fix JOINED/PARTED messages, enhance code quality with type checks and new dependencies, update changelog for version 0.2.1

tests/test_resource.py

@@ -1,4 +1,5 @@
 """Tests for resource transfer functionality."""
+
 import hashlib
 import os
 
@@ -24,7 +25,7 @@ def test_resource_envelope_serialization():
     rid = os.urandom(8)
     payload = b"This is a test payload that is larger than typical MDU"
     sha256 = hashlib.sha256(payload).digest()
-    
+
     body = {
         B_RES_ID: rid,
         B_RES_KIND: RES_KIND_NOTICE,
@@ -32,21 +33,21 @@ def test_resource_envelope_serialization():
         B_RES_SHA256: sha256,
         B_RES_ENCODING: "utf-8",
     }
-    
+
     envelope = make_envelope(
         T_RESOURCE_ENVELOPE,
         src=src,
         room="test",
         body=body,
     )
-    
+
     # Serialize and deserialize
     encoded = encode(envelope)
     decoded = decode(encoded)
-    
+
     assert decoded[K_T] == T_RESOURCE_ENVELOPE
     assert decoded[K_SRC] == src
-    
+
     decoded_body = decoded[K_BODY]
     assert decoded_body[B_RES_ID] == rid
     assert decoded_body[B_RES_KIND] == RES_KIND_NOTICE
@@ -59,22 +60,22 @@ def test_resource_envelope_minimal():
     """Test resource envelope with minimal required fields."""
     src = os.urandom(16)
     rid = os.urandom(8)
-    
+
     body = {
         B_RES_ID: rid,
         B_RES_KIND: "blob",
         B_RES_SIZE: 1024,
     }
-    
+
     envelope = make_envelope(
         T_RESOURCE_ENVELOPE,
         src=src,
         body=body,
     )
-    
+
     encoded = encode(envelope)
     decoded = decode(encoded)
-    
+
     decoded_body = decoded[K_BODY]
     assert B_RES_SHA256 not in decoded_body
     assert B_RES_ENCODING not in decoded_body
@@ -85,12 +86,12 @@ def test_sha256_verification():
     """Test SHA256 hash computation for payload verification."""
     payload = b"Test payload for SHA256 verification"
     expected = hashlib.sha256(payload).digest()
-    
+
     # Verify we can compute and compare hashes correctly
     computed = hashlib.sha256(payload).digest()
     assert computed == expected
     assert len(computed) == 32
-    
+
     # Verify mismatch detection
     wrong_payload = b"Different payload"
     wrong_hash = hashlib.sha256(wrong_payload).digest()