class_docstr: A test runner class that displays results in textual form.
  
  It prints out the names of tests as they are run, errors as they
  occur, and a summary of the results at the end of the test run.
code: def __init__(self, stream=sys.stderr, descriptions=1, verbosity=2):
      self.stream = _WritelnDecorator(stream)
      self.descriptions = descriptions
      self.verbosity = verbosity
  
imports: import unittest
  import doctest
  import sys
  import time
  import timeside.core
label_desc: Use image node_id 1 to create a new TestRunner object  with example: obj = TestRunner(stream, descriptions, verbosity)