import 'package:flutter/widgets.dart';
import 'package:flutter_test/flutter_test.dart';
import 'package:pangolin_vpn/core/responsive/form_factor.dart';

Future<FormFactor> _ffAt(WidgetTester tester, Size size) async {
  late FormFactor ff;
  tester.view.physicalSize = size;
  tester.view.devicePixelRatio = 1.0;
  addTearDown(tester.view.reset);
  await tester.pumpWidget(MediaQuery(
    data: MediaQueryData.fromView(tester.view),
    child: Builder(builder: (c) { ff = c.formFactor; return const SizedBox(); }),
  ));
  return ff;
}

void main() {
  // tablet 阈值 ≥900，对齐 iPad 设计源(横屏侧栏布局)。
  testWidgets('iPad 横屏(1024) → tablet', (t) async {
    expect(await _ffAt(t, const Size(1024, 768)), FormFactor.tablet);
  });
  testWidgets('iPad 12.9″ 竖屏(1024) → tablet', (t) async {
    expect(await _ffAt(t, const Size(1024, 1366)), FormFactor.tablet);
  });
  testWidgets('iPad 11″ 竖屏(834) → mobile(窄屏回落底 Tab)', (t) async {
    expect(await _ffAt(t, const Size(834, 1194)), FormFactor.mobile);
  });
  testWidgets('iPad 标准竖屏(768) → mobile', (t) async {
    expect(await _ffAt(t, const Size(768, 1024)), FormFactor.mobile);
  });
  testWidgets('断点边界:900 → tablet, 899 → mobile', (t) async {
    expect(await _ffAt(t, const Size(900, 1200)), FormFactor.tablet);
    expect(await _ffAt(t, const Size(899, 1200)), FormFactor.mobile);
  });
  testWidgets('iPhone(390) → mobile', (t) async {
    expect(await _ffAt(t, const Size(390, 844)), FormFactor.mobile);
  });
}