email domain tests

src/main/java/io/wkrzywiec/hexagonal/library/email/EmailFacade.java

@@ -15,8 +15,10 @@ public class EmailFacade implements SendReservationConfirmation {
 
     @Override
     public void handle(SendReservationConfirmationCommand sendReservationConfirmation) {
-        String bookTitle = database.getTitleByBookId(sendReservationConfirmation.getBookId());
-        String userEmailAddress = database.getUserEmailAddress(sendReservationConfirmation.getUserId());
+        String bookTitle = database
+                .getTitleByBookId(sendReservationConfirmation.getBookId());
+        String userEmailAddress = database
+                .getUserEmailAddress(sendReservationConfirmation.getUserId());
 
         Email email = EmailCreator.reservationEmail(
                 sendReservationConfirmation.getReservationId(),

src/test/java/io/wkrzywiec/hexagonal/library/email/EmailFacadeTest.java

@@ -0,0 +1,39 @@
+package io.wkrzywiec.hexagonal.library.email;
+
+import io.wkrzywiec.hexagonal.library.TestData;
+import io.wkrzywiec.hexagonal.library.email.model.SendReservationConfirmationCommand;
+import io.wkrzywiec.hexagonal.library.email.ports.outgoing.EmailSender;
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.DisplayName;
+import org.junit.jupiter.api.Test;
+
+import static org.junit.jupiter.api.Assertions.assertDoesNotThrow;
+
+public class EmailFacadeTest {
+
+    private EmailFacade facade;
+    private EmailSender emailSender;
+    private InMemoryLibraryDatabase database;
+
+
+    @BeforeEach
+    public void init() {
+        database = new InMemoryLibraryDatabase();
+        emailSender = new EmailSenderFake();
+        facade = new EmailFacade(emailSender, database);
+
+        database.bookTitles.put(1L, TestData.homoDeusBookTitle());
+        database.emailAddresses.put(1L, "john.doe@test.com");
+    }
+
+    @Test
+    @DisplayName("Prepare & send reservation confirmation email")
+    public void shouldPrepareAndSendReservationConfirmation(){
+        //given
+        SendReservationConfirmationCommand sendReservationConfirmationCommand
+                = new SendReservationConfirmationCommand(1L, 1L, 1L);
+
+        //when & then
+        assertDoesNotThrow(() -> facade.handle(sendReservationConfirmationCommand));
+    }
+}

src/test/java/io/wkrzywiec/hexagonal/library/email/EmailSenderFake.java

@@ -0,0 +1,12 @@
+package io.wkrzywiec.hexagonal.library.email;
+
+import io.wkrzywiec.hexagonal.library.email.model.Email;
+import io.wkrzywiec.hexagonal.library.email.ports.outgoing.EmailSender;
+
+public class EmailSenderFake implements EmailSender {
+
+    @Override
+    public void sendReservationConfirmationEmail(Email email) {
+
+    }
+}

src/test/java/io/wkrzywiec/hexagonal/library/email/InMemoryLibraryDatabase.java

@@ -0,0 +1,21 @@
+package io.wkrzywiec.hexagonal.library.email;
+
+import io.wkrzywiec.hexagonal.library.email.ports.outgoing.LibraryDatabase;
+
+import java.util.concurrent.ConcurrentHashMap;
+
+public class InMemoryLibraryDatabase implements LibraryDatabase {
+
+    ConcurrentHashMap<Long, String> bookTitles = new ConcurrentHashMap<>();
+    ConcurrentHashMap<Long, String> emailAddresses = new ConcurrentHashMap<>();
+
+    @Override
+    public String getTitleByBookId(Long bookId) {
+        return bookTitles.get(bookId);
+    }
+
+    @Override
+    public String getUserEmailAddress(Long userId) {
+        return emailAddresses.get(userId);
+    }
+}