refactor: simplifica o adapter DeepAgents

tests/test_deep_agent_stream.py

@@ -11,7 +11,7 @@ def make_adapter(events, timeout=0.05):
     adapter = object.__new__(DeepAgentsAdapter)
     adapter._closed = False
     adapter._stream_event_timeout = timeout
-    adapter.agent = SimpleNamespace(astream=lambda *args, **kwargs: events)
+    adapter._graph = SimpleNamespace(astream=lambda *args, **kwargs: events)
     return adapter
 
 
@@ -138,9 +138,42 @@ def test_adapter_streams_real_deepagents_graph_with_fake_model():
         adapter = object.__new__(DeepAgentsAdapter)
         adapter._closed = False
         adapter._stream_event_timeout = 2.0
-        adapter.agent = create_deep_agent(
+        adapter._graph = create_deep_agent(
             model=Model(responses=["Olá Lara."]), tools=[], checkpointer=MemorySaver(),
         )
         response = await adapter.process("session", 1, "Diga olá")
         assert response == "Olá Lara."
     asyncio.run(scenario())
+
+
+def test_process_rejects_empty_text_response_and_closes_stream():
+    async def scenario():
+        closed = asyncio.Event()
+
+        async def source():
+            try:
+                yield event([{"type": "reasoning", "text": "Interno"}])
+            finally:
+                closed.set()
+
+        with pytest.raises(RuntimeError, match="empty streaming response"):
+            await make_adapter(source()).process("session", 1, "Olá")
+        assert closed.is_set()
+    asyncio.run(scenario())
+
+
+def test_process_propagates_provider_failure_and_closes_stream():
+    async def scenario():
+        closed = asyncio.Event()
+
+        async def source():
+            try:
+                yield event("Texto parcial")
+                raise ValueError("provider failure")
+            finally:
+                closed.set()
+
+        with pytest.raises(ValueError, match="provider failure"):
+            await make_adapter(source()).process("session", 1, "Olá")
+        assert closed.is_set()
+    asyncio.run(scenario())