code: def test_unsigned_max(self):
      types = np.sctypes["uint"]
      for T in types:
          with np.errstate(over="ignore"):
              max_calculated = T(0) - T(1)
          assert_equal(iinfo(T).max, max_calculated)
  
imports: import warnings
  import numpy
  import pytest
  from numpy.core import finfo, iinfo
  from numpy import half, single, double, longdouble
  from numpy.testing import assert_equal, assert_, assert_raises
  from numpy.core.getlimits import _discovered_machar, _float_ma
label_desc: Use image node_id 2 for calling the TestIinfo obj's underlying member method code with example usage: obj.test_unsigned_max() without return types