tm_app/test/view_models/auth_view_model_logout_test.dart

import 'package:flutter_test/flutter_test.dart';
import 'package:tm_app/core/utils/result.dart';
import 'package:tm_app/view_models/auth_view_model.dart';

import '../fixtures/test_fixtures.dart';
import '../mocks/mock_auth_repository.dart';

void main() {
  group('AuthViewModel Logout', () {
    late MockAuthRepository mockRepository;
    late AuthViewModel authViewModel;

    setUp(() {
      mockRepository = MockAuthRepository();
      authViewModel = AuthViewModel(authRepository: mockRepository);
    });

    tearDown(() {
      authViewModel.dispose();
    });

    test('should logout successfully', () async {
      mockRepository.setLogoutResult(
        const Result.ok(TestFixtures.logoutResponse),
      );

      // Set a logged in user first
      authViewModel.usernameController.text = 'testuser';
      authViewModel.passwordController.text = 'testpass';
      mockRepository.setLoginResult(
        const Result.ok(TestFixtures.loginResponse),
      );
      await authViewModel.login();

      await authViewModel.logout();

      expect(authViewModel.loggedInUser, null);
      expect(authViewModel.errorMessage, null); // Cleared after notify
    });

    test('should handle logout error', () async {
      const errorMessage = 'Logout failed';
      mockRepository.setLogoutResult(Result.error(Exception(errorMessage)));

      await authViewModel.logout();

      expect(authViewModel.errorMessage, null); // Cleared after notify
    });

    test('should perform local logout', () async {
      mockRepository.setLogoutResult(
        const Result.ok(TestFixtures.logoutResponse),
      );

      // Set a logged in user first
      authViewModel.usernameController.text = 'testuser';
      authViewModel.passwordController.text = 'testpass';
      mockRepository.setLoginResult(
        const Result.ok(TestFixtures.loginResponse),
      );
      await authViewModel.login();

      await authViewModel.logout();

      expect(authViewModel.loggedInUser, null);
    });

    test('should clear error message before logout', () async {
      mockRepository.setLogoutResult(
        const Result.ok(TestFixtures.logoutResponse),
      );

      // Set an error first
      authViewModel.usernameController.text = 'testuser';
      authViewModel.passwordController.text = 'wrongpass';
      mockRepository.setLoginResult(Result.error(Exception('Login failed')));
      await authViewModel.login();

      await authViewModel.logout();

      expect(authViewModel.errorMessage, null);
    });
  });
}