code: def test_single_unique_root(self, xp, scp):
      np.random.seed(1234)
      p = np.random.rand(100) + 1j * np.random.rand(100)
      p = xp.asarray(p)
  
      unique, multiplicity = scp.signal.unique_roots(p, 2)
      return unique, multiplicity
  
imports: import numpy
  import pytest
  import cupy
  from cupy import testing
  import cupyx.scipy.signal
label_desc: Use image node_id 7 for calling the TestUniqueRoots obj's underlying member method code with example usage: obj.test_single_unique_root(xp, scp) and returns: unique,  multiplicity