code: def test_zmap_empty(self, xp, scp, dtype):
      x = xp.array([], dtype=dtype)
      y = xp.array([1, 3, 5], dtype=dtype)
      return scp.stats.zmap(x, y)
  
imports: import numpy
  import pytest
  import cupy
  from cupy import testing
  import cupyx
  import cupyx.scipy.stats
label_desc: Use image node_id 8 for calling the TestZmap obj's underlying member method code with example usage: obj.test_zmap_empty(xp, scp, dtype) and returns: scp