def METHOD_NAME(self):
    # Ensure default comparison compares id() of args
    L = []
    for i in range(10):
        L.insert(len(L)//2, Empty())
    for a in L:
        for b in L:
            self.assertEqual(a == b, id(a) == id(b),
                             'a=%r, b=%r' % (a, b))