Kakao·LINE 이메일 선택 수집 — 동의한 이메일만 저장 · 이메일 없이 제공자 식별값으로 가입·로그인

app/firebase/functions/test/account_email.test.ts

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+import { afterAll, afterEach, beforeAll, beforeEach, describe, expect, it, vi } from 'vitest';
+import { getAuth } from 'firebase-admin/auth';
+import { getFirestore } from 'firebase-admin/firestore';
+
+import { bootAdmin, shutdownAdmin } from './support.js';
+import { fnAuthOnCreate } from '../src/account/account.js';
+import { fnAuthKakao, kakaoUidOf } from '../src/account/kakao.js';
+
+/** 이메일 선택 수집 — 동의한 이메일만 남기고, 이메일이 없어도 가입 · 로그인된다. */
+
+const U = 'test-email-user';
+const KAKAO_ID = '555000111';
+const db = () => getFirestore();
+
+type KakaoReq = Parameters<typeof fnAuthKakao.run>[0];
+const onCreate = (uid: string, extra: Record<string, unknown> = {}) =>
+  (fnAuthOnCreate as unknown as { run: (u: unknown) => Promise<void> })
+    .run({ uid, email: undefined, displayName: undefined, photoURL: undefined, providerData: [], ...extra });
+
+function stubKakao(email?: string) {
+  vi.stubGlobal('fetch', vi.fn(async (url: string) => {
+    if (url.endsWith('/v1/user/access_token_info')) return Response.json({ id: Number(KAKAO_ID), app_id: 123 });
+    return Response.json({
+      id: Number(KAKAO_ID),
+      kakao_account: { profile: { nickname: '카카오' }, ...(email ? { email, is_email_valid: true, is_email_verified: true } : {}) },
+    });
+  }));
+}
+
+async function wipe() {
+  await getAuth().deleteUsers([U, kakaoUidOf(KAKAO_ID)]);
+  for (const uid of [U, kakaoUidOf(KAKAO_ID)]) await db().recursiveDelete(db().doc(`users/${uid}`));
+}
+
+beforeAll(() => {
+  if (!process.env.FIREBASE_AUTH_EMULATOR_HOST) throw new Error('FIREBASE_AUTH_EMULATOR_HOST 가 없습니다.');
+  process.env.KAKAO_APP_ID = '123';
+  bootAdmin();
+});
+afterAll(async () => { await wipe(); await shutdownAdmin(); });
+beforeEach(wipe);
+afterEach(() => { vi.unstubAllGlobals(); });
+
+describe('계정 생성 트리거', () => {
+  it('제공자 정보의 이메일을 쓰고 · 이미 쓴 값은 덮지 않는다', async () => {
+    await db().doc(`users/${U}`).set({ displayName: '먼저씀' });
+    await onCreate(U, { providerData: [{ providerId: 'oidc.line', email: 'line@fan.io' }] });
+    const user = (await db().doc(`users/${U}`).get()).data()!;
+    expect(user.displayName).toBe('먼저씀');
+    expect(user.email).toBe('line@fan.io');
+    expect(user.status).toBe('active');
+    expect((await db().doc(`users/${U}/wallet/main`).get()).get('activityBalance')).toBe(0);
+  });
+
+  it('이메일이 없으면 null 로 만든다', async () => {
+    await onCreate(U, { providerData: [{ providerId: 'oidc.line' }] });
+    expect((await db().doc(`users/${U}`).get()).get('email')).toBeNull();
+  });
+});
+
+describe('카카오 이메일', () => {
+  it('동의한 이메일만 사용자 문서에 남기고 · 없어도 로그인된다', async () => {
+    stubKakao();
+    const first = await fnAuthKakao.run({ data: { accessToken: 'good' } } as KakaoReq) as { token: string };
+    expect(first.token).toBeTruthy();
+    expect((await db().doc(`users/${kakaoUidOf(KAKAO_ID)}`).get()).get('email')).toBeUndefined();
+    stubKakao('fan@kakao.com');
+    await fnAuthKakao.run({ data: { accessToken: 'good' } } as KakaoReq);
+    expect((await db().doc(`users/${kakaoUidOf(KAKAO_ID)}`).get()).get('email')).toBe('fan@kakao.com');
+  });
+});