code: def test_basic(self):
      def f(n):
          i = 0
          j = 0
          s = 0
          while i < n:
              while j < i:
                  j += 3
              u = i + j  # 'u' is not defined within the inner loop
              s += u
              i += 1
              j = 0
          return s, i, j, n
  
      self.assertTransformedResult(f, custom_constant(5), (25, 5, 0, 5))
  
imports: import collections
  from nvidia.dali._autograph.converters import break_statements
  from nvidia.dali._autograph.converters import continue_statements
  from nvidia.dali._autograph.converters import control_flow
  from nvidia.dali._autograph.core import converter_testing
  from nvidia.dali._autograph.utils.all_utils import custom_constant
label_desc: Use image node_id 1 for calling the NestedControlFlowTest obj's underlying member method code with example usage: obj.test_basic() and returns: s,  i,  j,  n