feat: test extension

src/test/java/org/otherband/email/smtp/SMTPEmailServiceTest.java

@@ -2,29 +2,48 @@
 
 import org.junit.jupiter.api.BeforeEach;
 import org.junit.jupiter.api.Test;
-import org.mockito.Mockito;
+import org.mockito.ArgumentCaptor;
 import org.otherband.email.VerificationLinkEmailRequest;
 import org.springframework.mail.SimpleMailMessage;
 import org.springframework.mail.javamail.JavaMailSender;
 
-import static org.mockito.Mockito.*;
+import static org.junit.jupiter.api.Assertions.*;
+import static org.mockito.Mockito.mock;
+import static org.mockito.Mockito.verify;
 
 class SMTPEmailServiceTest  {
+    private static final String EXPECTED_ID = "LETTER_ID";
+    public static final String EXPECTED_EMAIL = "[email protected]";
+    public static final String TOKEN_ID = "TOKEN_ID";
+    public static final String SECRET = "SECRET";
     private SMTPEmailService service;
-    private String mailUserName;
+    private final static String SENDER_EMAIL = "[email protected]";
     private JavaMailSender mailSender;
 
     @BeforeEach
     void setup() {
-        mailUserName = "test";
         mailSender = mock(JavaMailSender.class);
-        service = new SMTPEmailService(mailUserName, mailSender);
+        service = new SMTPEmailService(SENDER_EMAIL, mailSender);
     }
 
     @Test
     void testSendVerificationEmail() {
-        VerificationLinkEmailRequest verificationLinkEmailRequest = new VerificationLinkEmailRequest();
+        VerificationLinkEmailRequest verificationLinkEmailRequest = buildRequest();
         service.sendLetterVerificationLink(verificationLinkEmailRequest);
-        verify(mailSender).send(Mockito.any(SimpleMailMessage.class));
+        ArgumentCaptor<SimpleMailMessage> argumentCaptor = ArgumentCaptor.forClass(SimpleMailMessage.class);
+        verify(mailSender).send(argumentCaptor.capture());
+        SimpleMailMessage sentMessage = argumentCaptor.getValue();
+        assertArrayEquals(new String[]{EXPECTED_EMAIL}, sentMessage.getTo());
+        assertEquals("Recommendation letter verification link", sentMessage.getSubject());
+        assertTrue(sentMessage.getText().contains("/api/v1/recommendation-letter/verify/LETTER_ID/TOKEN_ID/SECRET"));
+    }
+
+    private static VerificationLinkEmailRequest buildRequest() {
+        VerificationLinkEmailRequest request = new VerificationLinkEmailRequest();
+        request.setLetterId(EXPECTED_ID);
+        request.setTokenId(TOKEN_ID);
+        request.setSecretToken(SECRET);
+        request.setReceiverEmail(EXPECTED_EMAIL);
+        return request;
     }
 }