def test_manager_exists(self):
"""
get_specialization_or_404 returns the specialized model instance if it
is called with a SpecializedManager instance and parameters which
correspond to a DB entry.
"""
pencil = Pencil.objects.get(name=PencilData.Technical.name)
eq_(pencil, get_specialization_or_404(
WritingImplement.specializations, name=PencilData.Technical.name
))
