code: def test_roll(self, xp, dtype):
      x = testing.shaped_arange(self.shape, xp, dtype)
      return xp.roll(x, self.shift, axis=self.axis)
  
imports: import unittest
  import numpy
  import pytest
  import cupy
  from cupy import testing
label_desc: Use image node_id 1 for calling the TestRoll obj's underlying member method code with example usage: obj.test_roll(xp, dtype) and returns: xp