code: def test_init(self):
      component = PyPDFToDocument()
      assert component.converter_name == "default"
      assert hasattr(component, "_converter")
  
file_path: haystack/test/components/converters/test_pypdf_to_document.py
imports: import logging
  from unittest.mock import patch
  import pytest
  from haystack import Document
  from haystack.components.converters.pypdf import PyPDFToDocument, CONVERTERS_REGISTRY
  from haystack.dataclasses import ByteStream
label_desc: Use image node_id 1 for calling the TestPyPDFToDocument obj's underlying member method code with example usage: obj.test_init() without return types