code: def test_fails_for_invalid_shape(self):
      with self.assertRaises(ValueError):
          initializers.IdentityInitializer()((2, 3), dtype=tf.float32)
  
imports: import tensorflow
  from tensorflow_compression.python.layers import initializers
label_desc: Use image node_id 3 for calling the InitializerTest obj's underlying member method code with example usage: obj.test_fails_for_invalid_shape() without return types