code: def preprocess_input_test_data(self):
      time_step = gs.array([0.5])
      linear_vel = gs.array([1.0, 0.5])
      angular_vel = gs.array([0.0])
  
      data = [
          dict(
              sensor_input=gs.concatenate(
                  (time_step, linear_vel, angular_vel), axis=0
              ),
              expected=(time_step[0], linear_vel, angular_vel),
          )
      ]
  
      return self.generate_tests(data)
  
imports: import geomstats.backend
  from geomstats.algebra_utils import from_vector_to_diagonal_matrix
  from geomstats.test.data import TestData
label_desc: Use image node_id 6 for calling the LocalizationTestData obj's underlying member method code with example usage: obj.preprocess_input_test_data() and returns: self