code: def test_unit_vector(self):
      for _ in range(10):
          vector = np.random.rand(3)
          norm_vector = unit_vector(vector)
          self.assertAlmostEqual(np.linalg.norm(norm_vector), 1.0)
  
file_path: deepchem/deepchem/utils/test/test_geometry_utils.py
imports: import unittest
  import numpy
  from deepchem.utils import geometry_utils
  from deepchem.utils.geometry_utils import unit_vector
  from deepchem.utils.geometry_utils import angle_between
  from deepchem.utils.geometry_utils import compute_pairwise_distances
  from deepchem.utils.geometry_utils import generate_random_unit_vector
  from deepchem.utils.geometry_utils import generate_random_rotation_matrix
  from deepchem.utils.geometry_utils import is_angle_within_cutoff
label_desc: Use image node_id 3 for calling the TestGeometryUtils obj's underlying member method code with example usage: obj.test_unit_vector() without return types