halkyon/packages/halkyon_app/test/look/look_store_test.dart

import 'dart:io';

import 'package:flutter_test/flutter_test.dart';
import 'package:halkyon_app/halkyon_app.dart';
import 'package:halkyon_app/testing.dart';
import 'package:material_ui/material_ui.dart';

void main() {
  late Directory folder;
  late File file;

  setUp(() {
    folder = Directory.systemTemp.createTempSync('look');
    file = File('${folder.path}/look.json');
  });
  tearDown(() => folder.deleteSync(recursive: true));

  test("the device's look before anything is kept", () async {
    expect(await FileLookStore(file).read(), const Look());
  });

  test('keeps the appearance and language for the next start', () async {
    const look = Look(appearance: Appearance.dark, language: 'de');
    await FileLookStore(file).write(look);

    expect(await FileLookStore(file).read(), look);

    await FileLookStore(file).write(const Look(appearance: Appearance.light));
    expect(
      await FileLookStore(file).read(),
      const Look(appearance: Appearance.light),
    );
  });

  test("a damaged file or an unknown value reads as the device's", () async {
    file.writeAsStringSync('{"appearance": "dark", ');
    expect(await FileLookStore(file).read(), const Look());

    file.writeAsStringSync('[1, 2]');
    expect(await FileLookStore(file).read(), const Look());

    file.writeAsStringSync('{"appearance": "sepia", "language": 7}');
    expect(await FileLookStore(file).read(), const Look());
  });

  test('a look means a theme mode and a locale', () {
    expect(const Look().themeMode, ThemeMode.system);
    expect(const Look().locale, isNull);
    expect(const Look(appearance: Appearance.dark).themeMode, ThemeMode.dark);
    expect(const Look(appearance: Appearance.light).themeMode, ThemeMode.light);
    expect(const Look(language: 'de').locale, const Locale('de'));
    expect(const Look(language: 'en-US').locale, const Locale('en', 'US'));
    expect(
      const Look(appearance: Appearance.dark, language: 'de').settings,
      (themeMode: ThemeMode.dark, locale: const Locale('de')),
    );
  });

  test('a choice applies at once and is kept', () async {
    final store = MemoryLookStore();
    final cubit = await LookCubit.open(store);
    addTearDown(cubit.close);

    await cubit.chooseAppearance(Appearance.dark);
    await cubit.chooseLanguage('de');

    expect(
      cubit.state,
      const Look(appearance: Appearance.dark, language: 'de'),
    );
    expect(store.look, cubit.state);

    await cubit.chooseLanguage(null);
    expect(store.look, const Look(appearance: Appearance.dark));
  });
}