code: def testRange(self):
      stat = stopwatch.Stat()
      stat.add(1)
      stat.add(5)
      stat.add(3)
      self.assertEqual(stat.num, 3)
      self.assertEqual(stat.sum, 9)
      self.assertEqual(stat.min, 1)
      self.assertEqual(stat.max, 5)
      self.assertEqual(stat.avg, 3)
  
file_path: pysc2/pysc2/lib/stopwatch_test.py
imports: import os
  from absl.testing import absltest
  import mock
  from pysc2.lib import stopwatch
label_desc: Use image node_id 1 for calling the StatTest obj's underlying member method code with example usage: obj.testRange() without return types