code: def test_rfft(self, N, num, window, xp, scp):
      # Make sure the speed up using rfft gives the same result as the normal
      # way using fft
      results = []
      x = xp.linspace(0, 10, N, endpoint=False)
      y = xp.cos(-(x**2) / 6.0)
  
      results.append(scp.signal.resample(y, num, window=window).copy())
      results.append(
          scp.signal.resample(y + 0j, num, window=window).real.copy()
      )
  
      y = xp.array([xp.cos(-(x**2) / 6.0), xp.sin(-(x**2) / 6.0)])
      y_complex = y + 0j
      results.append(
          scp.signal.resample(y, num, axis=1, window=window).copy()
      )
      results.append(
          scp.signal.resample(
              y_complex, num, axis=1, window=window
          ).real.copy()
      )
      return results
  
imports: import cupy
  from cupy import testing
  import cupyx.scipy.signal
  import cupyx.scipy.signal.windows
  import numpy
  import pytest
  from math import gcd
label_desc: Use image node_id 2 for calling the TestResample obj's underlying member method code with example usage: obj.test_rfft(N, num, window, xp, scp) and returns: results