Question

我正在尝试模拟发送电子邮件（出于JUnit，v4.8.1，测试的目的）并决定使用Dumbster，我通过SO找到它。我正在使用1.6版本。我在JUnit测试中有这个...

    SimpleSmtpServer server = SimpleSmtpServer.start();
    boolean ret = m_emailSvc.sendEmail("me@me.com", 
                                       "you@you.com", 
                                       "localhost", 
                                       "Test", 
                                       "Test Body");
    Assert.assertTrue(ret);
    server.stop();

我以这种方式发送电子邮件......

public boolean sendEmail(final String toEmail,
                      final String fromEmail,
                      final String smtpHost,
                      final String subject,
                      final String body)
{

    boolean ret = true;
    // Get system properties
    Properties properties = System.getProperties();

    // Setup mail server
    properties.setProperty("mail.smtp.host", smtpHost);

    // Get the default Session object.
    Session session = Session.getDefaultInstance(properties);

    try{
       // Create a default MimeMessage object.
       MimeMessage message = new MimeMessage(session);

       // Set From: header field of the header.
       message.setFrom(new InternetAddress(fromEmail));

       // Set To: header field of the header.
       message.addRecipient(Message.RecipientType.TO,
                                new InternetAddress(toEmail));

       // Set Subject: header field
       message.setSubject(subject);

       // Now set the actual message
       message.setText(body);

       // Send message
       Transport.send(message);
    }catch (MessagingException mex) {
       ret = false;
       LOG.error(mex.getMessage(), mex);
    }   // try
    return ret;
}   // sendEmail

此操作失败，但下面有例外。有谁知道我做错了什么，或者有更简单的方法来模拟在JUnit测试中发送电子邮件？

java.net.BindException: Permission denied
    at java.net.PlainSocketImpl.socketBind(Native Method)
    at java.net.PlainSocketImpl.socketBind(PlainSocketImpl.java:521)
    at java.net.PlainSocketImpl.bind(PlainSocketImpl.java:414)
    at java.net.ServerSocket.bind(ServerSocket.java:326)
    at java.net.ServerSocket.<init>(ServerSocket.java:192)
    at java.net.ServerSocket.<init>(ServerSocket.java:104)
    at com.dumbster.smtp.SimpleSmtpServer.run(Unknown Source)
    at java.lang.Thread.run(Thread.java:680)
[ERROR]: org.mainco.subco.email.service.EmailServiceImpl - Could not connect to SMTP host: localhost, port: 25
javax.mail.MessagingException: Could not connect to SMTP host: localhost, port: 25;

嵌套异常是： java.net.ConnectException：连接被拒绝 at com.sun.mail.smtp.SMTPTransport.openServer（SMTPTransport.java:1934） at com.sun.mail.smtp.SMTPTransport.protocolConnect（SMTPTransport.java:638）在javax.mail.Service.connect（Service.java:295）在javax.mail.Service.connect（Service.java:176）在javax.mail.Service.connect（Service.java:125）在javax.mail.Transport.send0（Transport.java:194）在javax.mail.Transport.send（Transport.java:124）在org.mainco.subco.email.service.EmailServiceImpl.sendEmail（EmailServiceImpl.java:62）在org.mainco.subco.email.service.EmailServiceTest.testSendEmail（EmailServiceTest.java:23） at sun.reflect.NativeMethodAccessorImpl.invoke0（Native Method） at sun.reflect.NativeMethodAccessorImpl.invoke（NativeMethodAccessorImpl.java:39） at sun.reflect.DelegatingMethodAccessorImpl.invoke（DelegatingMethodAccessorImpl.java:25）在java.lang.reflect.Method.invoke（Method.java:597）在org.junit.runners.model.FrameworkMethod $ 1.runReflectiveCall（FrameworkMethod.java:44）在org.junit.internal.runners.model.ReflectiveCallable.run（ReflectiveCallable.java:15）在org.junit.runners.model.FrameworkMethod.invokeExplosively（FrameworkMethod.java:41）在org.junit.internal.runners.statements.InvokeMethod.evaluate（InvokeMethod.java:20）在org.junit.runners.BlockJUnit4ClassRunner.runNotIgnored（BlockJUnit4ClassRunner.java:79）在org.junit.runners.BlockJUnit4ClassRunner.runChild（BlockJUnit4ClassRunner.java:71）在org.junit.runners.BlockJUnit4ClassRunner.runChild（BlockJUnit4ClassRunner.java:49）在org.junit.runners.ParentRunner $ 3.run（ParentRunner.java:193）在org.junit.runners.ParentRunner $ 1.schedule（ParentRunner.java:52）在org.junit.runners.ParentRunner.runChildren（ParentRunner.java:191）在org.junit.runners.ParentRunner.access $ 000（ParentRunner.java:42）在org.junit.runners.ParentRunner $ 2.evaluate（ParentRunner.java:184）在org.junit.runners.ParentRunner.run（ParentRunner.java:236）在org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run（JUnit4TestReference.java:50）在org.eclipse.jdt.internal.junit.runner.TestExecution.run（TestExecution.java:38）在org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests（RemoteTestRunner.java:467）在org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests（RemoteTestRunner.java:683）在org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run（RemoteTestRunner.java:390）在org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main（RemoteTestRunner.java:197）引起：java.net.ConnectException：连接被拒绝 at java.net.PlainSocketImpl.socketConnect（Native Method）在java.net.PlainSocketImpl.doConnect（PlainSocketImpl.java:382）在java.net.PlainSocketImpl.connectToAddress（PlainSocketImpl.java:241）在java.net.PlainSocketImpl.connect（PlainSocketImpl.java:228）在java.net.SocksSocketImpl.connect（SocksSocketImpl.java:384）在java.net.Socket.connect（Socket.java:527）在java.net.Socket.connect（Socket.java:476） at com.sun.mail.util.SocketFetcher.createSocket（SocketFetcher.java:288） at com.sun.mail.util.SocketFetcher.getSocket（SocketFetcher.java:231）在com.sun.mail.smtp.SMTPTransport.openServer（SMTPTransport.java:1900）

Answer 1

我决定使用PowerMock（v.1.5.1）来模拟来自Transport类的静态调用。

@RunWith(PowerMockRunner.class)
public class EmailServiceTest
{

@Autowired
private EmailService m_emailSvc = new EmailServiceImpl();

@Test
@PrepareForTest( Transport.class )
public final void testSendEmail()
{
    suppress(methodsDeclaredIn(Transport.class));
    boolean ret = m_emailSvc.sendEmail("me@me.com",
                                       "you@you.com", 
                                       "localhost",
                                       "Test",
                                       "Test Body");
    Assert.assertTrue(ret);
}   // testSendEmail

Answer 2

将调用包装到Transport怎么样是一个可模拟的对象？注入模拟并验证调用。

我的意思是这样的......

class MyTransport{
    public void send(MimeMessage message){
        Transport.send(message);
    }
}

然后将此类的实例注入上面的类中。在您的生产环境中，您拥有相同的代码。但是，在进行测试时，您可以传入MyTransport的模拟，从而在不需要服务器的情况下验证对send的调用。

无法使用JUnit模拟电子邮件服务器

2 个答案: