code: def test_isinf(self):
      self.check_unary_inf("isinf")
  
file_path: cupy/tests/cupy_tests/logic_tests/test_content.py
imports: import unittest
  import numpy
  from cupy import testing
label_desc: Use image node_id 4 for calling the TestContent obj's underlying member method code with example usage: obj.test_isinf() without return types