fix: support nested config format for embedder configuration

- support nested config format with embedderconfig typeddict  
- fix parsing for model/model_name compatibility  
- add validation, typing_extensions, and improved type hints  
- enhance embedding factory with env var injection and provider support  
- add tests for openai, azure, and all embedding providers  
- misc fixes: test file rename, updated mocking patterns

tests/rag/embeddings/test_factory_azure.py

@@ -0,0 +1,79 @@
+"""Test Azure embedder configuration with factory."""
+
+from unittest.mock import MagicMock, patch
+
+import pytest
+
+from crewai.rag.embeddings.factory import EmbedderConfig, get_embedding_function
+
+
+class TestAzureEmbedderFactory:
+    """Test Azure embedder configuration with factory function."""
+
+    @patch("crewai.rag.embeddings.factory.EMBEDDING_PROVIDERS")
+    def test_azure_with_nested_config(self, mock_providers):
+        """Test Azure configuration with nested config key."""
+
+        mock_embedding = MagicMock()
+        mock_openai_func = MagicMock(return_value=mock_embedding)
+        mock_providers.__getitem__.return_value = mock_openai_func
+        mock_providers.__contains__.return_value = True
+
+        embedder_config = EmbedderConfig(
+            provider="openai",
+            config={
+                "api_key": "test-azure-key",
+                "api_base": "https://test.openai.azure.com/",
+                "api_type": "azure",
+                "api_version": "2023-05-15",
+                "model": "text-embedding-3-small",
+                "deployment_id": "test-deployment",
+            },
+        )
+
+        result = get_embedding_function(embedder_config)
+
+        mock_openai_func.assert_called_once_with(
+            api_key="test-azure-key",
+            api_base="https://test.openai.azure.com/",
+            api_type="azure",
+            api_version="2023-05-15",
+            model_name="text-embedding-3-small",
+            deployment_id="test-deployment",
+        )
+        assert result == mock_embedding
+
+    @patch("crewai.rag.embeddings.factory.EMBEDDING_PROVIDERS")
+    def test_regular_openai_with_nested_config(self, mock_providers):
+        """Test regular OpenAI configuration with nested config."""
+
+        mock_embedding = MagicMock()
+        mock_openai_func = MagicMock(return_value=mock_embedding)
+        mock_providers.__getitem__.return_value = mock_openai_func
+        mock_providers.__contains__.return_value = True
+
+        embedder_config = EmbedderConfig(
+            provider="openai",
+            config={"api_key": "test-openai-key", "model": "text-embedding-3-large"},
+        )
+
+        result = get_embedding_function(embedder_config)
+
+        mock_openai_func.assert_called_once_with(
+            api_key="test-openai-key", model_name="text-embedding-3-large"
+        )
+        assert result == mock_embedding
+
+    def test_flat_format_raises_error(self):
+        """Test that flat format raises an error."""
+        embedder_config = {
+            "provider": "openai",
+            "api_key": "test-key",
+            "model_name": "text-embedding-3-small",
+        }
+
+        with pytest.raises(ValueError) as exc_info:
+            get_embedding_function(embedder_config)
+
+        assert "Invalid embedder configuration format" in str(exc_info.value)
+        assert "nested under a 'config' key" in str(exc_info.value)