code: def test(self, xp, dtype):
      x = testing.shaped_arange(self.shape_x, xp, dtype)
      y = testing.shaped_arange(self.shape_y, xp, dtype)
      if xp is numpy and self.f == "isin":
          return xp.in1d(x, y, self.assume_unique, self.invert).reshape(
              x.shape
          )
      return getattr(xp, self.f)(x, y, self.assume_unique, self.invert)
  
imports: import warnings
  import numpy
  from cupy import testing
label_desc: Use image node_id 1 for calling the TestIn1DIsIn obj's underlying member method code with example usage: obj.test(xp, dtype) and returns: getattr, xp