code: def test_output(self):
      model = chainer.Sequential(F.where)
      cond = np.array([[1, 0, 0], [0, 1, 0]], dtype=np.bool)
      x = input_generator.increasing(2, 3)
      y = np.zeros((2, 3), np.float32)
      self.expect(model, (cond, x, y), skip_opset_version=[7, 8])
  
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 TestWhere obj's underlying member method code with example usage: obj.test_output() without return types