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                <?php  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                /*  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 * This file is part of the Doctrine Bundle  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 *  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 * The code was originally distributed inside the Symfony framework.  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 *  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 * (c) Fabien Potencier <[email protected]>  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 * (c) Doctrine Project, Benjamin Eberlei <[email protected]>  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 *  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 * For the full copyright and license information, please view the LICENSE  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 * file that was distributed with this source code.  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                */  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                namespace Doctrine\Bundle\DoctrineBundle\Tests\Twig;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                use Doctrine\Bundle\DoctrineBundle\Repository\RepositoryTrait;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                use Doctrine\ORM\EntityManagerInterface;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                use Doctrine\ORM\EntityRepository;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                use Doctrine\ORM\QueryBuilder;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                use PHPUnit\Framework\TestCase;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                class RepositoryTraitTest extends TestCase  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    public function testBasicTraitFunctionality()  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        $em = $this->getMockBuilder(EntityManagerInterface::class)->getMock();  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        $repo = $this->getMockBuilder(EntityRepository::class)->disableOriginalConstructor()->getMock();  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        $em->expects($this->once())  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                            ->method('getRepository') | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                            ->with('App\Entity\CoolStuff') | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                            ->will($this->returnValue($repo));  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        $qb = new QueryBuilder($em);  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        $repo->expects($this->once())  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                            ->method('createQueryBuilder') | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                            ->with('cs') | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                            ->willReturn($qb);  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        $stubRepo = new StubRepository($em);  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        $this->assertSame($qb, $stubRepo->createQueryBuilder('cs')); | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    }  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                }  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                class StubRepository  | 
            
                            
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                { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    use RepositoryTrait;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    private $em;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    public function __construct(EntityManagerInterface $em)  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        $this->em = $em;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    }  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    protected function getEntityManager()  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        return $this->em;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    }  | 
            
            
                                                                                                            
                                                                
            
                                    
            
            
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                    protected function getClassName()  | 
            
            
                                                        
            
                                    
            
            
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                    { | 
            
            
                                                        
            
                                    
            
            
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                        return 'App\Entity\CoolStuff';  | 
            
            
                                                        
            
                                    
            
            
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                    }  | 
            
            
                                                        
            
                                    
            
            
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                }  | 
            
            
                        
Having each class in a dedicated file usually plays nice with PSR autoloaders and is therefore a well established practice. If you use other autoloaders, you might not want to follow this rule.