code: def test_raises_error_on_invalid_bucket_name(invalid_buckets):
      for bucket_name in invalid_buckets:
          with pytest.raises(ValueError):
              _ = GoogleCloudStorageObserver(
                  bucket=bucket_name, basedir=BASEDIR
              )
  
imports: import pytest
  import datetime
  import os
  import json
  from sacred.observers import GoogleCloudStorageObserver
label_desc: Use image node_id 21 for calling a global function with example usage: test_raises_error_on_invalid_bucket_name(invalid_buckets) without return types