docstr: setup any state tied to the execution of the given method in a
  class.  setup_method is invoked for every test method of a class.
code: def setUp(self):
      """setup any state tied to the execution of the given method in a
      class.  setup_method is invoked for every test method of a class.
      """
      self.sc = init_orca_context(cores=4)
  
file_path: BigDL/python/orca/test/bigdl/orca/test_import.py
imports: from unittest import TestCase
  import pytest
  from bigdl.orca import init_orca_context, stop_orca_context
label_desc: Use image node_id 1 for calling the TestImport obj's underlying member method code with example usage: obj.setUp() without return types