How can I test Vue.js router guards effectively?

How can I test Vue.js router guards effectively?

To test Vue.js router guards, you can use tools like Jest or Mocha along with Vue Test Utils. Start by mocking the router and the components.

What specific scenarios should I test for in router guards?

You should test scenarios like authentication checks, role-based access, and redirection logic to ensure guards behave as expected.

Can you provide a code example for testing a simple authentication guard?

Sure! Here's a basic example:

import { createRouter, createWebHistory } from 'vue-router';
import { mount } from '@vue/test-utils';

const router = createRouter({
  history: createWebHistory(),
  routes: [
    { path: '/protected', component: ProtectedComponent, beforeEnter: authGuard },
  ],
});

function authGuard(to, from, next) {
  const isAuthenticated = false; // Mock authentication
  if (isAuthenticated) {
    next();
  } else {
    next('/login');
  }
}

test('redirects to login if not authenticated', async () => {
  await router.push('/protected');
  expect(router.currentRoute.value.fullPath).toBe('/login');
});

What are some common mistakes to avoid when testing router guards?

Common mistakes include not mocking dependencies properly, failing to test all possible routes, and overlooking edge cases.