class_docstr: common layer unittest 
class_docstr_tok: ["common","layer","unittest"]
docstr: test embedding look up
docstr_tok: ["test","embedding","look","up"]
code: def test_embedding_look_up(self):
      """test embedding look up"""
      text_inputs = [0, 1, 2]
      vocab_size = 3
      embedding_size = 512
      output = cl.embedding_look_up(
          text_inputs, vocab_size, embedding_size
      )
      output_shape = [3, 512, 1]
      self.assertAllEqual(tf.shape(output), output_shape)
  
file_path: delta/delta/layers/common_layers_test.py
imports: import delta.compat
  from absl import logging
  import common_layers
label_desc: Use image node_id 7 for calling the LossUtilTest obj's underlying member method code with example usage: obj.test_embedding_look_up() without return types