public function it_throw_an_exception_if_trying_to_update_a_model_with_exits_false()
{
$connection = \Mockery::mock(Connection::class);
$model = new PersistenceModelTest();
$model->exists = false;
$this->setExpectedException('Exception');
$persistence = new EloquentPersistence($connection);
$persistence->model($model);
$persistence->update();
}