Fix proxy pytests (#2272)

tests/test_proxy.py

@@ -9,7 +9,9 @@ from mem0.proxy.main import Chat, Completions, Mem0
 
 @pytest.fixture
 def mock_memory_client():
-    return Mock(spec=MemoryClient)
+    mock_client = Mock(spec=MemoryClient)
+    mock_client.user_email = None
+    return mock_client
 
 
 @pytest.fixture
@@ -65,6 +67,7 @@ def test_completions_create(mock_memory_client, mock_litellm):
     messages = [{"role": "user", "content": "Hello, how are you?"}]
     mock_memory_client.search.return_value = [{"memory": "Some relevant memory"}]
     mock_litellm.completion.return_value = {"choices": [{"message": {"content": "I'm doing well, thank you!"}}]}
+    mock_litellm.supports_function_calling.return_value = True
 
     response = completions.create(model="gpt-4o-mini", messages=messages, user_id="test_user", temperature=0.7)
 
@@ -89,6 +92,7 @@ def test_completions_create_with_system_message(mock_memory_client, mock_litellm
     ]
     mock_memory_client.search.return_value = [{"memory": "Some relevant memory"}]
     mock_litellm.completion.return_value = {"choices": [{"message": {"content": "I'm doing well, thank you!"}}]}
+    mock_litellm.supports_function_calling.return_value = True
 
     completions.create(model="gpt-4o-mini", messages=messages, user_id="test_user")