code: def setUp(self):
      class Model(chainer.Chain):
          def __init__(self):
              super(Model, self).__init__()
  
          def __call__(self, x, t):
              return chainer.functions.softmax_cross_entropy(x, t)
  
      self.model = Model()
      self.x = np.random.uniform(size=self.in_shape).astype("f")
      self.t = np.random.randint(
          size=self.in_shape[0], low=0, high=self.in_shape[1]
      ).astype(np.int32)
  
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 1 for calling the TestSoftmaxCrossEntropy obj's underlying member method code with example usage: obj.setUp() and returns: chainer