code: def setUp(self):
      self.evadb = get_evadb_for_testing()
      self.evadb.catalog().reset()
      self.video_file_path = create_sample_video(NUM_FRAMES)
  
file_path: evadb/test/unit_tests/optimizer/test_cascade_optimizer.py
imports: import unittest
  from test.util import NUM_FRAMES, create_sample_video, file_remove, get_evadb_for_testing, shutdown_ray
  import pandas
  import pytest
  from evadb.models.storage.batch import Batch
  from evadb.server.command_handler import execute_query_fetch_all
label_desc: Use image node_id 1 for calling the CascadeOptimizer obj's underlying member method code with example usage: obj.setUp() without return types