clear();
assertFalse(getSubscription("GroupFollower", userId, groupId));
assertFalse(getCoordOnly("GroupFollower", userId, groupId));
}