car-interface-android/test/theme_controller_test.dart

import 'package:cardash_launcher/core/theme/theme_controller.dart';
import 'package:cardash_launcher/core/theme/theme_preference.dart';
import 'package:cardash_launcher/data/repositories/settings_repository.dart';
import 'package:flutter_test/flutter_test.dart';
import 'package:shared_preferences/shared_preferences.dart';

void main() {
  TestWidgetsFlutterBinding.ensureInitialized();

  setUp(() {
    SharedPreferences.setMockInitialValues({});
  });

  test('defaults are automatic with a 19:00-07:00 night window', () async {
    final prefs = await SharedPreferences.getInstance();
    final repository = SettingsRepository(prefs);
    expect(repository.themePreference, ThemePreference.automatic);
    expect(repository.nightStartMinutes, 19 * 60);
    expect(repository.nightEndMinutes, 7 * 60);
  });

  test('explicit light and dark choices resolve immediately', () async {
    final prefs = await SharedPreferences.getInstance();
    final controller = ThemeController(SettingsRepository(prefs));
    addTearDown(controller.dispose);

    await controller.setPreference(ThemePreference.dark);
    expect(controller.isDark, isTrue);

    await controller.setPreference(ThemePreference.light);
    expect(controller.isDark, isFalse);

    await controller.setPreference(ThemePreference.automatic);
    expect(controller.isDark, isIn(<bool>[true, false]));
  });

  test('theme choices survive a new repository instance', () async {
    final prefs = await SharedPreferences.getInstance();
    final controller = ThemeController(SettingsRepository(prefs));
    await controller.setPreference(ThemePreference.dark);
    controller.dispose();

    final reloaded = ThemeController(SettingsRepository(prefs));
    addTearDown(reloaded.dispose);
    expect(reloaded.preference, ThemePreference.dark);
    expect(reloaded.isDark, isTrue);
  });
}