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

tests/test_ch9_assistant_text_null_content.py

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+import pytest
+import sys
+import os
+
+sys.path.insert(0, os.path.abspath("chapter9/trajectory-verifier"))
+
+from verifier import _assistant_text, ProcessVerifier, PASS
+
+
+def test_assistant_text_handles_null_content():
+    """Contract: _assistant_text does not output literal 'None' for assistant tool-call messages with content: None."""
+    trajectory = {
+        "messages": [
+            {"role": "assistant", "content": None, "tool_calls": [{"id": "call_1"}]}
+        ]
+    }
+    assert _assistant_text(trajectory) == ""
+
+
+def test_process_verifier_privacy_tolerates_null_content_assistant_messages():
+    """Contract: ProcessVerifier._privacy does not flag false positive privacy leak on content: None assistant messages."""
+    trajectory = {
+        "messages": [
+            {"role": "assistant", "content": None, "tool_calls": [{"id": "call_1"}]}
+        ],
+        "sensitive_values": [
+            {"label": "auth token", "value": "None"}
+        ]
+    }
+    pv = ProcessVerifier()
+    res = pv._privacy(trajectory)
+    assert res.verdict == PASS