code: def test_negbound(self):
      xvec = np.arange(12)
      xlow = -6
      xhigh = 4
  
      # Calculate the upper bound,
      # Keeping the 1 index in mind
      def ubound(xl, xh):
          return xh - xl + 1
  
      rval = self.module.foo(
          is_=xlow, ie_=xhigh, arr=xvec[: ubound(xlow, xhigh)]
      )
      expval = np.arange(11, dtype=np.float32)
      assert np.allclose(rval, expval)
  
file_path: numpy/numpy/f2py/tests/test_regression.py
imports: import os
  import pytest
  import numpy
  from .None import util
label_desc: Use image node_id 1 for calling the TestNegativeBounds obj's underlying member method code with example usage: obj.test_negbound() and returns: unknown