def test_contains(self):
c = PrefixCache(Word, 'normalized_spelling')
c.seed([u'ab-starting-words'])
self.assertEqual(c.items(), [(u'ab', set([u'abc']))])
self.assertTrue(c.contains(u'abc'))
self.assertTrue(c.contains(u'efg'))
self.assertEqual(c.items(), [(u'ab', set([u'abc'])),
(u'ef', set([u'efg']))])
