code: def test_copysign_float(self, xp, dtype):
      a = xp.array([-xp.inf, -3, -0.0, 0, 3, xp.inf], dtype=dtype)[
          :, None
      ]
      b = xp.array([-xp.inf, -3, -0.0, 0, 3, xp.inf], dtype=dtype)[
          None, :
      ]
      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 3 for calling the TestFloating obj's underlying member method code with example usage: obj.test_copysign_float(xp, dtype) and returns: xp