def test_get(self):
class Klass1: pass
class InnerClass:
pass
idc = InheritedDataChain(InnerClass)
self.assertIsNone(idc.get(Klass1))
self.assertEqual(-1, idc.get(Klass1, -1))
instance1 = idc[Klass1]
self.assertEqual(instance1, idc.get(Klass1))
def test_del(self):
class Klass1: pass
class InnerClass:
pass
idc = InheritedDataChain(InnerClass)
__ = idc[Klass1]
del idc[Klass1]
self.assertIsNone(idc.get(Klass1))