class_docstr: A test result class that can print formatted text results to a stream.
  
  Used by TextTestRunner.
code: def addSuccess(self, test):
      unittest.TestResult.addSuccess(self, test)
      if self.showAll:
          self.stream.writeln("ok")
      elif self.dots:
          self.stream.write(".")
  
imports: import unittest
  import doctest
  import sys
  import time
  import timeside.core
label_desc: Use image node_id 4 for calling the _TextTestResult obj's underlying member method code with example usage: obj.addSuccess(test) without return types