code: def test_format_timedelta(self):
      td1 = datetime.timedelta(hours=9, minutes=0, seconds=59)
      self.assertEqual("09:00:59", format_timedelta(td1))
  
      td2 = datetime.timedelta(minutes=9, seconds=7)
      self.assertEqual("00:09:07", format_timedelta(td2))
  
imports: import datetime
  import unittest
  from small_text.utils.datetime import format_timedelta
label_desc: Use image node_id 2 for calling the DatetimeUtilsTest obj's underlying member method code with example usage: obj.test_format_timedelta() without return types