public void When_calling_run_action_Then_expected_service_methods_are_called_once_each()
        {
            _sut.Run(() => { });

            _contextService.Received(1).InitContext();
            _contextService.Received(1).ClearCurrentContext();
            _contextFlushService.Received(1).FlushChanges(Arg.Any <DbContext_Fake>());
            _contextFlushService.Received().FlushChanges(_context);
        }