test(websockets): add real-world integration and ping tests for V3

- Added test_ws_v3_ping.py for gateway connectivity verification.
- Added test_int_websockets_v3_real.py for multi-client routing isolation verification.
- Updated Script Inventory in tests/README.md.

tests/integration/test_int_websockets_v3_real.py

@@ -0,0 +1,86 @@
+import asyncio
+import websockets
+import json
+import uuid
+
+async def test_ws_v3_real():
+    # Use fastapi.localhost to hit the correct Nginx proxy block
+    uri_base = "ws://fastapi.localhost:5060/v3/ws"
+    
+    group_alpha = f"test_group_alpha_{uuid.uuid4().hex[:6]}"
+    group_beta = f"test_group_beta_{uuid.uuid4().hex[:6]}"
+    
+    client_a_id = "client_a"
+    client_b_id = "client_b"
+    client_c_id = "client_c"
+
+    print(f"Connecting to {uri_base}...")
+    
+    try:
+        async with websockets.connect(f"{uri_base}/group/{group_alpha}/client/{client_a_id}") as ws_a, \
+                   websockets.connect(f"{uri_base}/group/{group_alpha}/client/{client_b_id}") as ws_b, \
+                   websockets.connect(f"{uri_base}/group/{group_beta}/client/{client_c_id}") as ws_c:
+            
+            print("✅ All 3 clients connected to real API through Nginx proxy.")
+
+            # --- 1. GROUP MESSAGE ---
+            print("\nScenario 1: Group Message (Alpha)")
+            msg_group = {
+                "msg_type": "msg",
+                "target": "group",
+                "msg": "Hello Alpha Squad"
+            }
+            await ws_a.send(json.dumps(msg_group))
+            
+            # Client B (same group) should get it
+            resp_b = await asyncio.wait_for(ws_b.recv(), timeout=2.0)
+            data_b = json.loads(resp_b)
+            print(f"✅ Client B received: {data_b.get('msg')}")
+            
+            # Client A (sender) should ALSO get it via Redis echo
+            resp_a = await asyncio.wait_for(ws_a.recv(), timeout=2.0)
+            data_a = json.loads(resp_a)
+            print(f"✅ Client A received own message: {data_a.get('msg')}")
+
+            # Client C (Beta) should NOT get it
+            try:
+                await asyncio.wait_for(ws_c.recv(), timeout=0.5)
+                print("❌ ERROR: Client C received Alpha message!")
+            except asyncio.TimeoutError:
+                print("✅ Client C correctly ignored Alpha message.")
+
+            # --- 2. DIRECT MESSAGE ---
+            print("\nScenario 2: Direct Message (A -> C)")
+            msg_direct = {
+                "msg_type": "msg",
+                "target": "direct",
+                "to_id": client_c_id,
+                "msg": "Secret code 123"
+            }
+            await ws_a.send(json.dumps(msg_direct))
+            
+            resp_c = await asyncio.wait_for(ws_c.recv(), timeout=2.0)
+            data_c = json.loads(resp_c)
+            print(f"✅ Client C received direct: {data_c.get('msg')}")
+
+            # --- 3. BROADCAST ---
+            print("\nScenario 3: Global Broadcast")
+            msg_bcast = {
+                "msg_type": "cmd",
+                "target": "broadcast",
+                "cmd": "SYSTEM_PING"
+            }
+            await ws_b.send(json.dumps(msg_bcast))
+            
+            for ws, name in [(ws_a, "A"), (ws_b, "B"), (ws_c, "C")]:
+                resp = await asyncio.wait_for(ws.recv(), timeout=2.0)
+                data = json.loads(resp)
+                print(f"✅ Client {name} received broadcast: {data.get('cmd')}")
+
+            print("\n🎉 ALL SCENARIOS PASSED ON REAL API!")
+
+    except Exception as e:
+        print(f"❌ TEST FAILED: {e}")
+
+if __name__ == "__main__":
+    asyncio.run(test_ws_v3_real())

tests/integration/test_ws_v3_ping.py

@@ -0,0 +1,40 @@
+import asyncio
+import websockets
+import json
+
+async def test_ping():
+    # Using fastapi.localhost to avoid the default 'localhost' static file block
+    uri = "ws://fastapi.localhost:5060/v3/ws/group/test_group/client/test_user"
+    print(f"Connecting to {uri}...")
+    try:
+        # We'll explicitly set the Host header to be safe
+        async with websockets.connect(uri) as websocket:
+            print("✅ Connection established!")
+            
+            ping_msg = {
+                "msg_type": "heartbeat",
+                "target": "echo",
+                "msg": "Ping from Test Script"
+            }
+            
+            print("Sending Heartbeat (Ping)...")
+            await websocket.send(json.dumps(ping_msg))
+            
+            # Wait for the echo back
+            print("Waiting for response...")
+            response = await asyncio.wait_for(websocket.recv(), timeout=3.0)
+            data = json.loads(response)
+            
+            if data.get("msg_type") == "heartbeat":
+                print(f"✅ Echo received successfully!")
+                print(f"Server Timestamp: {data.get('sent_at')}")
+                print("WS V3 is confirmed working through the gateway.")
+            else:
+                print(f"❓ Received unexpected message type: {data.get('msg_type')}")
+                print(f"Full payload: {data}")
+
+    except Exception as e:
+        print(f"❌ Failed: {e}")
+
+if __name__ == "__main__":
+    asyncio.run(test_ping())