import 'dart:async';

import 'package:flutter/material.dart';
import 'package:flutter_test/flutter_test.dart';
import 'package:hepan_everyday/app/tp_startup.dart';

void main() {
  testWidgets('waiting initialization does not replace the native launch', (
    tester,
  ) async {
    await tester.pumpWidget(const SizedBox());
    final ready = Completer<void>();
    var startupFinished = false;
    final startup = launchApplication(
      ready: ready.future,
      child: const MaterialApp(home: Text('已准备好课表')),
    ).then((_) => startupFinished = true);
    await tester.pump();
    expect(startupFinished, isFalse);
    expect(tester.binding.sendFramesToEngine, isTrue);
    expect(find.text('TPSchedule'), findsNothing);
    expect(find.text('已准备好课表'), findsNothing);
    ready.complete();
    await startup;
    await tester.pump();
    expect(find.text('已准备好课表'), findsOneWidget);
    expect(find.text('TPSchedule'), findsNothing);
    expect(tester.binding.sendFramesToEngine, isTrue);
  });

  testWidgets('cached startup and resume never insert an extra launch frame', (
    tester,
  ) async {
    final ready = Future<void>.value();
    await ready;
    await launchApplication(
      ready: ready,
      child: const MaterialApp(home: Text('保存的课表')),
    );
    await tester.pump();
    expect(find.text('保存的课表'), findsOneWidget);
    expect(find.text('TPSchedule'), findsNothing);
    tester.binding.handleAppLifecycleStateChanged(AppLifecycleState.paused);
    tester.binding.handleAppLifecycleStateChanged(AppLifecycleState.resumed);
    await tester.pump();
    expect(find.text('保存的课表'), findsOneWidget);
    expect(find.text('TPSchedule'), findsNothing);
  });

  testWidgets(
    'initialization errors still show the recovery UI on first frame',
    (tester) async {
      final ready = Completer<void>();
      final startup = launchApplication(
        ready: ready.future,
        child: const MaterialApp(home: Text('恢复保存文件')),
      );
      ready.completeError(StateError('storage failed'));
      await startup;
      await tester.pump();
      expect(find.text('恢复保存文件'), findsOneWidget);
      expect(tester.binding.sendFramesToEngine, isTrue);
      expect(tester.takeException(), isNull);
    },
  );
}