def test_cached_hosts(self):
instance = HostListMixin()
instance.host_ids = json.dumps([self.hosts[1].id])
self.assertListEqual(instance.hosts, [self.hosts[1]])
db_hits = len(connection.queries)
self.assertListEqual(instance.hosts, [self.hosts[1]])
self.assertEqual(db_hits, len(connection.queries))
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