code: def test_fromstring_empty():
      with assert_warns(DeprecationWarning):
          assert_equal(np.fromstring("xxxxx", sep="x"), np.array([]))
  
imports: import warnings
  import platform
  import pytest
  import numpy
  from numpy.testing import assert_, assert_equal, assert_raises, assert_warns, assert_array_equal, temppath, IS_MUSL
  from numpy._core.tests._locales import CommaDecimalPointLocale
label_desc: Use image node_id 9 for calling a global function with example usage: test_fromstring_empty() without return types