FIX multiLLM bug

tests/metagpt/actions/test_action_multi_llm.py

@@ -0,0 +1,53 @@
+import pytest
+
+
+from metagpt.config2 import Config
+from metagpt.roles.role import Role, RoleReactMode
+from metagpt.actions.action import Action
+from metagpt.context import Context
+from metagpt.provider.llm_provider_registry import create_llm_instance
+from metagpt.const import TEST_DATA_PATH
+
+def test_set_llm():
+    config1 = Config.default()
+    config2 = Config.default()
+    config2.llm.model = "gpt-3.5-turbo"
+
+    context = Context(config=config1)
+    act = Action(context=context)
+    assert act.config.llm.model == config1.llm.model
+
+    llm2 = create_llm_instance(config2.llm)
+    act.llm = llm2
+    assert act.llm.model == llm2.model
+
+    role = Role(context=context)
+    role.set_actions([act])
+    assert act.llm.model == llm2.model
+
+    role1 = Role(context=context)
+    act1 = Action(context=context)
+    assert act1.config.llm.model == config1.llm.model
+    act1.config = config2
+    role1.set_actions([act1])
+    assert act1.llm.model == llm2.model
+    
+    # multiple LLM
+
+    config3_path = TEST_DATA_PATH / "config/config2_multi_llm.yaml"
+    dict3 = Config.read_yaml(config3_path)
+    config3 = Config(**dict3)
+    context3 = Context(config=config3)
+    role3 = Role(context=context3)
+    act3 = Action(context=context3, llm_name_or_type="YOUR_MODEL_NAME_1")
+    assert act3.config.llm.model == "gpt-3.5-turbo"
+    assert act3.llm.model == "gpt-4-turbo"
+    role3.set_actions([act3])
+    assert act3.config.llm.model == "gpt-3.5-turbo"
+    assert act3.llm.model == "gpt-4-turbo"
+    
+    
+
+
+
+