code: def before_test(self, test_name):
      if self.axis is not None and self.shape == ():
          raise unittest.SkipTest("Axis must be None on 0-dim input.")
  
file_path: chainer/tests/chainer_tests/functions_tests/math_tests/test_logsumexp.py
imports: import unittest
  import numpy
  from chainer import functions
  from chainer import testing
  from chainer.utils import force_array
label_desc: Use image node_id 2 for calling the TestLogSumExp obj's underlying member method code with example usage: obj.before_test(test_name) without return types