code: def test_unsupported_y_arg_tfdata(self):
      with self.assertRaisesRegex(
          ValueError, "`y` should not be passed"
      ):
          x = tf.data.Dataset.from_tensor_slices(
              np.random.random((100, 16))
          )
          y = np.random.random((100, 4))
          _ = epoch_iterator.EpochIterator(x=x, y=y)
  
imports: import numpy
  import pytest
  import tensorflow
  from keras import backend
  from keras import testing
  from keras.trainers import data_adapters
  from keras.trainers import epoch_iterator
label_desc: Use image node_id 5 for calling the TestEpochIterator obj's underlying member method code with example usage: obj.test_unsupported_y_arg_tfdata() without return types