code: def validate(path):
      """
      Validates a test directory path by checking if any actual images exist
      and creating the mirror baseline directory if required. Returns bool to
      show if work should be done on the path or raises an exception if invalid.
      """
      actual_path = os.path.join(ACTUAL, path)
      if not os.path.exists(actual_path):
          return False
  
      if not os.path.isdir(actual_path):
          raise ValueError("{} is not a directory".format(actual_path))
  
      baseline_path = os.path.join(BASELINE, path)
      if not os.path.exists(baseline_path):
          os.makedirs(baseline_path)
  
      return True
  
file_path: yellowbrick/tests/images.py
imports: import os
  import glob
  import shutil
  import argparse
label_desc: Use image node_id 2 for calling a global function with example usage: validate(path) and returns: True, False