code: def test_default_params_file(tmp_dir, dvc, vars_):
      (tmp_dir / DEFAULT_PARAMS_FILE).dump(DATA)
      resolver = DataResolver(dvc, tmp_dir.fs_path, vars_)
      assert resolver.context == DATA
  
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 6 for calling a global function with example usage: test_default_params_file(tmp_dir, dvc, vars_) without return types