code: def setup(self):
      (in_dtype,) = self.in_dtypes
      in_kind = numpy.dtype(in_dtype).kind
  
      if numpy.dtype(in_dtype).kind != "f":
          self.skip_backward_test = True
          self.skip_double_backward_test = True
  
      if in_dtype == "float16":
          self.check_forward_options.update(
              {"rtol": 1e-3, "atol": 1e-3}
          )
          self.check_backward_options.update(
              {"rtol": 3e-3, "atol": 3e-3}
          )
          self.check_double_backward_options.update(
              {"rtol": 1e-2, "atol": 1e-2}
          )
      else:
          self.check_backward_options.update(
              {"rtol": 1e-3, "atol": 1e-4}
          )
          self.check_double_backward_options.update(
              {"rtol": 1e-3, "atol": 1e-4}
          )
  
      input = self.input
      if (
          in_kind == "u"
          and isinstance(input, (int, float))
          and input < 0
      ):
          raise unittest.SkipTest(
              "Combination of uint dtype and negative input cannot be "
              "tested"
          )
  
imports: import unittest
  import numpy
  import chainerx
  from chainerx_tests import array_utils
  from chainerx_tests import dtype_utils
label_desc: Use image node_id 1 for calling the UnaryMathTestBase obj's underlying member method code with example usage: obj.setup() without return types