def test_popitem(self):
'''
popitem().
'''
# Create dict.
pairs = [('a', 11), ('b', 22)]
sd = Superdict(pairs)
# Pop everything.
s = set(sd.popitem() for _ in range(len(sd)))
aEq(s, set(pairs))
# Nothing remains.
with aRaz(AERR): sd.a
with aRaz(AERR): sd.b
with aRaz(KERR): sd['a']
with aRaz(KERR): sd['b']
