text: # This code is part of Qiskit.
  #
  # (C) Copyright IBM 2021.
  #
  # 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.
  
  """Fake backend class for tests."""
  from qiskit.providers.backend import BackendV1
  from qiskit.providers.models import QasmBackendConfiguration
  from qiskit.providers.options import Options
  
  from qiskit.result import Result
  
  from qiskit_experiments.test.utils import FakeJob
  
  
  class FakeBackend(BackendV1):
      """
      Fake backend for test purposes only.
      """
  
      def __init__(self):
          configuration = QasmBackendConfiguration(
              backend_name="dummy_backend",
              backend_version="0",
              n_qubits=int(1e6),
              basis_gates=["barrier", "x", "delay", "measure"],
              gates=[],
              local=True,
              simulator=True,
              conditional=False,
              open_pulse=False,
              memory=False,
              max_shots=int(1e6),
              coupling_map=None,
          )
          super().__init__(configuration)
  
      @classmethod
      def _default_options(cls):
          return Options()
  
      def run(self, run_input, **options):
          result = {
              "backend_name": "Dummmy backend",
              "backend_version": "0",
              "qobj_id": 0,
              "job_id": 0,
              "success": True,
              "results": [],
          }
          return FakeJob(backend=self, result=Result.from_dict(result))
  