refactor: improve test setup and entity references in SingleTaskControllerTest

- Remove unnecessary kernel boot in `setUp`
- Use DI container retrieval for entity manager
- Replace string class references with `::class` constants

src/Bundle/ChillTaskBundle/Tests/Controller/SingleTaskControllerTest.php

@@ -13,6 +13,7 @@ namespace Chill\TaskBundle\Tests\Controller;
 
 use Chill\MainBundle\Entity\Center;
 use Chill\MainBundle\Tests\TestHelper;
+use Chill\PersonBundle\Entity\Person;
 use Faker;
 use Symfony\Bundle\FrameworkBundle\Test\WebTestCase;
 
@@ -30,7 +31,6 @@ final class SingleTaskControllerTest extends WebTestCase
 
     protected function setUp(): void
     {
-        self::bootKernel();
         $this->faker = Faker\Factory::create('fr');
     }
 
@@ -75,26 +75,28 @@ final class SingleTaskControllerTest extends WebTestCase
     }
 
     /**
-     * @return \Chill\PersonBundle\Entity\Person
+     * @return Person
      */
     protected function getRandomPerson(mixed $centerName)
     {
-        $em = self::$kernel
+        $container = self::getContainer();
-            ->getContainer()
+        $em = $container
             ->get('doctrine.orm.entity_manager');
 
         $centers = $em
             ->getRepository(Center::class)
             ->findAll();
 
-        $center = \array_filter(
+        $center = \array_values(
-            $centers,
+            \array_filter(
-            static fn (Center $c) => $c->getName() === $centerName
+                $centers,
+                static fn (Center $c) => $c->getName() === $centerName
+            )
         )[0];
 
         $ids = $em
             ->createQuery(
-                'SELECT p.id FROM ChillPersonBundle:Person p '
+                'SELECT p.id FROM '.Person::class.' p '
                 .'WHERE p.center = :center'
             )
             ->setParameter('center', $center)
@@ -102,10 +104,8 @@ final class SingleTaskControllerTest extends WebTestCase
 
         $id = $ids[\array_rand($ids)];
 
-        return self::$kernel
+        return $em
-            ->getContainer()
+            ->getRepository(Person::class)
-            ->get('doctrine.orm.entity_manager')
-            ->getRepository(\Chill\PersonBundle\Entity\Person::class)
             ->find($id);
     }
 }