creating the unread notification use case and the test

Rodrigo001-dev · Rodrigo001-dev · commit 27f93f725c65 · 2022-12-15T01:30:15.000-03:00
diff --git a/src/application/use-cases/unread-notification.spec.ts b/src/application/use-cases/unread-notification.spec.ts
@@ -0,0 +1,36 @@
+import { makeNotification } from '@test/factories/notification-factory';
+import { InMemoryNotificationsRepository } from '../../../test/repositories/in-memory-notifications-repository';
+import { NotificationNotFound } from './errors/notification-not-found';
+import { UnreadNotification } from './unread-notification';
+
+describe('Unread notification', () => {
+  it('should be able to unread a notification', async () => {
+    const notificationsRepository = new InMemoryNotificationsRepository();
+    const unreadNotification = new UnreadNotification(notificationsRepository);
+
+    // para eu conseguir marcar uma notificação como não lida, ela precisa estar
+    // como lida antes
+    const notification = makeNotification({
+      readAt: new Date(),
+    });
+
+    await notificationsRepository.create(notification);
+
+    await unreadNotification.execute({
+      notificationId: notification.id,
+    });
+
+    expect(notificationsRepository.notifications[0].readAt).toBeNull();
+  });
+
+  it('should not be able to unread a non existing notification', async () => {
+    const notificationsRepository = new InMemoryNotificationsRepository();
+    const unreadNotification = new UnreadNotification(notificationsRepository);
+
+    expect(() => {
+      return unreadNotification.execute({
+        notificationId: 'fake-notification-id',
+      }); // por conta de ser uma Promise, o rejects quer dizer que deu erro
+    }).rejects.toThrow(NotificationNotFound);
+  });
+});
diff --git a/src/application/use-cases/unread-notification.ts b/src/application/use-cases/unread-notification.ts
@@ -0,0 +1,33 @@
+import { Injectable } from '@nestjs/common';
+
+import { NotificationsRepository } from '../repositories/notifications-repository';
+import { NotificationNotFound } from './errors/notification-not-found';
+
+interface UnreadNotificationRequest {
+  notificationId: string;
+}
+
+type UnreadNotificationResponse = void;
+
+@Injectable()
+export class UnreadNotification {
+  constructor(private notificationsRepository: NotificationsRepository) {}
+
+  async execute(
+    request: UnreadNotificationRequest,
+  ): Promise<UnreadNotificationResponse> {
+    const { notificationId } = request;
+
+    const notification = await this.notificationsRepository.findById(
+      notificationId,
+    );
+
+    if (!notification) {
+      throw new NotificationNotFound();
+    }
+
+    notification.unread();
+
+    await this.notificationsRepository.save(notification);
+  }
+}
