code: def test_get_output_for_outdim3(self, layer_outdim3):
      input = np.random.random((2, 3, 4, 5))
      result = layer_outdim3.get_output_for(theano.shared(input)).eval()
      assert (
          result == input.reshape((input.shape[0], input.shape[1], -1))
      ).all()
  
imports: import numpy
  import pytest
  import theano
  from mock import Mock
label_desc: Use image node_id 8 for calling the TestFlattenLayer obj's underlying member method code with example usage: obj.test_get_output_for_outdim3(layer_outdim3) without return types