code: def test_hadoop_copy_log(self):
      with with_local_temp_file("log") as r:
          hl.copy_log(r)
          stats = hl.hadoop_stat(r)
          self.assertTrue(stats["size_bytes"] > 0)
  
imports: import json
  import unittest
  import hail
  from hail.utils import *
  from hail.utils.misc import escape_str, escape_id
  from hail.utils.java import FatalError
  from hail.utils.linkedlist import LinkedList
  from ..helpers import *
label_desc: Use image node_id 5 for calling the Tests obj's underlying member method code with example usage: obj.test_hadoop_copy_log() without return types