Android Apple 로그인을 Firebase 웹 흐름(apple.com 제공자)으로 연결 · 설정 안내

app/test/auth_oidc_test.dart

@@ -42,6 +42,24 @@ void main() {
     expect(providers[AuthProviderKind.kakao], isA<KakaoSignInProvider>());
   });
 
+  test('Apple: Android 는 Firebase 웹 흐름(apple.com) · iOS 는 Apple SDK', () {
+    final android = AuthRepository().providers.firstWhere(
+      (p) => p.provider == AuthProviderKind.apple,
+    );
+    expect(android, isA<OidcSignInProvider>());
+    expect(
+      (android as OidcSignInProvider).authProvider.providerId,
+      'apple.com',
+    );
+    expect(android.missingConfig, isEmpty);
+    debugDefaultTargetPlatformOverride = TargetPlatform.iOS;
+    addTearDown(() => debugDefaultTargetPlatformOverride = null);
+    final ios = AuthRepository().providers.firstWhere(
+      (p) => p.provider == AuthProviderKind.apple,
+    );
+    expect(ios, isA<AppleSignInProvider>());
+  });
+
   test('Firebase 설정이 없으면 SDK 를 부르지 않고 미설정으로 닫는다', () async {
     FirebaseBoot.debugSetMode(FirebaseMode.mock, reason: '설정 없음');
     final outcome = await line(_ThrowingAuth('should-not-call')).signIn();