public function testSaveWithIdDoesNotChangeId()
{
$mongoId = new \MongoId('testUser');
$modelData = array('email' => '', 'firstName' => '', 'lastName' => '', 'displayName' => '');
$expectedModelData = $modelData;
$expectedModelData['_id'] = $mongoId;
$mapper = new Mapper();
$mapper->setCollection(new MongoCollectionMock($expectedModelData));
$model = new User();
$model->setData($modelData);
$model->setId($mongoId);
$mapper->save($model);
$this->assertEquals((string) $mongoId, $model->getId());
}
