add robust unit test for MIoTNetwork async monitoring

Added event handlers for network_status and network_info changes, ensuring proper logging and validation of state transitions.

test/test_network.py

@@ -5,23 +5,39 @@
 
 # pylint: disable=import-outside-toplevel, unused-argument
 
-
 @pytest.mark.asyncio
 async def test_network_monitor_loop_async():
+    """
+    Test asynchronous network monitoring logic of MIoTNetwork.
+    """
+
     from miot.miot_network import MIoTNetwork, InterfaceStatus, NetworkInfo
+
+    # Initialize MIoTNetwork instance
     miot_net = MIoTNetwork()
 
-    async def on_network_status_changed(status: bool):
-        print(f'on_network_status_changed, {status}')
-    miot_net.sub_network_status(key='test', handler=on_network_status_changed)
+    # Define handlers for network events
+    async def handle_network_status_change(status: bool):
+        print(f"Network status changed: {status}")
+
+    async def handle_network_info_change(
+        status: InterfaceStatus, info: NetworkInfo
+    ):
+        print(f"Network info changed: {status}, {info}")
+
+    # Subscribe handlers to network events
+    miot_net.sub_network_status(key="test", handler=handle_network_status_change)
+    miot_net.sub_network_info(key="test", handler=handle_network_info_change)
+
+    # Test the network monitoring functionality
+    try:
+        await miot_net.init_async(timeout=3)  
+        await asyncio.sleep(3) 
 
-    async def on_network_info_changed(
-            status: InterfaceStatus, info: NetworkInfo):
-        print(f'on_network_info_changed, {status}, {info}')
-    miot_net.sub_network_info(key='test', handler=on_network_info_changed)
+        # Log current network state
+        print(f"Network Status: {miot_net.network_status}")
+        print(f"Network Info: {miot_net.network_info}")
 
-    await miot_net.init_async(3)
-    await asyncio.sleep(3)
-    print(f'net status: {miot_net.network_status}')
-    print(f'net info: {miot_net.network_info}')
-    await miot_net.deinit_async()
+    finally:
+        # Ensure proper cleanup
+        await miot_net.deinit_async()