code: def test_bytes_to_mb_gb(self) -> None:
      bytes_to_mb_test_cases = [
          (0, "0.0 MB"),
          (100000, "0.1 MB"),
          (1000000, "0.95 MB"),
          (1000000000, "0.93 GB"),
          (1000000000000, "931.32 GB"),
      ]
      for inp, expected in bytes_to_mb_test_cases:
          self.assertEqual(expected, _bytes_to_mb_gb(inp))
  
file_path: tnt/tests/utils/test_oom.py
imports: import os
  import tempfile
  import unittest
  import torch
  from torchtnt.utils.device import get_device_from_env
  from torchtnt.utils.oom import _bytes_to_mb_gb, is_out_of_cpu_memory, is_out_of_cuda_memory, is_out_of_memory_error, log_memory_snapshot
  from torchtnt.utils.version import is_torch_version_geq_2_0
label_desc: Use image node_id 5 for calling the OomTest obj's underlying member method code with example usage: obj.test_bytes_to_mb_gb() without return types