social-app/apps/test/widget_test.dart

import 'package:flutter/material.dart';
import 'package:flutter_test/flutter_test.dart';
import 'package:mocktail/mocktail.dart';
import 'package:social_app/main.dart';
import 'package:social_app/features/auth/presentation/bloc/auth_bloc.dart';
import 'package:social_app/features/auth/presentation/bloc/auth_state.dart';
import 'package:social_app/features/auth/data/auth_repository.dart';
import 'package:social_app/core/di/injection.dart';

class MockAuthBloc extends Mock implements AuthBloc {}

class MockAuthRepository extends Mock implements AuthRepository {}

class FakeAuthState extends Fake implements AuthState {}

void main() {
  setUpAll(() {
    registerFallbackValue(FakeAuthState());
  });

  setUp(() async {
    if (sl.isRegistered<AuthRepository>()) {
      await sl.reset();
    }
    sl.registerSingleton<AuthRepository>(MockAuthRepository());
  });

  testWidgets('Login screen loads correctly', (WidgetTester tester) async {
    final mockAuthBloc = MockAuthBloc();
    when(() => mockAuthBloc.state).thenReturn(AuthInitial());
    when(
      () => mockAuthBloc.stream,
    ).thenAnswer((_) => Stream.value(AuthInitial()));

    await tester.pumpWidget(LinksyApp(authBloc: mockAuthBloc));
    expect(find.text('linksy'), findsOneWidget);
    expect(find.text('登录'), findsOneWidget);
    expect(find.text('还没有账号？去注册'), findsOneWidget);
  });

  testWidgets('Main content is vertically centered above footer', (
    WidgetTester tester,
  ) async {
    final mockAuthBloc = MockAuthBloc();
    when(() => mockAuthBloc.state).thenReturn(AuthInitial());
    when(
      () => mockAuthBloc.stream,
    ).thenAnswer((_) => Stream.value(AuthInitial()));

    await tester.pumpWidget(LinksyApp(authBloc: mockAuthBloc));

    final safeAreaRect = tester.getRect(find.byType(SafeArea));
    final mainRect = tester.getRect(
      find.byKey(const Key('login_main_content')),
    );
    final footerRect = tester.getRect(find.byKey(const Key('login_footer')));

    final topSpace = mainRect.top - safeAreaRect.top;
    final bottomSpace = footerRect.top - mainRect.bottom;

    expect((topSpace - bottomSpace).abs(), lessThanOrEqualTo(2));
  });

  testWidgets('Login screen does not overflow when keyboard is visible', (
    WidgetTester tester,
  ) async {
    final mockAuthBloc = MockAuthBloc();
    when(() => mockAuthBloc.state).thenReturn(AuthInitial());
    when(
      () => mockAuthBloc.stream,
    ).thenAnswer((_) => Stream.value(AuthInitial()));

    await tester.pumpWidget(
      MediaQuery(
        data: const MediaQueryData(
          size: Size(390, 844),
          viewInsets: EdgeInsets.only(bottom: 320),
        ),
        child: LinksyApp(authBloc: mockAuthBloc),
      ),
    );
    await tester.pumpAndSettle();

    expect(tester.takeException(), isNull);
    expect(find.text('登录'), findsOneWidget);
  });
}