class_docstr: Test InMemoryDocumentStore's specific features
class_docstr_tok: ["Test","InMemoryDocumentStore","'s","specific","features"]
code: def document_store(self) -> InMemoryDocumentStore:
      return InMemoryDocumentStore(bm25_algorithm="BM25L")
  
imports: import logging
  from unittest.mock import patch
  import pandas
  import pytest
  from haystack import Document
  from haystack.document_stores.errors import DocumentStoreError, DuplicateDocumentError
  from haystack.document_stores.in_memory import InMemoryDocumentStore
  from haystack.testing.document_store import DocumentStoreBaseTests
label_desc: Use image node_id 1 for calling the TestMemoryDocumentStore obj's underlying member method code with example usage: obj.document_store() and returns: InMemoryDocumentStore