code: def test_attention_errors(self):
      layer = layers.AdditiveAttention()
      tensor = np.array([[[1.0, 1.0], [1.0, 1.0]]])
      with self.assertRaisesRegex(
          ValueError, "must be called on a list"
      ):
          layer(tensor)
  
      with self.assertRaisesRegex(ValueError, "length 2 or 3"):
          layer([tensor, tensor, tensor, tensor])
  
      with self.assertRaisesRegex(
          ValueError, "layer mask must be a list"
      ):
          layer([tensor, tensor], mask=tensor)
  
      with self.assertRaisesRegex(ValueError, "length 2 or 3"):
          layer([tensor, tensor], mask=[tensor])
  
file_path: keras/keras/layers/attention/additive_attention_test.py
imports: import numpy
  from keras import layers
  from keras import testing
label_desc: Use image node_id 4 for calling the AdditiveAttentionTest obj's underlying member method code with example usage: obj.test_attention_errors() without return types