feat: Add pm

toju-app/src/app/domains/direct-message/application/services/friend.service.spec.ts

@@ -0,0 +1,41 @@
+import { FriendRepository } from '../../infrastructure/friend.repository';
+
+describe('FriendService storage contract', () => {
+  let repository: FriendRepository;
+
+  beforeEach(() => {
+    installLocalStorageMock();
+    repository = new FriendRepository();
+  });
+
+  it('should add friend', async () => {
+    await repository.addFriend('alice', { userId: 'bob', addedAt: 10 });
+
+    expect(await repository.loadFriends('alice')).toEqual([{ userId: 'bob', addedAt: 10 }]);
+  });
+
+  it('should remove friend', async () => {
+    await repository.addFriend('alice', { userId: 'bob', addedAt: 10 });
+    await repository.removeFriend('alice', 'bob');
+
+    expect(await repository.loadFriends('alice')).toEqual([]);
+  });
+
+  it('should persist friends', async () => {
+    await repository.addFriend('alice', { userId: 'bob', addedAt: 10 });
+    const reloadedRepository = new FriendRepository();
+
+    expect(await reloadedRepository.loadFriends('alice')).toEqual([{ userId: 'bob', addedAt: 10 }]);
+  });
+});
+
+function installLocalStorageMock(): void {
+  const values = new Map<string, string>();
+
+  vi.stubGlobal('localStorage', {
+    getItem: (key: string) => values.get(key) ?? null,
+    setItem: (key: string, value: string) => values.set(key, value),
+    removeItem: (key: string) => values.delete(key),
+    clear: () => values.clear()
+  });
+}