class_docstr: Base class for unittests using Spark.  Sets up and tears down a cluster per test class
code: def setUp(self):
      print(
          "\n==========================================================="
      )
      print(self.id())
      print(
          "===========================================================\n"
      )
  
file_path: TensorFlowOnSpark/tests/test.py
imports: import os
  import unittest
  from pyspark import SparkConf, SparkContext
  from pyspark.sql import SparkSession
label_desc: Use image node_id 3 for calling the SparkTest obj's underlying member method code with example usage: obj.setUp() without return types