code: def test_to_xarray_empty(self, df):
      from xarray import Dataset
  
      df.index.name = "foo"
      result = df[0:0].to_xarray()
      assert result.dims["foo"] == 0
      assert isinstance(result, Dataset)
  
file_path: pandas/pandas/tests/generic/test_to_xarray.py
imports: import numpy
  import pytest
  from pandas import Categorical, DataFrame, MultiIndex, Series, date_range
  import pandas._testing
label_desc: Use image node_id 3 for calling the TestDataFrameToXArray obj's underlying member method code with example usage: obj.test_to_xarray_empty(df) without return types