""" Integration tests for router embedding method with various configurations. These tests simulate real-world scenarios where headers and configuration need to be properly propagated through the router to the LLM API. """ import os import sys from unittest.mock import MagicMock, patch, AsyncMock import pytest sys.path.insert(0, os.path.abspath("../..")) from litellm import Router class TestRouterEmbeddingIntegration: """Integration tests for embedding with router configuration.""" def test_embedding_with_deployment_specific_headers(self): """ Test that deployment-specific headers are propagated. This simulates a scenario where different deployments have different header requirements (e.g., different API versions). """ model_list = [ { "model_name": "embedding-deployment-1", "litellm_params": { "model": "text-embedding-ada-002", "api_key": "key-1", "headers": {"X-Deployment": "deployment-1"}, }, }, { "model_name": "embedding-deployment-2", "litellm_params": { "model": "text-embedding-ada-002", "api_key": "key-2", "headers": {"X-Deployment": "deployment-2"}, }, }, ] router = Router(model_list=model_list) # Test first deployment with patch("litellm.embedding") as mock_embedding: mock_embedding.return_value = MagicMock(data=[{"embedding": [0.1, 0.2]}]) router.embedding(model="embedding-deployment-1", input=["test"]) call_kwargs = mock_embedding.call_args[1] assert call_kwargs["api_key"] == "key-1" # Test second deployment with patch("litellm.embedding") as mock_embedding: mock_embedding.return_value = MagicMock(data=[{"embedding": [0.1, 0.2]}]) router.embedding(model="embedding-deployment-2", input=["test"]) call_kwargs = mock_embedding.call_args[1] assert call_kwargs["api_key"] == "key-2" def test_embedding_with_router_and_deployment_headers_merge(self): """ Test that router-level headers are propagated. When no request headers are provided, router default headers should be used. """ model_list = [ { "model_name": "test-embedding", "litellm_params": { "model": "text-embedding-ada-002", "api_key": "test-key", }, } ] router = Router( model_list=model_list, default_litellm_params={ "headers": { "X-Router-Header": "router-value", "X-Common-Header": "router-common", } }, ) # Test: No request headers - router headers should be used with patch("litellm.embedding") as mock_embedding: mock_embedding.return_value = MagicMock(data=[{"embedding": [0.1, 0.2]}]) router.embedding( model="test-embedding", input=["test"], ) call_kwargs = mock_embedding.call_args[1] # Router headers should be present assert "headers" in call_kwargs assert call_kwargs["headers"]["X-Router-Header"] == "router-value" assert call_kwargs["headers"]["X-Common-Header"] == "router-common" def test_embedding_metadata_propagation(self): """ Test that metadata is properly set up and propagated. This is important for logging, tracking, and debugging. """ model_list = [ { "model_name": "test-embedding", "litellm_params": { "model": "text-embedding-ada-002", "api_key": "test-key", }, } ] router = Router( model_list=model_list, default_litellm_params={ "metadata": {"environment": "test", "service": "embedding-service"} }, ) with patch("litellm.embedding") as mock_embedding: mock_embedding.return_value = MagicMock(data=[{"embedding": [0.1, 0.2]}]) router.embedding( model="test-embedding", input=["test"], metadata={"request_id": "req-123"}, # Additional metadata from request ) call_kwargs = mock_embedding.call_args[1] # Check metadata contains all expected fields assert "metadata" in call_kwargs metadata = call_kwargs["metadata"] # From _update_kwargs_before_fallbacks assert "model_group" in metadata assert metadata["model_group"] == "test-embedding" # From default_litellm_params assert "environment" in metadata assert metadata["environment"] == "test" assert "service" in metadata assert metadata["service"] == "embedding-service" # From request assert "request_id" in metadata assert metadata["request_id"] == "req-123" @pytest.mark.asyncio async def test_async_embedding_with_multiple_retries(self): """ Test that async embedding properly uses num_retries from router config. This ensures the fix works with the retry mechanism. """ model_list = [ { "model_name": "test-embedding", "litellm_params": { "model": "text-embedding-ada-002", "api_key": "test-key", }, } ] router = Router(model_list=model_list, num_retries=2) with patch("litellm.aembedding", new_callable=AsyncMock) as mock_aembedding: mock_aembedding.return_value = MagicMock(data=[{"embedding": [0.1, 0.2]}]) await router.aembedding(model="test-embedding", input=["test"]) # The call should succeed mock_aembedding.assert_called_once() def test_embedding_with_timeout_from_router(self): """ Test that timeout settings from router config are propagated. """ model_list = [ { "model_name": "test-embedding", "litellm_params": { "model": "text-embedding-ada-002", "api_key": "test-key", }, } ] router = Router(model_list=model_list, timeout=30.0) with patch("litellm.embedding") as mock_embedding: mock_embedding.return_value = MagicMock(data=[{"embedding": [0.1, 0.2]}]) router.embedding(model="test-embedding", input=["test"]) call_kwargs = mock_embedding.call_args[1] # Timeout should be set from router config assert "timeout" in call_kwargs assert call_kwargs["timeout"] == 30.0 def test_embedding_with_multiple_deployments_load_balancing(self): """ Test that headers are correctly propagated when router load balances between multiple deployments. """ model_list = [ { "model_name": "shared-embedding-model", "litellm_params": { "model": "text-embedding-ada-002", "api_key": "key-1", }, }, { "model_name": "shared-embedding-model", "litellm_params": { "model": "text-embedding-ada-002", "api_key": "key-2", }, }, ] router = Router( model_list=model_list, default_litellm_params={"headers": {"X-Shared-Header": "shared-value"}}, ) # Make multiple calls and verify headers are always present for i in range(5): with patch("litellm.embedding") as mock_embedding: mock_embedding.return_value = MagicMock( data=[{"embedding": [0.1, 0.2]}] ) router.embedding(model="shared-embedding-model", input=[f"test {i}"]) call_kwargs = mock_embedding.call_args[1] # Headers should always be present regardless of which deployment is chosen assert "headers" in call_kwargs assert call_kwargs["headers"]["X-Shared-Header"] == "shared-value" @pytest.mark.asyncio async def test_embedding_with_fallback_configuration(self): """ Test that headers are propagated correctly when using fallback models. """ model_list = [ { "model_name": "primary-embedding", "litellm_params": { "model": "text-embedding-ada-002", "api_key": "primary-key", }, }, { "model_name": "fallback-embedding", "litellm_params": { "model": "text-embedding-ada-002", "api_key": "fallback-key", }, }, ] router = Router( model_list=model_list, fallbacks=[{"primary-embedding": ["fallback-embedding"]}], default_litellm_params={"headers": {"X-Fallback-Test": "test-value"}}, ) # Simulate primary failing, fallback succeeding with patch("litellm.aembedding", new_callable=AsyncMock) as mock_aembedding: call_count = 0 async def side_effect(*args, **kwargs): nonlocal call_count call_count += 1 if call_count == 1: # First call (primary) fails raise Exception("Primary failed") else: # Second call (fallback) succeeds return MagicMock(data=[{"embedding": [0.1, 0.2]}]) mock_aembedding.side_effect = side_effect await router.aembedding(model="primary-embedding", input=["test"]) # Both calls should have headers assert mock_aembedding.call_count == 2 # Check that both calls had headers for call_obj in mock_aembedding.call_args_list: call_kwargs = call_obj[1] assert "headers" in call_kwargs assert call_kwargs["headers"]["X-Fallback-Test"] == "test-value" def test_embedding_with_custom_provider_headers(self): """ Test that provider-specific headers are correctly propagated. Some providers require specific headers for API versioning, features, etc. """ model_list = [ { "model_name": "azure-embedding", "litellm_params": { "model": "azure/text-embedding-ada-002", "api_key": "azure-key", "api_base": "https://example.openai.azure.com", "api_version": "2024-02-01", }, } ] router = Router( model_list=model_list, default_litellm_params={ "headers": {"X-Custom-Azure-Header": "azure-value"} }, ) with patch("litellm.embedding") as mock_embedding: mock_embedding.return_value = MagicMock(data=[{"embedding": [0.1, 0.2]}]) router.embedding(model="azure-embedding", input=["test"]) call_kwargs = mock_embedding.call_args[1] # Verify Azure-specific params are present assert call_kwargs["api_base"] == "https://example.openai.azure.com" assert call_kwargs["api_version"] == "2024-02-01" # Verify custom headers are present assert "headers" in call_kwargs assert call_kwargs["headers"]["X-Custom-Azure-Header"] == "azure-value" if __name__ == "__main__": # Run tests pytest.main([__file__, "-v"])