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

chapter3/user-memory/test_recent_turns_limit_zero.py

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+"""get_recent_turns(limit=0) must return [], not the full history."""
+import os
+import sys
+
+sys.path.insert(0, os.path.dirname(os.path.abspath(__file__)))
+
+from config import Config
+from conversation_history import ConversationHistory, ConversationTurn
+
+
+def test_limit_zero_returns_empty(tmp_path, monkeypatch):
+    monkeypatch.setattr(Config, "CONVERSATION_HISTORY_DIR", str(tmp_path))
+    monkeypatch.setattr(Config, "ENABLE_HISTORY_SEARCH", False)
+    hist = ConversationHistory("u1")
+    hist.conversations = [
+        ConversationTurn("s", "u0", "a0", "t0", 1),
+        ConversationTurn("s", "u1", "a1", "t1", 2),
+        ConversationTurn("s", "u2", "a2", "t2", 3),
+    ]
+    assert hist.get_recent_turns(0) == []
+
+
+def test_positive_limit_still_returns_recent(tmp_path, monkeypatch):
+    monkeypatch.setattr(Config, "CONVERSATION_HISTORY_DIR", str(tmp_path))
+    monkeypatch.setattr(Config, "ENABLE_HISTORY_SEARCH", False)
+    hist = ConversationHistory("u1")
+    t1 = ConversationTurn("s", "u1", "a1", "t1", 1)
+    t2 = ConversationTurn("s", "u2", "a2", "t2", 2)
+    t3 = ConversationTurn("s", "u3", "a3", "t3", 3)
+    hist.conversations = [t1, t2, t3]
+    assert hist.get_recent_turns(2) == [t2, t3]