code: def setUpClass(cls):
      cls.evadb = get_evadb_for_testing()
      cls.evadb.catalog().reset()
  
      # Get sample image.
      cls.img_path = create_sample_image()
  
      # Load functions.
      load_functions_for_testing(cls.evadb, mode="debug")
  
      # Create database.
      params = {
          "user": "eva",
          "password": "password",
          "host": "localhost",
          "port": "5432",
          "database": "evadb",
      }
      query = f"""CREATE DATABASE test_data_source
                      WITH ENGINE = "postgres",
                      PARAMETERS = {params};"""
      execute_query_fetch_all(cls.evadb, query)
  
file_path: evadb/test/third_party_tests/test_native_similarity_index.py
imports: import unittest
  from test.util import create_sample_image, get_evadb_for_testing, load_functions_for_testing
  import pytest
  from evadb.server.command_handler import execute_query_fetch_all
label_desc: Use image node_id 1 for calling the CreateIndexTest obj's underlying member method code with example usage: obj.setUpClass(cls) without return types