Kakao 로그인(카카오 SDK · 서버 커스텀 토큰)과 LINE 로그인(Firebase OIDC) 연결 · SNS 연동 · 인증 취소 처리

2026-10-05 19:01:28 +09:00
parent f483e8d94b
commit c301f3a1db
23 changed files with 1179 additions and 53 deletions
@@ -0,0 +1,109 @@
+import 'package:cloud_functions/cloud_functions.dart';
+import 'package:fancake/core/firebase/firebase_boot.dart';
+import 'package:fancake/features/auth/auth.dart';
+import 'package:fancake/features/auth/firebase_account_linker.dart';
+import 'package:fancake/features/auth/social_providers.dart';
+import 'package:firebase_auth_mocks/firebase_auth_mocks.dart';
+import 'package:flutter/services.dart';
+import 'package:flutter_test/flutter_test.dart';
+
+/// 카카오 — SDK 로그인(주입) → 서버 교환(주입) → signInWithCustomToken 계약.
+/// 토큰 검증·기존 oidc.kakao 사용자 매핑은 서버 테스트(functions/test/auth_kakao.test.ts)가 본다.
+void main() {
+  setUp(() => FirebaseBoot.debugSetMode(FirebaseMode.live, reason: '카카오 테스트'));
+  tearDown(
+    () => FirebaseBoot.debugSetMode(FirebaseMode.mock, reason: '카카오 테스트 끝'),
+  );
+
+  final sent = <Map<String, dynamic>>[];
+  setUp(sent.clear);
+
+  KakaoSignInProvider kakao(
+    MockFirebaseAuth auth, {
+    Future<String> Function()? token,
+    Object? serverError,
+    String appKey = 'test-key',
+  }) => KakaoSignInProvider(
+    accessToken: token ?? () async => 'kakao-access',
+    exchange: (payload) async {
+      sent.add(payload);
+      if (serverError != null) throw serverError;
+      return {
+        'token': 'custom-token',
+        if (payload['link'] == true) 'linked': true,
+      };
+    },
+    firebaseAuth: auth,
+    nativeAppKey: appKey,
+  );
+
+  test('성공 — 카카오 토큰을 서버에 넘기고 커스텀 토큰으로 로그인한다', () async {
+    final auth = MockFirebaseAuth(mockUser: MockUser(uid: 'kakao:1'));
+    final outcome = await kakao(auth).signIn();
+    expect(sent.single, {'accessToken': 'kakao-access'});
+    expect((outcome as AuthSucceeded).account.uid, 'kakao:1');
+    expect(outcome.account.provider, AuthProviderKind.kakao);
+    expect(auth.currentUser?.uid, 'kakao:1');
+  });
+
+  test('앱 키가 없으면 SDK·서버를 부르지 않고 미설정', () async {
+    final outcome = await kakao(MockFirebaseAuth(), appKey: '').signIn();
+    expect(outcome, isA<AuthNotConfigured>());
+    expect(sent, isEmpty);
+  });
+
+  test('카카오 로그인 취소(CANCELED)는 취소 · 서버를 부르지 않는다', () async {
+    final outcome = await kakao(
+      MockFirebaseAuth(),
+      token: () async => throw PlatformException(code: 'CANCELED'),
+    ).signIn();
+    expect(outcome, isA<AuthCancelled>());
+    expect(sent, isEmpty);
+  });
+
+  test('서버 오류는 카탈로그 코드로 · 로그인하지 않는다', () async {
+    final auth = MockFirebaseAuth();
+    final outcome = await kakao(
+      auth,
+      serverError: FirebaseFunctionsException(
+        code: 'permission-denied',
+        message: '카카오 인증을 확인하지 못했습니다.',
+        details: {'code': 'E-AUTH-03'},
+      ),
+    ).signIn();
+    expect((outcome as AuthFailed).code, 'E-AUTH-03');
+    expect(auth.currentUser, isNull);
+  });
+
+  group('SNS 연동', () {
+    test('로그인한 사용자에 link: true 로 붙인다', () async {
+      final auth = MockFirebaseAuth(
+        signedIn: true,
+        mockUser: MockUser(uid: 'u-1'),
+      );
+      final linker = FirebaseAccountLinker(
+        providers: [kakao(auth)],
+        firebaseAuth: auth,
+      );
+      final outcome = await linker.link(AuthProviderKind.kakao);
+      expect(sent.single, {'accessToken': 'kakao-access', 'link': true});
+      expect((outcome as AuthSucceeded).account.uid, 'u-1');
+    });
+
+    test('다른 이메일이면 E-AUTH-08 · 이메일 안내 문구', () async {
+      final auth = MockFirebaseAuth(
+        signedIn: true,
+        mockUser: MockUser(uid: 'u-1'),
+      );
+      final outcome = await kakao(
+        auth,
+        serverError: FirebaseFunctionsException(
+          code: 'already-exists',
+          message: 'x',
+          details: {'code': 'E-AUTH-08', 'reason': 'different-email'},
+        ),
+      ).link(auth.currentUser!);
+      expect((outcome as AuthFailed).code, 'E-AUTH-08');
+    });
+  });
+}