setParameter('kernel.debug', true); $extension = new FOSElasticaExtension(); $extension->load($config, $containerBuilder); $this->assertTrue($containerBuilder->hasDefinition('fos_elastica.object_persister.test_index.child_field')); $persisterCallDefinition = $containerBuilder->getDefinition('fos_elastica.object_persister.test_index.child_field'); $arguments = $persisterCallDefinition->getArguments(); $arguments = $arguments['index_3']; $this->assertArrayHasKey('_parent', $arguments); $this->assertEquals('parent_field', $arguments['_parent']['type']); } }