How to test mailing resource without using the rest API

[esteveavi]

Hi,

I am trying to test the following code:

`@ApplicationScoped
public class MailResource {

@Inject
Mailer mailer;

public void sendEmail() {
    mailer.send(Mail.withText("your-destination-email@quarkus.io", "Ahoy from Quarkus", "A simple email sent from a Quarkus application."));
}

}`

With the following test:

`@QuarkusTest
class MailerResourceTest {

private static final String TO = "foo@quarkus.io";

@Inject
MockMailbox mailbox;

@BeforeEach
void init() {
    mailbox.clear();
}

@Inject
MailResource mailResource;

@Test
void testMail() {
   mailResource.sendEmail();
   assertThat(mailbox.getTotalMessagesSent()).isEqualTo(1);
    // verify that it was sent
    List<Mail> sent = mailbox.getMessagesSentTo(TO);
    assertThat(sent).hasSize(1);
    Mail actual = sent.get(0);
    assertThat(actual.getHtml()).contains("Welcome on board foo!");
    assertThat(actual.getSubject()).isEqualTo("Ahoy foo!");

  
}

}`

The test ends with a KO.

Thank you.