code: def test_output(self):
      class Model(chainer.Chain):
          def forward(self, x, t):
              return F.select_item(x, t)
  
      model = Model()
      x = input_generator.increasing(3, 5)
      t = np.array([4, 1, 0], dtype=np.int32)
  
      self.expect(
          model,
          (x, t),
          expected_num_initializers=0,
          skip_opset_version=list(range(1, 9)),
      )
  
imports: import chainer
  import chainer.functions
  from chainer import testing
  import numpy
  import onnx
  import pytest
  from onnx_chainer import export
  from onnx_chainer.testing import input_generator
  from onnx_chainer_tests.helper import ONNXModelChecker
  from onnx_chainer_tests.helper import ONNXModelTest
label_desc: Use image node_id 1 for calling the TestSelectItem obj's underlying member method code with example usage: obj.test_output() and returns: F