code: def test_firls_freqz(self, xp, scp):
      N = 11  # number of taps in the filter
      a = 0.1  # width of the transition band
  
      # design a halfband symmetric low-pass filter and check
      # the freq response
      h = scp.signal.firls(
          N, [0, a, 0.5 - a, 0.5], [1, 1, 0, 0], fs=1.0
      )
      w, H = scp.signal.freqz(h, 1)
      return w, H
  
imports: import cupy
  import cupyx.scipy.signal
  from cupy import testing
  import pytest
  from pytest import raises
label_desc: Use image node_id 3 for calling the TestFirls obj's underlying member method code with example usage: obj.test_firls_freqz(xp, scp) and returns: w,  H