code: def test_csv_log_async(self) -> None:
      with TemporaryDirectory() as tmpdir:
          csv_path = Path(tmpdir, "test.csv").as_posix()
          logger = CSVLogger(
              csv_path, steps_before_flushing=1, async_write=True
          )
          log_name = "asdf"
          log_value = 123.0
          log_step = 10
          logger.log(log_name, log_value, log_step)
          logger.close()
  
          with open(csv_path) as f:
              output = list(csv.DictReader(f))
              # pyre-fixme[16]: `_DictReadMapping` has no attribute `__getitem__`.
              self.assertEqual(float(output[0][log_name]), log_value)
              self.assertEqual(int(output[0]["step"]), log_step)
  
file_path: tnt/tests/utils/loggers/test_csv.py
imports: import csv
  import unittest
  from pathlib import Path
  from tempfile import TemporaryDirectory
  from torchtnt.utils.loggers.csv import CSVLogger
label_desc: Use image node_id 2 for calling the CSVLoggerTest obj's underlying member method code with example usage: obj.test_csv_log_async() without return types