Java 如何测试它。ozimov.springboot电子邮件？

我想使用

it.ozimov.springboot.mail.service.EmailService

对发送消息进行单元测试。 这是我的邮件服务：

import com.google.common.collect.Lists;
import it.ozimov.springboot.mail.model.Email;
import it.ozimov.springboot.mail.model.defaultimpl.DefaultEmail;
import it.ozimov.springboot.mail.service.EmailService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.stereotype.Service;

import javax.mail.internet.AddressException;
import javax.mail.internet.InternetAddress;
import java.io.UnsupportedEncodingException;

@Service
public class MailService {
    @Autowired
    public EmailService emailService;

    @Value("${spring.mail.username}")
    private String username;

    public void sendMail(String subject, String messageContent, String recipient) 
            throws UnsupportedEncodingException, AddressException {
        final Email email = DefaultEmail.builder()
                .from(new InternetAddress(username))
                .to(Lists.newArrayList(new InternetAddress(recipient)))
                .subject(subject)
                .body(messageContent)
                .encoding("UTF-8").build();
        emailService.send(email);
    }
}

我用绿信做了一个测试，但它不起作用：

@RunWith(SpringJUnit4ClassRunner.class)
public class MailServiceTest {
    private static final String USER_PASSWORD = "abcdef123";
    private static final String USER_NAME = "hascode";
    private static final String EMAIL_USER_ADDRESS = "hascode@localhost";
    private static final String EMAIL_TO = "someone@localhost.com";
    private static final String EMAIL_SUBJECT = "Test E-Mail";
    private static final String EMAIL_TEXT = "This is a test e-mail.";
    private static final String LOCALHOST = "127.0.0.1";
    private GreenMail mailServer;

    @InjectMocks
    private MailService mailService = new MailService();

    @Mock
    private EmailService emailService;

    @Before
    public void setUp() {
        MockitoAnnotations.initMocks(this);
        mailServer = new GreenMail(ServerSetupTest.SMTP);
        mailServer.start();
        mailServer.setUser(EMAIL_USER_ADDRESS, USER_NAME, USER_PASSWORD);
    }

    @After
    public void tearDown() {
        mailServer.stop();
    }

    @Test
    public void getMails() throws IOException, MessagingException,
            UserException, InterruptedException {
        String subject = "Some subject";
        String body = "Some contents.";
        String recipient = "test@test.com";

        ReflectionTestUtils.setField(mailService, "username", "bla");
        mailService.sendMail(subject, body, recipient);

        MimeMessage[] messages = mailServer.getReceivedMessages();
        assertNotNull(messages);
        assertEquals(1, messages.length);
        MimeMessage m = messages[0];
        assertEquals(EMAIL_SUBJECT, m.getSubject());
        assertTrue(String.valueOf(m.getContent()).contains(EMAIL_TEXT));
        assertEquals(EMAIL_TO, m.getFrom()[0].toString());
    }
}

结果我得到了这个：

java.lang.AssertionError: 
Expected :1
Actual   :0

---

也许有人知道我做错了什么？因为MailService在controller中工作（它发送电子邮件），但测试不起作用。

问题在于，您将单元测试与模拟的EmailService一起使用，以支持集成测试

如果你查看一下使用过的库，你会发现不同之处。例如，调查