code: def test_format_empty(self):
      # GH35712
      empty_idx = RangeIndex(0)
      msg = r"RangeIndex\.format is deprecated"
      with tm.assert_produces_warning(FutureWarning, match=msg):
          assert empty_idx.format() == []
      with tm.assert_produces_warning(FutureWarning, match=msg):
          assert empty_idx.format(name=True) == [""]
  
imports: import numpy
  import pytest
  from pandas.core.dtypes.common import ensure_platform_int
  import pandas
  from pandas import Index, RangeIndex
  import pandas._testing
label_desc: Use image node_id 38 for calling the TestRangeIndex obj's underlying member method code with example usage: obj.test_format_empty() without return types