EmailNotifierTest.java

public class EmailNotifierTest {

    static final String TEST_BODY = "cuerpo de test";
    static final String TEST_SUBJECT = "asunto de test";

    final MailAdress alfredo = new MailAdress("[email protected]");
    final EmailNotifier emailNotifier = new EmailNotifier();

    @Test
    public void shouldSendOneEmailToTheGivenEmailAdress() throws Exception {
        Message aTestMessage = createATestMessage();

        emailNotifier.sendTo(alfredo, aTestMessage);
        assertThat(inboxOf(alfredo), hasOneEmailWithSubject(TEST_SUBJECT));
    }

    private Message createATestMessage() {
        Message aTestMessage = mock(Message.class);
        when(aTestMessage.subject()).thenReturn(TEST_SUBJECT);
        when(aTestMessage.body()).thenReturn(TEST_BODY);
        return aTestMessage;
    }

}