class_docstr: Check that basic Spark is working
code: def test_spark(self):
      sum = self.sc.parallelize(range(1000)).sum()
      self.assertEqual(sum, 499500)
  
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 1 for calling the SimpleTest obj's underlying member method code with example usage: obj.test_spark() without return types