code: def test_broadcast(self, input_data, input_var, input_layer):
      from lasagne.layers.shape import DimshuffleLayer
  
      ds = DimshuffleLayer(input_layer, [0, 1, 2, 3, 4, "x"])
      assert ds.output_shape == (2, 3, 1, 5, 7, 1)
      assert ds.get_output_for(input_var).eval(
          {input_var: input_data}
      ).shape == (2, 3, 1, 5, 7, 1)
  
imports: import numpy
  import pytest
  import theano
  from mock import Mock
label_desc: Use image node_id 8 for calling the TestDimshuffleLayer obj's underlying member method code with example usage: obj.test_broadcast(input_data, input_var, input_layer) without return types