def test_pid_to_service_dbus_invalid_pid(self):
"""
Test translating an invalid PID to a service name via DBUS.
"""
class DBusException(Exception):
"""
Raised by DBUS, e.g. when a PID does not belong to a service
"""
...
dbus_mock = Mock()
dbus_mock.DBusException = DBusException()
dbus_mock.GetUnitByPID = Mock(site_effect=dbus_mock.DBusException)
with patch("salt.utils.systemd.dbus", dbus_mock):
assert _systemd.pid_to_service(99999) is None
