Add __init__ setup, pytest-trio and split up tests

simple_message_channels/smc.py

@@ -2,10 +2,37 @@
 
 __all__ = ["SimpleMessageChannel"]
 
+from typing import List, Optional
 
+import attr
+
+
+@attr.s(auto_attribs=True)
 class SimpleMessageChannel:
     """A simple message channel."""
 
+    message: Optional[bytes] = None
+    ptr: int = 0
+    varint: int = 0
+    factor: int = 1
+    length: int = 0
+    header: int = 0
+    state: int = 0
+    consumed: int = 0
+    max_size: int = 8 * 1024 * 1024
+    types: List = attr.Factory(list)
+
+    receiving: bool = False
+    destroyed: bool = False
+    error: Optional[Exception] = None
+
+    # TODO(decentral1se): need to lookup type of what is being passed in
+    # context: ???
+
+    # TODO(decentral1se): allow to override instead of callback interface!?
+    # onmissing: ???
+    # onmessage: ???
+
     async def send(self, channel: int, type: int, message: bytes) -> bytes:
         pass