GreenMailRule.java

package org.keycloak.testsuite;

import java.lang.Thread.UncaughtExceptionHandler;
import java.net.SocketException;

import javax.mail.internet.MimeMessage;

import org.junit.rules.ExternalResource;

import com.icegreen.greenmail.util.GreenMail;
import com.icegreen.greenmail.util.ServerSetup;

public class GreenMailRule extends ExternalResource {

    private GreenMail greenMail;

    @Override
    protected void before() throws Throwable {
        ServerSetup setup = new ServerSetup(3025, "localhost", "smtp");

        greenMail = new GreenMail(setup);
        greenMail.start();
    }

    @Override
    protected void after() {
        if (greenMail != null) {
            // Suppress error from GreenMail on shutdown
            Thread.setDefaultUncaughtExceptionHandler(new UncaughtExceptionHandler() {
                @Override
                public void uncaughtException(Thread t, Throwable e) {
                    if (!(e.getCause() instanceof SocketException && t.getClass().getName()
                            .equals("com.icegreen.greenmail.smtp.SmtpHandler"))) {
                        System.err.print("Exception in thread \"" + t.getName() + "\" ");
                        e.printStackTrace(System.err);
                    }
                }
            });

            greenMail.stop();
        }
    }

    public MimeMessage[] getReceivedMessages() {
        return greenMail.getReceivedMessages();
    }

}