code: def test_errors(self):
      with self.assertRaises(TypeError):
          LeapFrog(
              model=self.test_model,
              position=1,
              momentum=[1, 1],
              stepsize=0.1,
              grad_log_pdf=GradLogPDFGaussian,
          )
      with self.assertRaises(TypeError):
          LeapFrog(
              model=self.test_model,
              position=[1, 1],
              momentum=1,
              stepsize=0.1,
              grad_log_pdf=GradLogPDFGaussian,
          )
      with self.assertRaises(ValueError):
          LeapFrog(
              model=self.test_model,
              position=[1, 1],
              momentum=[1],
              stepsize=0.1,
              grad_log_pdf=GradLogPDFGaussian,
          )
      with self.assertRaises(TypeError):
          LeapFrog(
              model=self.test_model,
              position=[1],
              momentum=[1],
              stepsize=0.1,
              grad_log_pdf=1,
          )
      with self.assertRaises(ValueError):
          LeapFrog(
              model=self.test_model,
              position=[1, 1],
              momentum=[1, 1],
              stepsize=0.1,
              grad_log_pdf=GradLogPDFGaussian,
          )
      with self.assertRaises(TypeError):
          LeapFrog(
              model=self.test_model,
              position=[1, 1, 1],
              momentum=[1, 1, 1],
              stepsize=0.1,
              grad_log_pdf=GradLogPDFGaussian,
              grad_log_position=1,
          )
      with self.assertRaises(ValueError):
          LeapFrog(
              model=self.test_model,
              position=[1, 1, 1],
              momentum=[1, 1, 1],
              stepsize=0.1,
              grad_log_pdf=GradLogPDFGaussian,
              grad_log_position=[1, 1],
          )
  
imports: import unittest
  import numpy
  from pgmpy.factors.distributions import GaussianDistribution
  from pgmpy.sampling import LeapFrog, ModifiedEuler, GradLogPDFGaussian
label_desc: Use image node_id 2 for calling the TestLeapFrog obj's underlying member method code with example usage: obj.test_errors() without return types