code: def test_motifs_empty(self):
      res = motifs([], ([], []))
      assert res == ([], [])
  
file_path: matrixprofile-ts/tests/test_motifs.py
imports: import sys
  from matrixprofile.motifs import *
  import numpy
  import pytest
label_desc: Use image node_id 6 for calling the TestClass obj's underlying member method code with example usage: obj.test_motifs_empty() without return types