getSetGroupPackagers example

$packager],
            [$sorter],
        );

        $this->promotionActionController = new PromotionActionController(
            $serviceRegistry
        );
    }

    public function testSetGroupPackager(): void
    {
        $response = $this->promotionActionController->getSetGroupPackagers();

        $content = $response->getContent();
        static::assertNotFalse($content);

        $json = \json_decode($content, null, 512, \JSON_THROW_ON_ERROR);
        static::assertIsArray($json);

        static::assertCount(1, $json);
        static::assertContains('test-packager', $json);
    }