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

chapter4/perception-tools/test_wiki_article_history_date.py

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+import asyncio
+import json
+import os
+import sys
+import types
+
+sys.path.insert(0, os.path.join(os.path.dirname(__file__), "src"))
+
+# Optional runtime deps for importing the chapter module in unit tests.
+sys.modules.setdefault("wikipedia", types.ModuleType("wikipedia"))
+sys.modules.setdefault("dotenv", types.SimpleNamespace(load_dotenv=lambda: None))
+mcp = types.ModuleType("mcp")
+mcp_types = types.ModuleType("mcp.types")
+
+class TextContent:
+    def __init__(self, **kwargs):
+        self.__dict__.update(kwargs)
+
+mcp_types.TextContent = TextContent
+sys.modules["mcp"] = mcp
+sys.modules["mcp.types"] = mcp_types
+
+from wiki_enhanced import get_article_history
+
+
+def test_year_only_date_returns_error_payload():
+    result = asyncio.run(get_article_history("Python", "2025"))
+    payload = json.loads(result.text)
+    assert payload["success"] is False
+    msg = str(payload["message"])
+    assert "date must be" in msg or "Failed" in msg