feat(tests): add a method to generate the IRI from a resource (#5582)

* feat: add a method to generate the IRI from a resource

* fix: code style

* fix: use new method inside findByIri

* refactor: rename method

* fix: method name

src/Symfony/Bundle/Test/ApiTestCase.php

@@ -94,9 +94,17 @@ protected function findIriBy(string $resourceClass, array $criteria): ?string
             return null;
         }
 
+        return $this->getIriFromResource($item);
+    }
+
+    /**
+     * Generate the IRI of a resource item.
+     */
+    protected function getIriFromResource(object $resource): ?string
+    {
         /** @var IriConverterInterface $iriConverter */
-        $iriConverter = $container->get('api_platform.iri_converter');
+        $iriConverter = static::getContainer()->get('api_platform.iri_converter');
 
-        return $iriConverter->getIriFromResource($item);
+        return $iriConverter->getIriFromResource($resource);
     }
 }