test: Use custom embedder for cleanup test

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

tests/memory/test_memory_reset.py

@@ -65,8 +65,16 @@ def test_memory_reset_with_missing_api_key(temp_db_dir):
 
 def test_memory_reset_cleans_up_files(temp_db_dir):
     """Test that memory reset properly cleans up database files."""
-    os.environ["OPENAI_API_KEY"] = "test-key"
-    memory = ShortTermMemory(path=str(temp_db_dir))
+    class TestEmbedder(EmbeddingFunction):
+        def __call__(self, input: Documents) -> Embeddings:
+            if isinstance(input, str):
+                input = [input]
+            return [[0.5] * 10] * len(input)
+            
+    memory = ShortTermMemory(
+        path=str(temp_db_dir),
+        embedder_config={"provider": TestEmbedder()}
+    )
     memory.save("test memory", {"test": "metadata"})
     assert any(temp_db_dir.iterdir())  # Directory should have files
     memory.reset()