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from collections import namedtuple
from msgpack import ExtType, packb, unpackb
def test_namedtuple():
T = namedtuple("T", "foo bar")
def default(o):
if isinstance(o, T):
return dict(o._asdict())
raise TypeError(f"Unsupported type {type(o)}")
packed = packb(T(1, 42), strict_types=True, use_bin_type=True, default=default)
unpacked = unpackb(packed, raw=False)
assert unpacked == {"foo": 1, "bar": 42}
def test_tuple():
t = ("one", 2, b"three", (4,))
def default(o):
if isinstance(o, tuple):
return {"__type__": "tuple", "value": list(o)}
raise TypeError(f"Unsupported type {type(o)}")
def convert(o):
if o.get("__type__") == "tuple":
return tuple(o["value"])
return o
data = packb(t, strict_types=True, use_bin_type=True, default=default)
expected = unpackb(data, raw=False, object_hook=convert)
assert expected == t
def test_tuple_ext():
t = ("one", 2, b"three", (4,))
MSGPACK_EXT_TYPE_TUPLE = 0
def default(o):
if isinstance(o, tuple):
# Convert to list and pack
payload = packb(list(o), strict_types=True, use_bin_type=True, default=default)
return ExtType(MSGPACK_EXT_TYPE_TUPLE, payload)
raise TypeError(repr(o))
def convert(code, payload):
if code == MSGPACK_EXT_TYPE_TUPLE:
# Unpack and convert to tuple
return tuple(unpackb(payload, raw=False, ext_hook=convert))
raise ValueError(f"Unknown Ext code {code}")
data = packb(t, strict_types=True, use_bin_type=True, default=default)
expected = unpackb(data, raw=False, ext_hook=convert)
assert expected == t
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