text: import os
  
  TEST_DATA_DIR = os.path.join(os.path.dirname(__file__), 'data')
  TEST_RESULTS_DIR = os.path.join(os.path.dirname(__file__), 'results')
  
  IMG_NAME = 'floor plan.png'
  IMG_PATH = os.path.join(TEST_DATA_DIR, IMG_NAME)
  
  IMG_NAME_JPEG = 'elevation.jpg'
  IMG_PATH_JPEG = os.path.join(TEST_DATA_DIR, IMG_NAME_JPEG)
  
  WTR_NAME = 'watermark.png'
  WTR_PATH = os.path.join(TEST_DATA_DIR, WTR_NAME)
  
  
  def init_result_dir(sub_folder):
      """
      Initialize test result file destination directory.
  
      If the directory exists, delete the files it contains.
      Else, create the directory.
      """
      # Confirm 'results' folder exists
      if not os.path.isdir(TEST_RESULTS_DIR):
          os.mkdir(TEST_RESULTS_DIR)
  
      # Confirm the sub-folder exists and remove its contents, otherwise make the folder
      folder = os.path.join(TEST_RESULTS_DIR, sub_folder)
      if os.path.isdir(folder):
          for f in os.listdir(folder):
              os.remove(os.path.join(folder, f))
      else:
          os.mkdir(folder)
      return folder
  
  
  __all__ = [
      'IMG_PATH', 'WTR_PATH', 'TEST_DATA_DIR', 'TEST_RESULTS_DIR', 'IMG_NAME_JPEG', 'IMG_PATH_JPEG', 'init_result_dir'
  ]
  