def METHOD_NAME():
    rds = dns.rdataset.from_text(
        "in", "srv", 300, "1 0 1234 a", "1 0 1234 b", "1 0 1234 c"
    )
    seen = set()
    for i in range(100):
        po = rds.processing_order()
        assert len(po) == 3
        for j in range(3):
            assert rds[j] in po
        seen.add(tuple(po))
    assert len(seen) == 6