132             class B(Singleton):   class
135                     super(B, self).__init__()
139             b1 = B.getInstance('arg1 value', 'arg2 value')
140             b2 = B.getInstance()
148             class B(Singleton):   class
151                     super(B, self).__init__()
155             self.assertRaises(SingletonException, B.getInstance)
185             class B(Singleton):   class
188                     super(B, self).__init__()
192             b1 = B.getInstance('arg1 value', 'arg2 value')
193             self.assertRaises(SingletonException, B, 'arg1 value', 'arg2 value')
199             class B(A):   class
201                     super(B, self).__init__()
208             b = B.getInstance()
212             B._forgetClassInstanceReferenceForTesting()
214             B._forgetClassInstanceReferenceForTesting()
215             b = B.getInstance()