code: def test_unknown_clip(self):
      for xp in (numpy, cupy):
          a = xp.array([0, 3, -1, 5])
          c = testing.shaped_arange((3, 4), xp, numpy.float32)
          with pytest.raises(ValueError):
              a.choose(c, mode="unknow")
  
imports: import unittest
  import numpy
  import pytest
  import cupy
  from cupy import testing
label_desc: Use image node_id 6 for calling the TestChoose obj's underlying member method code with example usage: obj.test_unknown_clip() without return types