def test_pop():
values = [
('a', '1'),
('b', '2'),
('c', '3'),
('a', '2'),
('a', '3'),
]
o = OrderedMultiDict(values)
assert_equals(o.pop('a'), '3')
assert_equals(o.pop('a'), '2')
assert_equals(o.pop('a'), '1')
assert_raises(KeyError, o.pop, 'a')
