text: # This code is part of Qiskit.
  #
  # (C) Copyright IBM 2017, 2020.
  #
  # This code is licensed under the Apache License, Version 2.0. You may
  # obtain a copy of this license in the LICENSE.txt file in the root directory
  # of this source tree or at http://www.apache.org/licenses/LICENSE-2.0.
  #
  # Any modifications or derivative works of this code must retain this
  # copyright notice, and modified files need to carry a notice indicating
  # that they have been altered from the originals.
  
  """Test library of quantum volume circuits."""
  
  import unittest
  
  from qiskit.test.base import QiskitTestCase
  from qiskit.circuit import QuantumCircuit
  from qiskit.circuit.library import QuantumVolume
  from qiskit.quantum_info import Operator
  from qiskit.quantum_info.random import random_unitary
  
  
  class TestQuantumVolumeLibrary(QiskitTestCase):
      """Test library of quantum volume quantum circuits."""
  
      def test_qv(self):
          """Test qv circuit."""
          circuit = QuantumVolume(2, 2, seed=2, classical_permutation=False)
          expected = QuantumCircuit(2)
          expected.swap(0, 1)
          expected.append(random_unitary(4, seed=837), [0, 1])
          expected.append(random_unitary(4, seed=262), [0, 1])
          expected = Operator(expected)
          simulated = Operator(circuit)
          self.assertTrue(expected.equiv(simulated))
  
  
  if __name__ == '__main__':
      unittest.main()
  