code: def test_unit_sphere_enforcement(self, start, end):
      # geometric_slerp() should raise on input that clearly
      # cannot be on an n-sphere of radius 1
      with pytest.raises(ValueError, match="unit n-sphere"):
          geometric_slerp(start=start, end=end, t=np.linspace(0, 1, 5))
  
imports: import numpy
  from numpy.testing import assert_allclose
  import pytest
  from scipy.spatial import geometric_slerp
label_desc: Use image node_id 12 for calling the TestGeometricSlerp obj's underlying member method code with example usage: obj.test_unit_sphere_enforcement(start, end) without return types