def test_registryiterseek_backward_empty_seek(seek_to):
from binlog.registry import RegistryIterSeek
r = RegistryIterSeek(Registry(), direction=Direction.B)
r.seek(seek_to)
assert not list(r)
def test_registryiterseek_forward_empty_unset():
from binlog.registry import RegistryIterSeek
r = RegistryIterSeek(Registry())
assert not list(r)
def test_registry_initialization():
from binlog.registry import Registry
r = Registry()
assert r.acked == list()