[tests] Add API test suite

tests-api/test_model_api.py

@@ -0,0 +1,62 @@
+"""
+Tests for model management endpoints.
+These features are scheduled for deprecation, so tests are minimal.
+"""
+import pytest
+from typing import Callable, Dict
+
+from utils.validation import validate_response
+
+
+@pytest.mark.parametrize(
+    "mode", 
+    ["local", "remote"]
+)
+def test_get_external_model_list(
+    api_request: Callable,
+    openapi_spec: Dict,
+    mode: str
+):
+    """
+    Test the endpoint for listing external models.
+    """
+    # Make the API request
+    path = "/externalmodel/getlist"
+    response, json_data = api_request(
+        method="get",
+        path=path,
+        params={"mode": mode},
+        expected_status=200,
+    )
+    
+    # Validate response structure against the schema
+    assert json_data is not None
+    validate_response(
+        response_data=json_data,
+        path=path,
+        method="get",
+        spec=openapi_spec,
+    )
+    
+    # Verify the response contains the expected fields
+    assert "models" in json_data
+    assert isinstance(json_data["models"], list)
+    
+    # If there are any models, verify they have the expected structure
+    if json_data["models"]:
+        first_model = json_data["models"][0]
+        assert "name" in first_model
+        assert "type" in first_model
+        assert "url" in first_model
+        assert "filename" in first_model
+        assert "installed" in first_model
+
+
+@pytest.mark.skip(reason="State-modifying operation that requires auth")
+def test_install_model():
+    """
+    Test queuing a model installation.
+    Skipped to avoid modifying state and requires authentication.
+    This feature is also scheduled for deprecation.
+    """
+    pass