OwenIt\Auditing\Observers\Audit::saving PHP Method

    public function saving(Auditable $model)
    {
        $model->prepareAudit();
    }

 public function test_saving_handler_prepare_audit()
 {
     $observer = new Audit();
     $model = Mockery::mock(Auditable::class);
     $model->shouldReceive('prepareAudit');
     $observer->saving($model);
 }