code: def test_output_is_correct(self):
      processor = processors.Add(name="add")
      x = tf.zeros((2, 3), dtype=tf.float32) + 1.0
      y = tf.zeros((2, 3), dtype=tf.float32) + 2.0
  
      output = processor(x, y)
  
      expected = np.zeros((2, 3), dtype=np.float32) + 3.0
      self.assertAllEqual(expected, output)
  
file_path: ddsp/ddsp/processors_test.py
imports: from absl.testing import parameterized
  from ddsp import core
  from ddsp import effects
  from ddsp import processors
  from ddsp import synths
  import numpy
  import tensorflow.compat.v2
label_desc: Use image node_id 1 for calling the AddTest obj's underlying member method code with example usage: obj.test_output_is_correct() without return types