'Test the sequence generator with rollover'

def test_sequence_generator_with_rollover(self):

    from boto.sdb.db.sequence import SequenceGenerator
    gen = SequenceGenerator('ABC', rollover=True)
    assert (gen('') == 'A')
    assert (gen('A') == 'B')
    assert (gen('B') == 'C')
    assert (gen('C') == 'A')
