code: def testPdfOnBoundary(self):
      d = chi.Chi(df=[1.0, 3.0], validate_args=True)
      log_prob_boundary = self.evaluate(d.log_prob(0.0))
  
      self.assertAllNegativeInf(log_prob_boundary[1])
  
imports: import numpy
  from scipy import special
  from scipy import stats
  import tensorflow.compat.v2
  from tensorflow_probability.python.distributions import chi
  from tensorflow_probability.python.distributions import kullback_leibler
  from tensorflow_probability.python.internal import test_util
label_desc: Use image node_id 3 for calling the ChiTest obj's underlying member method code with example usage: obj.testPdfOnBoundary() without return types