code: def test_output(self):
      self.expect(
          self.model,
          [self.x, self.t],
          name=self.name,
          skip_opset_version=[7, 8],
      )
  
file_path: chainer/tests/onnx_chainer_tests/functions_tests/test_loss.py
imports: import unittest
  import chainer
  from chainer import testing
  import numpy
  from onnx_chainer_tests.helper import ONNXModelTest
label_desc: Use image node_id 2 for calling the TestSoftmaxCrossEntropy obj's underlying member method code with example usage: obj.test_output() without return types