ai-agent-book 精选快照（<2MB 代码与文档，来自 github.com/bojieli/ai-agent-book）

chapter9/trajectory-verifier/test_derive_claims_promises_null_result.py

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+import unittest
+
+from customer_service_env import _derive_claims_and_promises
+
+
+class TestDeriveClaimsPromisesNullResult(unittest.TestCase):
+    def test_derive_claims_and_promises_tolerates_non_dict_result(self):
+        """Contract: _derive_claims_and_promises handles tool calls with None or non-dict result fields.
+
+        Locks out AttributeError when tool_calls entries contain None, primitive, or missing result values.
+        """
+        messages = [{"role": "assistant", "content": "Your refund is completed", "turn": 2}]
+        tool_calls = [
+            {"name": "refund_order", "turn": 1, "result": None},
+            {"name": "refund_order", "turn": 1, "result": "error: timeout"},
+        ]
+        claims, promises = _derive_claims_and_promises(messages, tool_calls)
+        self.assertEqual(1, len(claims))
+        self.assertEqual("", claims[0]["supported_by"])
+        self.assertEqual(1, len(promises))
+
+
+if __name__ == "__main__":
+    unittest.main()