test(llm): 200 非 JSON 体→LLMError 补测试钉——T9 偏差4(实现已在 4725593,旧码 JSONDecodeError 靠路由层 except ValueError 兜底,新语义显式 502)就此闭 (审计 #91⑥) [vps] [no-doc]

tests/api/test_llm_client.py

@@ -44,6 +44,18 @@ class TestHappyPath:
         assert out == {"a": 1}
         assert calls[0].headers["authorization"] == "Bearer sk-test"
 
+    def test_200_non_json_body_raises_llm_error(self):
+        """#91⑥(T9 偏差4 补钉): 200 但体非 JSON → LLMError(显式 502 语义),
+        不再是 JSONDecodeError 裸抛靠路由层 except ValueError 兜底."""
+        def h(request):
+            calls.append(request)
+            return httpx.Response(200, text="not json at all",
+                                  headers={"Content-Type": "text/plain"})
+        client, calls, _ = _make(h)
+        from sanguo_api.llm import LLMError
+        with pytest.raises(LLMError):
+            asyncio.run(client.chat_json(MSGS))
+
 
 class TestRetry:
     def test_429_honors_retry_after_seconds(self):