test_available_transitions.py 文件源码

def test_no_locks_query_count(self):
        """Check that query count to pull in available jobs hasn't changed

        If this test fails, consider changing the EXPECTED_QUERIES, or why
        it regressed.
        """

        EXPECTED_QUERIES = 0

        #  no jobs locking this object
        host_ct_key = ContentType.objects.get_for_model(
            self.host.downcast()).natural_key()
        host_id = self.host.id

        #  Loads up the caches
        js = JobScheduler()

        reset_queries()
        js.available_transitions([(host_ct_key, host_id, ), ])

        query_sum = len(connection.queries)
        self.assertEqual(query_sum, EXPECTED_QUERIES,
            "something changed with queries! "
            "got %s expected %s" % (query_sum, EXPECTED_QUERIES))