code: def test_pos_neg_duplicate_axis(self):
      x_data = numpy.random.uniform(-1, 1, (3, 2, 4)).astype(
          numpy.float32
      )
      x = chainer.Variable(x_data)
      with self.assertRaises(ValueError):
          self.function(x, axis=(1, -2))
  
imports: import unittest
  import numpy
  import chainer
  from chainer import functions
  from chainer import testing
  from chainer import utils
label_desc: Use image node_id 5 for calling the TestMinMaxInvalid obj's underlying member method code with example usage: obj.test_pos_neg_duplicate_axis() without return types