import 'package:flutter_test/flutter_test.dart';

import 'dart:async';

import 'package:hepan_everyday/features/school/school_page_adapter.dart';

void main() {
  test(
    'a rejected origin does not poison later legitimate page reading',
    () async {
      final reader = SchoolReader(SchoolPageAdapter());
      await expectLater(
        reader.read(
          Uri.parse('https://idas.uestc.edu.cn/authserver/login'),
          () async => 'x',
        ),
        throwsA(isA<UnsupportedSchoolLayout>()),
      );
      var reads = 0;
      await expectLater(
        reader.read(
          Uri.parse('https://yjsjy.uestc.edu.cn/pyxx/pygl/xskbcx/index/1'),
          () async {
            reads++;
            return 'unknown';
          },
        ),
        throwsA(isA<UnsupportedSchoolLayout>()),
      );
      expect(reads, 1);
    },
  );
  test('concurrent timetable reading obtains page content once', () async {
    final reader = SchoolReader(SchoolPageAdapter());
    final body = Completer<String>();
    var reads = 0;
    Future<String> getHtml() {
      reads++;
      return body.future;
    }

    final target = Uri.parse(
      'https://yjsjy.uestc.edu.cn/pyxx/pygl/xskbcx/index/1',
    );
    final a = reader.read(target, getHtml), b = reader.read(target, getHtml);
    final checks = Future.wait([
      expectLater(a, throwsA(isA<UnsupportedSchoolLayout>())),
      expectLater(b, throwsA(isA<UnsupportedSchoolLayout>())),
    ]);
    body.complete('unknown');
    await checks;
    expect(reads, 1);
  });
  test('unknown school markup never becomes an empty successful import', () {
    final adapter = SchoolPageAdapter();
    final target = Uri.parse(
      'https://yjsjy.uestc.edu.cn/pyxx/pygl/xskbcx/index/1',
    );
    for (final html in [
      '',
      '<html>验证码</html>',
      '<table><tr><td>课程名称</td></tr></table>',
    ]) {
      expect(
        () => adapter.extract(html, target),
        throwsA(isA<UnsupportedSchoolLayout>()),
      );
    }
  });
}