validateRecipientData example

static::assertInstanceOf(StorefrontResponse::class, $response);
        static::assertSame(200, $response->getStatusCode());

        $repo = $this->getContainer()->get('newsletter_recipient.repository');

        $criteria = new Criteria();
        $criteria->addFilter(new EqualsFilter('email', 'nltest@example.com'));
        /** @var NewsletterRecipientEntity $recipientEntry */
        $recipientEntry = $repo->search($criteria, Context::createDefaultContext())->first();

        static::assertEquals('direct', (string) $recipientEntry->getStatus());
        $this->validateRecipientData($recipientEntry);
    }

    public function testRegisterNewsletterForCustomerDoi(): void
    {
        $systemConfigService = $this->getContainer()->get(SystemConfigService::class);
        static::assertNotNull($systemConfigService);
        $systemConfigService->set('core.newsletter.doubleOptInRegistered', true);

        $browser = $this->login();
        $data = [
            'option' => 'subscribe',
        ];