如何在不实际发送电子邮件的情况下模拟javax.mail.Transport.send（）方法？

Question

Code for sending email:

    Properties properties = new Properties();
    properties.setProperty("mail.smtp.host", host);
    Session session = Session.getInstance(properties);
    MimeMessage message = new MimeMessage(session);
    message.setFrom(new InternetAddress(from));

    message.setRecipient(RecipientType.TO, new InternetAddress(to));
    message.setSubject(subject);
    message.setText(content);
    session.setDebug(true);

    Transport.send(message);

I would like to test whether I am sending email correctly in mock way. Please help!

Answer 1

Here is an example test, using JMockit:

@Test
public void checkEmailIsSent(@Mocked Transport emailTransport) {
    // Call the code under test which sends email.

    new Verifications() {{
        Message msg;
        Transport.send(msg = withCapture());
        // perform regular asserts on the captured msg
    }};
}