code: def test_bktreenode_correct_initialization():
      node_name, node_value, parent_name = "test_node", "1aef", None
      node = BkTreeNode(node_name, node_value, parent_name)
      assert node.node_name == "test_node"
      assert node.node_value == "1aef"
      assert node.parent_name is None
      assert len(node.children) == 0
  
file_path: imagededup/tests/test_bktree.py
imports: from collections import OrderedDict
  from imagededup.methods.hashing import Hashing
  from imagededup.handlers.search.bktree import BKTree, BkTreeNode
label_desc: Use image node_id 2 for calling a global function with example usage: test_bktreenode_correct_initialization() without return types