class_docstr: Common tests for noisy location-scale family of distributions.
code: def test_is_pmf_at_integer_grid(self):
      # When evaluated at integers, P_i = p(c+i) should be a valid PMF.
      dist = self.dist_cls(loc=0.1, scale=0.3)
      x = 0.05 + tf.range(-100, 100, dtype=tf.float32)
      pmf_probs = dist.prob(x)
      self.assertAllClose(tf.reduce_sum(pmf_probs), 1.0)
  
imports: import tensorflow
  from tensorflow_compression.python.distributions import helpers
  from tensorflow_compression.python.distributions import uniform_noise
label_desc: Use image node_id 5 for calling the LocationScaleTest obj's underlying member method code with example usage: obj.test_is_pmf_at_integer_grid() without return types