Mailer 测试失败，在 null 上调用成员函数 getSubject()

Question

在 Symfony 5.0.2 项目中，新 Mailer 的测试失败并显示

Error: Call to a member function getSubject() on null

电子邮件 service and test 基于 symfonycast 教程。

在$email = ...;之后立即在服务中添加var_dump($email);显示object(Symfony\Bridge\Twig\Mime\TemplatedEmail)#24 (11) {...，这表示在服务中创建了一个真实的对象。

services.yaml:

    App\Services\EmailerService:
        $mailer: '@mailer'
        $senderAddress: '%app.sender_address%'

服务：

use Symfony\Bridge\Twig\Mime\TemplatedEmail;

class EmailerService
{
    private $mailer;
    private $sender;

    public function __construct($mailer, $senderAddress)
    {
        $this->mailer = $mailer;
        $this->sender = $senderAddress;
    }

    public function appMailer($mailParams)
    {
        $email = (new TemplatedEmail())
                ->from($this->sender)
                ->to($mailParams['recipient'])
                ->subject($mailParams['subject'])
                ->htmlTemplate($mailParams['view'])
                ->context($mailParams['context']);
        $this->mailer->send($email);
    }
}

测试：

use App\Services\EmailerService;
use PHPUnit\Framework\TestCase;
use Symfony\Component\Mailer\MailerInterface;

class MailerTest extends TestCase
{
    public function testSimpleMessage()
    {
        $symfonyMailer = $this->createMock(MailerInterface::class);
        $symfonyMailer->expects($this->once())
                ->method('send');

        $mailer = new EmailerService($symfonyMailer, 'admin@bogus.info', 'admin@bogus.info');
        $mailParams = [
            'view' => 'Email/non_user_forgotten_password.html.twig',
            'context' => ['supportEmail' => 'admin@bogus.info'],
            'recipient' => 'bborko@bogus.info',
            'subject' => 'Test message',            
        ];
        $email = $mailer->appMailer($mailParams);

        $this->assertSame('Test message', $email->getSubject());
    }
}

Answer 1

appMailer() 必须 return 一个 TemplatedEmail 对象，这样你才能调用 getSubject()。目前它 return 什么都没有。将其更改为：

public function appMailer($mailParams)
{
    $email = (new TemplatedEmail())
            ->from($this->sender)
            ->to($mailParams['recipient'])
            ->subject($mailParams['subject'])
            ->htmlTemplate($mailParams['view'])
            ->context($mailParams['context']);
    $this->mailer->send($email);

    return $email; // I added this line. 
}

Mailer 测试失败，在 null 上调用成员函数 getSubject()

Mailer test fails with Call to a member function getSubject() on null

mailer

symfony