code: def setUp(self):
      self.batch_size = 30
      self.action_size = 3
      self.n_taus = 5
      self.quantiles = np.random.normal(
          size=(self.batch_size, self.n_taus, self.action_size),
      ).astype(np.float32)
      self.av = action_value.QuantileDiscreteActionValue(
          chainer.Variable(self.quantiles)
      )
      self.q_values = self.quantiles.mean(axis=1)
  
imports: import unittest
  import chainer
  import chainer.functions
  from chainer import testing
  import numpy
  from chainerrl import action_value
label_desc: Use image node_id 1 for calling the TestQuantileDiscreteActionValue obj's underlying member method code with example usage: obj.setUp() without return types