style: apply pyink formatting and add return type annotations

Author: enjoykumawat

src/google/adk/a2a/converters/to_adk_event.py

@@ -384,9 +384,7 @@ def convert_a2a_message_to_event(
     output_parts, _ = _convert_a2a_parts_to_adk_parts(
         a2a_message.parts, part_converter
     )
-    content_role = _a2a_role_to_content_role(
-        getattr(a2a_message, "role", None)
-    )
+    content_role = _a2a_role_to_content_role(getattr(a2a_message, "role", None))
     return _create_event(
         output_parts,
         invocation_context,

tests/unittests/a2a/converters/test_to_adk.py

@@ -420,14 +420,12 @@ def test_convert_a2a_artifact_update_to_event_none(self):
     with pytest.raises(ValueError, match="A2A artifact update cannot be None"):
       convert_a2a_artifact_update_to_event(None)
 
-  def test_convert_a2a_message_to_event_user_role(self):
+  def test_convert_a2a_message_to_event_user_role(self) -> None:
     """Test that A2A user role maps to GenAI content role 'user'."""
     a2a_part = Mock(spec=A2APart)
     a2a_part.root = Mock(spec=TextPart)
     a2a_part.root.metadata = {}
-    message = Message(
-        message_id="msg-1", role=A2ARole.user, parts=[a2a_part]
-    )
+    message = Message(message_id="msg-1", role=A2ARole.user, parts=[a2a_part])
 
     mock_genai_part = genai_types.Part.from_text(text="hello from user")
     mock_part_converter = Mock(return_value=[mock_genai_part])
@@ -441,14 +439,12 @@ def test_convert_a2a_message_to_event_user_role(self):
 
     assert event.content.role == "user"
 
-  def test_convert_a2a_message_to_event_agent_role(self):
+  def test_convert_a2a_message_to_event_agent_role(self) -> None:
     """Test that A2A agent role maps to GenAI content role 'model'."""
     a2a_part = Mock(spec=A2APart)
     a2a_part.root = Mock(spec=TextPart)
     a2a_part.root.metadata = {}
-    message = Message(
-        message_id="msg-1", role=A2ARole.agent, parts=[a2a_part]
-    )
+    message = Message(message_id="msg-1", role=A2ARole.agent, parts=[a2a_part])
 
     mock_genai_part = genai_types.Part.from_text(text="hello from agent")
     mock_part_converter = Mock(return_value=[mock_genai_part])