code: def test_changes_length_raises(self):
      s = Series([1, 2, 3])
      with pytest.raises(ValueError, match="change the shape"):
          s.sort_index(key=lambda x: x[:1])
  
imports: import numpy
  import pytest
  from pandas import DatetimeIndex, IntervalIndex, MultiIndex, Series
  import pandas._testing
label_desc: Use image node_id 8 for calling the TestSeriesSortIndexKey obj's underlying member method code with example usage: obj.test_changes_length_raises() without return types