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12 changes: 12 additions & 0 deletions distributed/protocol/tests/test_to_pickle.py
Original file line number Diff line number Diff line change
Expand Up @@ -4,10 +4,22 @@
from dask.highlevelgraph import HighLevelGraph, MaterializedLayer

from distributed.client import Client
from distributed.protocol import dumps, loads
from distributed.protocol.serialize import ToPickle
from distributed.utils_test import gen_cluster


def test_ToPickle():
class Foo:
def __init__(self, data):
self.data = data

msg = {"x": ToPickle(Foo(123))}
frames = dumps(msg)
out = loads(frames)
assert out["x"].data == 123


class NonMsgPackSerializableLayer(MaterializedLayer):
"""Layer that uses non-msgpack-serializable data"""

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