def METHOD_NAME(self, br, expect_delta):
    delta_counters = br.read_border_routing_counters_delta()
    self.assertEqual(set(delta_counters.keys()), set(expect_delta.keys()))
    for key in delta_counters:
        self.assertEqual(delta_counters[key][0], expect_delta[key])
        self.assertGreater(delta_counters[key][1], 0)