testing that an object really has been destroyed in unittests

[Stefan Kost <kost imn htwk-leipzig de>]

hi hi,

has anyone an idea how I can verify that after a
  g_object_unref(myobj);
the object has been destroyed.

I would like to do this in unit-tests.
Obviously I can't just check for
  G_IS_OBJECT(app)==FALSE
afterwards.

So to clarify this for me:
Does g_object_unref() works with circular stuff?
If not then am I right that the ref-ct *must* be ==1 right before the last
g_object_unref(myobj); to destroy the object, as the implementation of
g_object_unfref can't trigger anything that would further decrement the ref_ct
of my object.

Stefan (who hopes that anyone understands what I am talking about).
-- 
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