code: def setUp(self):
      if not hasattr(self, "visible"):
          self.visible = None
      if not hasattr(self, "size"):
          self.size = None
      if not hasattr(self, "n_point"):
          self.n_point = None
  
file_path: chainercv/tests/utils_tests/testing_tests/assertions_tests/test_assert_is_point.py
imports: import numpy
  import unittest
  from chainercv.utils import assert_is_point
  from chainercv.utils import testing
label_desc: Use image node_id 1 for calling the TestAssertIsPoint obj's underlying member method code with example usage: obj.setUp() without return types