code: def testLogPdfAssertsOnInvalidSample(self):
      d = chi.Chi(df=13.37, validate_args=True)
      with self.assertRaisesOpError("Condition x >= 0"):
          self.evaluate(d.log_prob([14.2, -5.3]))
  
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 2 for calling the ChiTest obj's underlying member method code with example usage: obj.testLogPdfAssertsOnInvalidSample() without return types