docstr: Test getting bucket and object from URI.
          
docstr_tok: ["Test","getting","bucket","and","object","from","URI","."]
code: def test_bucket_and_object_from_uri(self):
      """Test getting bucket and object from URI."""
      # Positive examples
      assert bucket_and_object_from_uri("ais://bucket/object") == (
          "bucket",
          "object",
      )
      assert bucket_and_object_from_uri(
          "ais://bucket_2/object/is/here"
      ) == ("bucket_2", "object/is/here")
  
      # Negative examples: invalid URI
      with pytest.raises(ValueError):
          bucket_and_object_from_uri("/local/file")
  
      with pytest.raises(ValueError):
          bucket_and_object_from_uri("local/file")
  
file_path: NeMo/tests/utils/test_utils.py
imports: import os
  from unittest import mock
  import pytest
  from nemo import __version__
  from nemo.utils.data_utils import ais_binary, ais_endpoint_to_dir, bucket_and_object_from_uri, datastore_path_to_webdataset_url, is_datastore_path, resolve_cache_dir
label_desc: Use image node_id 3 for calling the TestDataUtils obj's underlying member method code with example usage: obj.test_bucket_and_object_from_uri() without return types