def METHOD_NAME(self):
    """Test default backend set."""
    job = MagicMock()
    job.backend().name = "ibm_gotham"
    service = MagicMock()
    service.run.return_value = job
    service.channel = "ibm_cloud"
    session = Session(service=service)
    session.run(program_id="foo", inputs={})
    self.assertEqual(session.backend(), "ibm_gotham")