Remove default_packet for msgpack

mashumaro/serializer/msgpack.py

@@ -1,19 +1,12 @@
-import datetime
-
 import msgpack
 
 from mashumaro.serializer.base import DataClassDictMixin
 
 
-def default_packer(o):
-    if isinstance(o, datetime.datetime):
-        return o.timestamp()
-
-
 class DataClassMessagePackMixin(DataClassDictMixin):
     def to_msgpack(self):
         d = self.to_dict(use_bytes=True)
-        return msgpack.packb(d, default=default_packer, use_bin_type=True)
+        return msgpack.packb(d, use_bin_type=True)
 
     @classmethod
     def from_msgpack(cls, data: bytes):

setup.py

@@ -5,7 +5,7 @@
 
 setup(
     name="mashumaro",
-    version="1.0",
+    version="1.1",
     description="Fast serialization framework on top of dataclasses",
     long_description=open('README.md').read(),
     long_description_content_type='text/markdown',

tests/test_msgpack.py

@@ -1,5 +1,6 @@
 from dataclasses import dataclass
 from typing import List
+from datetime import datetime
 
 import msgpack
 
@@ -20,3 +21,12 @@ class DataClass(DataClassMessagePackMixin):
         x: List[int]
     dumped = msgpack.packb({'x': [1, 2, 3]})
     assert DataClass.from_msgpack(dumped) == DataClass([1, 2, 3])
+
+
+def test_to_msg_pack_datetime():
+    @dataclass
+    class DataClass(DataClassMessagePackMixin):
+        x: datetime
+    dt = datetime(2018, 10, 29, 12, 46, 55, 308495)
+    dumped = msgpack.packb({'x': dt.isoformat()})
+    assert DataClass(dt).to_msgpack() == dumped