class_docstr: Common tests for noisy mixture distributions.
code: def test_stable(self):
      # An extreme distribution that has probability 1 at 0 and probability 0
      # otherwise.
      dist = self.dist_cls(loc=[0, 0], scale=[0, 0], weight=[0.5, 0.5])
      with self.subTest("AtTheMode"):
          self.assertAllClose(dist.prob([0]), [1.0])
      with self.subTest("NotAtTheMode"):
          self.assertAllClose(dist.prob([1]), [0.0])
  
imports: import tensorflow
  from tensorflow_compression.python.distributions import helpers
  from tensorflow_compression.python.distributions import uniform_noise
label_desc: Use image node_id 8 for calling the MixtureTest obj's underlying member method code with example usage: obj.test_stable() without return types