Testing email sending via SMTP server using Wiser

pom.xml

<dependency>
    <groupId>org.subethamail</groupId>
    <artifactId>subethasmtp</artifactId>
    <version>3.1.7</version>
    <scope>test</scope>
</dependency>

SmtpTest.java

import org.junit.After;
import org.junit.AfterClass;
import org.junit.Before;
import org.junit.BeforeClass;
import org.junit.Test;
import org.subethamail.wiser.Wiser;

import static org.hamcrest.core.Is.is;
import static org.junit.Assert.assertThat;

public class SmtpTest {

    private Wiser wiser;

    @BeforeClass
    public void setup() {
        this.wiser = new Wiser();
        this.wiser.setPort(2500);
        this.wiser.setHostname("localhost");
        this.wiser.start();
    }

    @AfterClass
    public void teardown() {
        this.wiser.stop();
    }

    @Before
    public void beforeTest() {
        this.wiser.getMessages().clear();
    }

    @After
    public void afterTest() {
        this.wiser.getMessages().clear();
    }

    @Test
    public void testSendingViaSmtpServer() throws Exception {
        final String from = "fromaddress@somewhere.com";
        final String to = "someone@aomewhereelse.com";
        final String subject = "email subject";
        final String body = "email body";

        {
            // Send EMAIL using above properties
            // SMTP should be configured as:
            // HOST = localhost
            // PORT = 2500
        }

        assertThat(this.wiser.getMessages().size(), is(1));
        assertThat(this.wiser.getMessages().get(0).getEnvelopeSender(), is(from));
        assertThat(this.wiser.getMessages().get(0).getEnvelopeReceiver(), is(to));
        assertThat(this.wiser.getMessages().get(0).getMimeMessage().getSubject().trim(), is(subject));
        assertThat(this.wiser.getMessages().get(0).getMimeMessage().getContent().toString().trim(), is(body));
    }
}