add setstate and getstate to message for pickling

tests/test_message.py

@@ -1,4 +1,5 @@
-from uamqp.message import MessageProperties
+from uamqp.message import MessageProperties, MessageHeader, Message
+import pickle
 
 
 def test_message_proeprties():
@@ -29,3 +30,55 @@ def test_message_proeprties():
     properties = MessageProperties()
     properties.user_id = 'werid/0\0\1\t\n'
     assert properties.user_id == b'werid/0\0\1\t\n'
+
+def test_message_pickle():
+    properties = MessageProperties()
+    properties.message_id = '2'
+    properties.user_id = '1'
+    properties.to = 'dkfj'
+    properties.subject = 'dsljv'
+    properties.reply_to = "kdjfk"
+    properties.correlation_id = 'ienag'
+    properties.content_type = 'b'
+    properties.content_encoding = '39ru'
+    properties.absolute_expiry_time = 24
+    properties.creation_time = 10
+    properties.group_id = '3irow'
+    properties.group_sequence = 39
+    properties.reply_to_group_id = '39rud'
+
+    header = MessageHeader()
+    header.delivery_count = 3
+    header.time_to_live = 5
+    header.first_acquirer = 'dkfj'
+    header.durable = True
+    header.priority = 4
+
+
+    message = Message(properties=properties, header=header)
+    message.footer = {'a':2}
+    pickled = pickle.loads(pickle.dumps(message))
+
+    assert message.footer == pickled.footer
+    assert message.application_properties == pickled.application_properties
+    assert message.annotations == pickled.annotations
+    assert message.delivery_annotations == pickled.delivery_annotations
+    assert message.settled == pickled.settled
+    assert message.properties.message_id == pickled.properties.message_id
+    assert message.properties.user_id == pickled.properties.user_id
+    assert message.properties.to == pickled.properties.to
+    assert message.properties.subject == pickled.properties.subject
+    assert message.properties.reply_to == pickled.properties.reply_to
+    assert message.properties.correlation_id == pickled.properties.correlation_id
+    assert message.properties.content_type == pickled.properties.content_type
+    assert message.properties.content_encoding == pickled.properties.content_encoding
+    assert message.properties.absolute_expiry_time == pickled.properties.absolute_expiry_time
+    assert message.properties.creation_time == pickled.properties.creation_time
+    assert message.properties.group_id == pickled.properties.group_id
+    assert message.properties.group_sequence == pickled.properties.group_sequence
+    assert message.properties.reply_to_group_id == pickled.properties.reply_to_group_id
+    assert message.header.delivery_count == pickled.header.delivery_count
+    assert message.header.time_to_live == pickled.header.time_to_live
+    assert message.header.first_acquirer == pickled.header.first_acquirer
+    assert message.header.durable == pickled.header.durable
+    assert message.header.priority == pickled.header.priority