updates docstr + fix spelling

test/agentchat/test_conversable_agent.py

@@ -1311,6 +1311,77 @@ def test_messages_with_carryover():
     assert len(generated_message["content"]) == 2
 
 
+def test_chat_history():
+    alice = autogen.ConversableAgent(
+        "alice",
+        human_input_mode="NEVER",
+        llm_config=False,
+        default_auto_reply="This is alice speaking.",
+    )
+
+    charlie = autogen.ConversableAgent(
+        "charlie",
+        human_input_mode="NEVER",
+        llm_config=False,
+        default_auto_reply="This is charlie speaking.",
+    )
+
+    max_turns = 2
+
+    def bob_initiate_chat(agent: ConversableAgent, text: Literal["past", "future"]):
+        _ = agent.initiate_chat(
+            alice,
+            message=f"This is bob from the {text} speaking.",
+            max_turns=max_turns,
+            clear_history=False,
+            silent=True,
+        )
+        _ = agent.initiate_chat(
+            charlie,
+            message=f"This is bob from the {text} speaking.",
+            max_turns=max_turns,
+            clear_history=False,
+            silent=True,
+        )
+
+    bob = autogen.ConversableAgent(
+        "bob",
+        human_input_mode="NEVER",
+        llm_config=False,
+        default_auto_reply="This is bob from the past speaking.",
+    )
+    bob_initiate_chat(bob, "past")
+    context = bob.chat_messages
+
+    del bob
+
+    # Test agent with chat history
+    bob = autogen.ConversableAgent(
+        "bob",
+        human_input_mode="NEVER",
+        llm_config=False,
+        default_auto_reply="This is bob from the future speaking.",
+        messages=context,
+    )
+
+    assert bool(bob.chat_messages)
+    assert bob.chat_messages == context
+
+    # two times the max turns due to bob replies
+    assert len(bob.chat_messages[alice]) == 2 * max_turns
+    assert len(bob.chat_messages[charlie]) == 2 * max_turns
+
+    bob_initiate_chat(bob, "future")
+    assert len(bob.chat_messages[alice]) == 4 * max_turns
+    assert len(bob.chat_messages[charlie]) == 4 * max_turns
+
+    assert bob.chat_messages[alice][0]["content"] == "This is bob from the past speaking."
+    assert bob.chat_messages[charlie][0]["content"] == "This is bob from the past speaking."
+
+    assert bob.chat_messages[alice][-2]["content"] == "This is bob from the future speaking."
+    assert bob.chat_messages[charlie][-2]["content"] == "This is bob from the future speaking."
+
+
 if __name__ == "__main__":
     # test_trigger()
     # test_context()