code: def test_invalid_interval(self):
      with self.assertRaises(ValueError):
          functions.clip(self.x, 1.0, -1.0)
  
imports: import unittest
  import numpy
  import chainer
  from chainer.backends import cuda
  from chainer import functions
  from chainer import gradient_check
  from chainer import testing
  from chainer.testing import attr
label_desc: Use image node_id 2 for calling the TestClipInvalidInterval obj's underlying member method code with example usage: obj.test_invalid_interval() without return types