test: increased cb test coverage

test/unit/core/test_agent_system.py

@@ -2,7 +2,7 @@
 
 import asyncio
 import logging
-from unittest.mock import AsyncMock
+from unittest.mock import AsyncMock, MagicMock
 
 import pytest
 
@@ -70,3 +70,142 @@ async def test_get_agent():
     agent = ConcreteTestAgent("registrant")
     assert AgentDirectory.get("registrant") == agent
     assert AgentDirectory.get("non_existent") is None
+
+
+class DummyAgent(BaseAgent):
+    async def setup(self):
+        pass  # we will test this separately
+
+    async def handle_message(self, msg: InternalMessage):
+        self.last_handled = msg
+
+
+@pytest.mark.asyncio
+async def test_base_agent_setup_is_noop():
+    agent = DummyAgent("dummy")
+
+    # Should simply return without error
+    assert await agent.setup() is None
+
+
+@pytest.mark.asyncio
+async def test_send_to_local_agent(monkeypatch):
+    sender = DummyAgent("sender")
+    target = DummyAgent("receiver")
+
+    # Fake logger
+    sender.logger = MagicMock()
+
+    # Patch inbox.put
+    target.inbox.put = AsyncMock()
+
+    message = InternalMessage(to="receiver", sender="sender", body="hello")
+
+    await sender.send(message)
+
+    target.inbox.put.assert_awaited_once_with(message)
+    sender.logger.debug.assert_called_once()
+
+
+@pytest.mark.asyncio
+async def test_process_inbox_calls_handle_message(monkeypatch):
+    agent = DummyAgent("dummy")
+    agent.logger = MagicMock()
+
+    # Make agent running so loop triggers
+    agent._running = True
+
+    # Prepare inbox to give one message then stop
+    msg = InternalMessage(to="dummy", sender="x", body="test")
+
+    async def get_once():
+        agent._running = False  # stop after first iteration
+        return msg
+
+    agent.inbox.get = AsyncMock(side_effect=get_once)
+    agent.handle_message = AsyncMock()
+
+    await agent._process_inbox()
+
+    agent.handle_message.assert_awaited_once_with(msg)
+
+
+@pytest.mark.asyncio
+async def test_receive_internal_zmq_loop_success(monkeypatch):
+    agent = DummyAgent("dummy")
+    agent.logger = MagicMock()
+    agent._running = True
+
+    mock_socket = MagicMock()
+    mock_socket.recv_multipart = AsyncMock(
+        side_effect=[
+            (
+                b"topic",
+                InternalMessage(to="dummy", sender="x", body="hi").model_dump_json().encode(),
+            ),
+            asyncio.CancelledError(),  # stop loop
+        ]
+    )
+    agent._internal_sub_socket = mock_socket
+
+    agent.inbox.put = AsyncMock()
+
+    await agent._receive_internal_zmq_loop()
+
+    agent.inbox.put.assert_awaited()  # message forwarded
+
+
+@pytest.mark.asyncio
+async def test_receive_internal_zmq_loop_exception_logs_error():
+    agent = DummyAgent("dummy")
+    agent.logger = MagicMock()
+    agent._running = True
+
+    mock_socket = MagicMock()
+    mock_socket.recv_multipart = AsyncMock(
+        side_effect=[Exception("boom"), asyncio.CancelledError()]
+    )
+    agent._internal_sub_socket = mock_socket
+
+    agent.inbox.put = AsyncMock()
+
+    await agent._receive_internal_zmq_loop()
+
+    agent.logger.exception.assert_called_once()
+    assert "Could not process ZMQ message." in agent.logger.exception.call_args[0][0]
+
+
+@pytest.mark.asyncio
+async def test_base_agent_handle_message_not_implemented():
+    class RawAgent(BaseAgent):
+        async def setup(self):
+            pass
+
+    agent = RawAgent("raw")
+
+    msg = InternalMessage(to="raw", sender="x", body="hi")
+
+    with pytest.raises(NotImplementedError):
+        await BaseAgent.handle_message(agent, msg)
+
+
+@pytest.mark.asyncio
+async def test_base_agent_setup_abstract_method_body_executes():
+    """
+    Covers the 'pass' inside BaseAgent.setup().
+    Since BaseAgent is abstract, we do NOT instantiate it.
+    We call the coroutine function directly on BaseAgent and pass a dummy self.
+    """
+
+    class Dummy:
+        """Minimal stub to act as 'self'."""
+
+        pass
+
+    stub = Dummy()
+
+    # Call BaseAgent.setup() as an unbound coroutine, passing stub as 'self'
+    result = await BaseAgent.setup(stub)
+
+    # The method contains only 'pass', so it returns None
+    assert result is None