water-management-system/test/auth_service_test.dart

import 'package:flutter_test/flutter_test.dart';
import 'package:shared_preferences/shared_preferences.dart';
import 'package:water_management_system/services/auth_service.dart';

void main() {
  group('AuthService', () {
    late AuthService authService;
    setUp(() {
      SharedPreferences.setMockInitialValues({});
      authService = AuthService();
    });

    test('initial state should not be authenticated', () {
      expect(authService.isAuthenticated, false);
      expect(authService.token, null);
      expect(authService.isLoading, false);
    });

    test('login failure should keep not authenticated', () async {
      final result = await authService.login('invalid', 'wrong');
      expect(result, false);
      expect(authService.isAuthenticated, false);
    });

    test('logout should clear auth data', () async {
      await authService.logout();
      expect(authService.isAuthenticated, false);
      expect(authService.token, null);
    });

    test('isLoading should be false after operation', () async {
      await authService.login('test', 'test');
      expect(authService.isLoading, false);
    });
  });
}