Fix #2755: Add support for custom knowledge storage with pre-existing embeddings

Co-Authored-By: Joe Moura <joao@crewai.com>

tests/knowledge/custom_storage_knowledge_source_test.py

@@ -0,0 +1,69 @@
+"""Test CustomStorageKnowledgeSource functionality."""
+
+import os
+from pathlib import Path
+from unittest.mock import patch
+
+import pytest
+
+from crewai.knowledge.knowledge import Knowledge
+from crewai.knowledge.source.custom_storage_knowledge_source import CustomStorageKnowledgeSource
+from crewai.knowledge.storage.knowledge_storage import KnowledgeStorage
+
+
+@pytest.fixture
+def custom_storage():
+    """Create a custom KnowledgeStorage instance."""
+    storage = KnowledgeStorage(collection_name="test_collection")
+    return storage
+
+
+def test_custom_storage_knowledge_source(custom_storage):
+    """Test that a CustomStorageKnowledgeSource can be created with a pre-existing storage."""
+    source = CustomStorageKnowledgeSource(collection_name="test_collection")
+    
+    assert source is not None
+    assert source.collection_name == "test_collection"
+
+
+def test_custom_storage_knowledge_source_with_knowledge(custom_storage):
+    """Test that a CustomStorageKnowledgeSource can be used with Knowledge."""
+    source = CustomStorageKnowledgeSource(collection_name="test_collection")
+    
+    with patch.object(KnowledgeStorage, 'initialize_knowledge_storage'):
+        with patch.object(CustomStorageKnowledgeSource, 'add'):
+            knowledge = Knowledge(
+                sources=[source],
+                storage=custom_storage,
+                collection_name="test_collection"
+            )
+    
+    assert knowledge is not None
+    assert knowledge.sources[0] == source
+    assert knowledge.storage == custom_storage
+
+
+def test_custom_storage_knowledge_source_with_crew():
+    """Test that a CustomStorageKnowledgeSource can be used with Crew."""
+    from crewai.agent import Agent
+    from crewai.crew import Crew
+    from crewai.task import Task
+    
+    storage = KnowledgeStorage(collection_name="test_collection")
+    
+    source = CustomStorageKnowledgeSource(collection_name="test_collection")
+    source.storage = storage
+    
+    agent = Agent(role="test", goal="test", backstory="test")
+    task = Task(description="test", expected_output="test", agent=agent)
+    
+    with patch.object(KnowledgeStorage, 'initialize_knowledge_storage'):
+        with patch.object(CustomStorageKnowledgeSource, 'add'):
+            crew = Crew(
+                agents=[agent],
+                tasks=[task],
+                knowledge_sources=[source]
+            )
+    
+    assert crew is not None
+    assert crew.knowledge_sources[0] == source