code: def test_invalid_shape(self):
      w = numpy.empty(self.shape, dtype=numpy.float32)
      with self.assertRaises(ValueError):
          self.initializer(w)
  
imports: import unittest
  import numpy
  import chainer
  from chainer import backend
  from chainer import initializers
  from chainer import testing
label_desc: Use image node_id 2 for calling the TestIdentityInvalid obj's underlying member method code with example usage: obj.test_invalid_shape() without return types