code: def test_one_node_data_size(self, histogram_indexer):
      # Test if the one node data size is correctly calculated
      assert histogram_indexer.one_node_data_size() == sum(
          histogram_indexer.feature_bin_sizes
      )
  
file_path: FATE/python/fate/test/histogram/indexer.py
imports: import pytest
  from fate_utils.histogram import HistogramIndexer, Shuffler
label_desc: Use image node_id 8 for calling the TestHistogramIndexer obj's underlying member method code with example usage: obj.test_one_node_data_size(histogram_indexer) without return types