add unit testing for new model regex pattern matching

tests/proxy_unit_tests/test_user_api_key_auth.py

@@ -15,6 +15,10 @@
 
 import litellm
 from litellm.proxy.auth.user_api_key_auth import user_api_key_auth
+from litellm.proxy.auth.auth_checks import (
+    _model_is_within_list_of_allowed_models,
+    _model_matches_patterns,
+)
 
 
 class Request:
@@ -387,3 +391,59 @@ def test_is_api_route_allowed(route, user_role, expected_result):
             pass
         else:
             raise e
+
+
+@pytest.mark.parametrize(
+    "model, allowed_models, expected_result",
+    [
+        # Empty allowed models list
+        ("gpt-4", [], True),
+        # Universal access patterns
+        ("gpt-4", ["*"], True),
+        ("gpt-4", ["all-proxy-models"], True),
+        # Exact matches
+        ("gpt-4", ["gpt-4"], True),
+        ("gpt-4", ["gpt-3.5", "claude-2"], False),
+        # Pattern matching
+        ("azure/gpt-4", ["azure/*"], True),
+        ("custom_engine/model-123", ["custom_engine/*"], True),
+        ("custom_engine/model-123", ["custom_engine/*", "azure/*"], True),
+        ("custom-engine/model-123", ["custom_engine/*", "azure/*"], False),
+        ("gpt-4", ["gpt-*"], True),
+        ("gpt-4", ["claude-*"], False),
+        # Mixed scenarios
+        ("gpt-4", ["claude-2", "gpt-*", "palm-2"], True),
+        ("anthropic/claude-instant-1", ["anthropic/*", "gpt-4"], True),
+    ],
+)
+def test_model_is_within_list_of_allowed_models(model, allowed_models, expected_result):
+    result = _model_is_within_list_of_allowed_models(
+        model=model, allowed_models=allowed_models
+    )
+    assert result == expected_result
+
+
+@pytest.mark.parametrize(
+    "model, allowed_models, expected_result",
+    [
+        # Basic pattern matching
+        ("gpt-4", ["gpt-*"], True),
+        ("azure/gpt-4", ["azure/*"], True),
+        ("custom_engine/model-123", ["custom_engine/*"], True),
+        ("custom_engine/model-123", ["custom_engine/*", "azure/*"], True),
+        ("custom-engine/model-123", ["custom_engine/*", "azure/*"], False),
+        # Multiple patterns
+        ("gpt-4", ["claude-*", "gpt-*"], True),
+        ("anthropic/claude-instant-1", ["anthropic/*", "gpt-*"], True),
+        # No matches
+        ("gpt-4", ["claude-*"], False),
+        ("azure/gpt-4", ["anthropic/*"], False),
+        # Edge cases
+        ("gpt-4", ["gpt-4"], False),  # No wildcard, should return False
+        ("model", ["*-suffix"], False),
+        ("prefix-model", ["prefix-*"], True),
+    ],
+)
+def test_model_matches_patterns(model, allowed_models, expected_result):
+    result = _model_matches_patterns(model=model, allowed_models=allowed_models)
+    assert result == expected_result