code: def test_saved_content(self):
      with tempfile.TemporaryDirectory() as tempdir:
          # set up engine
          def _train_func(engine, batch):
              engine.state.batch = decollate_batch(batch)
              return [torch.zeros(1) for _ in range(8)]
  
          engine = Engine(_train_func)
  
          # set up testing handler
          saver = CSVSaver(
              output_dir=tempdir,
              filename="predictions2.csv",
              delimiter="\t",
          )
          ClassificationSaver(
              output_dir=tempdir,
              filename="predictions1.csv",
              delimiter="\t",
          ).attach(engine)
          ClassificationSaver(saver=saver).attach(engine)
  
          data = [
              {
                  "filename_or_obj": [
                      "testfile" + str(i) for i in range(8)
                  ]
              }
          ]
          engine.run(data, max_epochs=1)
  
          def _test_file(filename):
              filepath = os.path.join(tempdir, filename)
              self.assertTrue(os.path.exists(filepath))
              with open(filepath) as f:
                  reader = csv.reader(f, delimiter="\t")
                  i = 0
                  for row in reader:
                      self.assertEqual(row[0], "testfile" + str(i))
                      self.assertEqual(
                          np.array(row[1:]).astype(np.float32), 0.0
                      )
                      i += 1
                  self.assertEqual(i, 8)
  
          _test_file("predictions1.csv")
          _test_file("predictions2.csv")
  
file_path: MONAI/tests/test_handler_classification_saver.py
imports: from __future__ import annotations
  import csv
  import os
  import tempfile
  import unittest
  import numpy
  import torch
  from ignite.engine import Engine
  from monai.data import decollate_batch
  from monai.data.csv_saver import CSVSaver
  from monai.handlers import ClassificationSaver
label_desc: Use image node_id 1 for calling the TestHandlerClassificationSaver obj's underlying member method code with example usage: obj.test_saved_content() and returns: unknown