code: def test_copysign_combination(self, xp, dtype_a, dtype_b):
      a = testing.shaped_arange((2, 3), xp, dtype_a)
      b = testing.shaped_reverse_arange((2, 3), xp, dtype_b)
      return xp.copysign(a, b)
  
file_path: cupy/tests/cupy_tests/math_tests/test_floating.py
imports: import unittest
  import numpy
  import cupy
  from cupy import testing
label_desc: Use image node_id 2 for calling the TestFloating obj's underlying member method code with example usage: obj.test_copysign_combination(xp, dtype_a, dtype_b) and returns: xp