docstr: Creates some test specific attributes.
docstr_tok: ["Creates","some","test","specific","attributes","."]
code: def setUp(self):
      """Creates some test specific attributes."""
      super().setUp()
      self.reverb_class = effects.ExpDecayReverb
      self.audio = tf.zeros((3, 16000))
      self.construct_args = {"reverb_length": 100}
      self.call_args = {
          "gain": tf.zeros((3, 1)),
          "decay": tf.zeros((3, 1)),
      }
  
imports: from absl.testing import parameterized
  from ddsp import effects
  import tensorflow.compat.v2
label_desc: Use image node_id 1 for calling the ExpDecayReverbTest obj's underlying member method code with example usage: obj.setUp() without return types