使用 Java 测试邮件是否发送成功

Question

我有一个发送邮件的邮件服务：

@Component
public class MailingServiceImpl implements MailingService{

    @Autowired
    JavaMailSenderImpl mailSender;

    @Override
    public void sendMail(String sender, String receiver, String subject, String content) {

        SimpleMailMessage message = new SimpleMailMessage();
        message.setFrom(sender);
        message.setTo(receiver);
        message.setSubject(subject);
        message.setText(content);
        mailSender.send(message);
    }
}

我正在为此写一个测试void sendMail(...)，我需要检查邮件是否发送成功。我发现 GreenMail 我目前正在尝试将其用于我的测试，代码如下：

public class MailingServiceImplTest {

    private MailingServiceImpl mailingServiceImpl;

    @Autowired
    private JavaMailSenderImpl mailSender;

    @PostConstruct
    public void testConnection() {
        try {
            mailSender.testConnection();
        } catch(MessagingException ex) {
            throw new IllegalStateException("[Warning] Mail server is not available. " + ex);
        }
    }

    @Rule
    public final GreenMailRule greenMail = new GreenMailRule(ServerSetupTest.SMTP);

    @Test
    public void testSendMail() throws IOException {
        GreenMailUtil.sendTextEmailTest(receiver, sender, subject, content);
        // GreenMailUtil.sendTextEmailTest(to, from, subject, body);  -- here I could use the GreenMailUtil sendTextEmailTest, but I need to use my void sendMail function
        MimeMessage[] emails = greenMail.getReceivedMessages();
//      assertEquals(1, emails.length);
    }

有什么想法可以测试我的方法吗？ GreenMail（像下面的example 'Using JUint (rule based setup)' section) isn't the only tool I tried, tried Dumbster (like example，但是sendMessage需要字符串作为参数，我不能通过我的方法。我做错了吗？帮助

编辑

我对 JavaMailSenderImpl 的设置：

    @Bean
    public JavaMailSenderImpl mailSenderService(MailingServiceImpl mailingServiceImplementation,
            @Value("${mail.host}") String host,
            @Value("${mail.port}") int port,
            @Value("${mail.username}") String username,
            @Value("${mail.password}") String password) {
        JavaMailSenderImpl mailSender = new JavaMailSenderImpl();
        mailSender.setHost(host);
        mailSender.setPort(port);
        mailSender.setUsername(username);
        mailSender.setPassword(password);
        return mailSender;
    }

最近在调试中发现 @Autowired MailingServiceImpl 是 null..但是为什么呢？不是很懂

Answer 1

Greenmail 等正在启动一个可以从您的应用程序访问的本地 MailService。我还没有使用它，所以不要按原样使用代码，但从我的角度来看，您的测试应该看起来像……。像这样：

@Autowired
private MailingServiceImpl mailingServiceImpl;

@Rule
public final GreenMailRule greenMail = new GreenMailRule(ServerSetupTest.SMTP);

@Test
public void testSendMail() throws IOException {
    mailingServiceImpl.sendMail("sender", "receiver", "subject", "content");
    MimeMessage[] emails = greenMail.getReceivedMessages();
    assertEquals(1, emails.length);
}

当然，您的 JavaMailSender 必须正确配置才能使用本地 GreenMail-SMTP 服务，当然您的 spring 测试设置必须正确（假设您要使用 spring） .

当使用 spring 启动时，这样的配置应该足够了：

spring.mail.host=localhost
spring.mail.port=3025 #Default port of greenmail?!

使用 Java 测试邮件是否发送成功

Test if the mail sent sucessfully using Java

java

testing

spring

unit-testing

greenmail