code: def test_local_vars(tmp_dir, dvc):
      resolver = DataResolver(
          dvc, tmp_dir.fs_path, {"vars": [{"foo": "bar", "bar": "foo"}]}
      )
      assert resolver.context == {"foo": "bar", "bar": "foo"}
  
imports: from copy import deepcopy
  import pytest
  from dvc.parsing import DEFAULT_PARAMS_FILE, DataResolver, ResolveError
  from dvc.parsing.context import Context
  from dvc.utils.serialize import dumps_yaml
  from .None import CONTEXT_DATA, RESOLVED_DVC_YAML_DATA, TEMPLATED_DVC_YAML_DATA
label_desc: Use image node_id 4 for calling a global function with example usage: test_local_vars(tmp_dir, dvc) without return types