<?php

use Symfony\Component\Form\AbstractType;
use Symfony\Component\Form\Extension\Core\Type\TextType;
use Symfony\Component\Form\Test\TypeTestCase;
use Symfony\Component\Form\FormBuilderInterface;
use Symfony\Bridge\Doctrine\Form\Type\EntityType;
use Symfony\Component\Form\PreloadedExtension;
use Doctrine\Persistence\ManagerRegistry;
use PHPSnippets\Db\Entity\Library;
use Doctrine\ORM\EntityManagerInterface;
use Doctrine\ORM\EntityRepository;
use Doctrine\ORM\QueryBuilder;
use Doctrine\ORM\AbstractQuery;
use Doctrine\ORM\Mapping\ClassMetadata;

/**
 * How more complex Symfony form tests shouldn't be done
 * when other form types or dependencies are involved.
 *
 * More about Symfony form tests can be read here: https://symfony.com/doc/current/form/unit_testing.html
 */
class FormTest extends TypeTestCase
{
    private $library;
    
    protected function setUp() : void
    {
        /*
         * Create one entity for the EntityType list.
         *
         * You usually don't mock or stub VOs or DTOs
         */
        $this->library = $this->createMock(Library::class);
        $this->library->method('getId')
            ->willReturn('bar');
        $this->library->method('getName')
            ->willReturn('bar');
        
        parent::setUp();
    }
    
    /**
     * Testing the FooType form type
     */
    public function testFormType() : void
    {
        $formData = [
            'foo' => 'foo',
            'library' => 'bar',
        ];
        
        $objectToCompare = new Foo();
         
        $form = $this->factory->create(FooType::class, $objectToCompare);
        
        $object = new Foo();
        $object->foo = 'foo';
        $object->library = $this->library;
        
        $form->submit($formData);
        
        $this->assertTrue($form->isSynchronized());
        
        $this->assertEquals($object, $objectToCompare);
        
        $view = $form->createView(); 
        $children = $view->children; 
        
        foreach (array_keys($formData) as $key) {
            $this->assertArrayHasKey($key, $children);
        }
    }
    
    protected function getExtensions()
    {
        /*
         * Creating mocks/stubs for the EntityType.
         *
         * These mocks/stubs for the EntityType are a huge
         * effort and overhead, that makes a unit test for
         * form types more complicated. Symfony form tests
         * should usually be more of an integration/functional
         * test type.
         */
        $query = $this->createMock(AbstractQuery::class);
        $query->method('execute')
            ->willReturn([$this->library]);
        
        $queryBuilder = $this->createMock(QueryBuilder::class);
        $queryBuilder->expects(self::once())
            ->method('getQuery')
            ->willReturn($query);
        
        $repository = $this->createMock(EntityRepository::class);
        $repository->method('createQueryBuilder')
            ->with('e', null)
            ->willReturn($queryBuilder);
        
        $metaData = $this->createMock(ClassMetadata::class);
        $metaData = new ClassMetadata(Library::class);
        
        $entityManager = $this->createMock(EntityManagerInterface::class);
        $entityManager->method('getRepository')
            ->with(Library::class)
            ->willReturn($repository);
        $entityManager->method('getClassMetadata')
            ->with(Library::class)
            ->willReturn($metaData);
    
        $registry = $this->createMock(ManagerRegistry::class);
        $registry->method('getManagerForClass')
            ->with(Library::class)
            ->willReturn($entityManager);
        
        $entityType = new EntityType($registry);
        
        return [ 
            new PreloadedExtension([$entityType], []),
        ];
    }
}

/**
 * The custom form type that is tested.
 */
class FooType extends AbstractType
{
    public function buildForm(FormBuilderInterface $builder, array $options)
    {
        $builder->add('foo', TextType::class, [
            'label' => 'Text',
        ])->add('library', EntityType::class, [
            'label' => 'Field',
            'class' => Library::class,
            'choice_label' => 'name',
            'choice_value' => 'id',
        ]);
    }
}

/**
 * The DTO for FooType the form type.
 */
class Foo
{
    public $foo;
    public $library;
}

Time: 00:00.045, Memory: 22.00 MB

OK (1 test, 0 assertions)

• Testing collections in PHPUnit
• Integrationtests in PHPUnit with mock proxies
• Mocking a static method with Mockery

PHP 8.3, Laminas MVC 3.2, Symfony 5.2, Laravel 8.28, PHPUnit 9.5, Doctrine ORM 2.8