docstr: Test checking for datastore path.
          
docstr_tok: ["Test","checking","for","datastore","path","."]
code: def test_is_datastore_path(self):
      """Test checking for datastore path."""
      # Positive examples
      assert is_datastore_path("ais://positive/example")
      # Negative examples
      assert not is_datastore_path("ais/negative/example")
      assert not is_datastore_path("/negative/example")
      assert not is_datastore_path("negative/example")
  
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 2 for calling the TestDataUtils obj's underlying member method code with example usage: obj.test_is_datastore_path() without return types