[Minor] check if library path is specified

src/client.py

@@ -13,12 +13,16 @@ def get_llama_stack_client(
     llama_stack_config: LLamaStackConfiguration,
 ) -> LlamaStackClient:
     if llama_stack_config.use_as_library_client is True:
-        logger.info("Using Llama stack as library client")
-        client = LlamaStackAsLibraryClient(
-            llama_stack_config.library_client_config_path
-        )
-        client.initialize()
-        return client
+        if llama_stack_config.library_client_config_path is not None:
+            logger.info("Using Llama stack as library client")
+            client = LlamaStackAsLibraryClient(
+                llama_stack_config.library_client_config_path
+            )
+            client.initialize()
+            return client
+        msg = "Configuration problem: library_client_config_path option is not set"
+        logger.error(msg)
+        raise Exception(msg)
     else:
         logger.info("Using Llama stack running as a service")
         return LlamaStackClient(

tests/unit/test_client.py

@@ -1,6 +1,7 @@
 """Unit tests for functions defined in src/client.py."""
 
 import os
+import pytest
 from unittest.mock import patch
 
 from client import get_llama_stack_client
@@ -29,3 +30,19 @@ def test_get_llama_stack_remote_client():
     )
     client = get_llama_stack_client(cfg)
     assert client is not None
+
+
+@patch.dict(os.environ, {"INFERENCE_MODEL": "llama3.2:3b-instruct-fp16"})
+def test_get_llama_stack_wrong_configuration():
+    cfg = LLamaStackConfiguration(
+        url=None,
+        api_key=None,
+        use_as_library_client=True,
+        library_client_config_path="ollama",
+    )
+    cfg.library_client_config_path = None
+    with pytest.raises(
+        Exception,
+        match="Configuration problem: library_client_config_path option is not set",
+    ):
+        get_llama_stack_client(cfg)