public void HandlesObserver()
{
var crud = new BeanCrud(new InMemoryStorage(), null, null, null);
var auditorLight = new AuditorLight();
var tracer = new TracingObserver();
crud.AddObserver(auditorLight);
crud.AddObserver(tracer);
Assert.True(crud.HasObservers());
Assert.True(crud.IsObserverLoaded <AuditorLight>());
Assert.True(crud.IsObserverLoaded <TracingObserver>());
crud.AddObserver(auditorLight);
Assert.Equal(auditorLight, crud.GetObserver <AuditorLight>());
crud.RemoveObserver <TracingObserver>();
Assert.False(crud.IsObserverLoaded <TracingObserver>());
Assert.True(crud.HasObservers());
}