@testing-library/vue: montering af komponenter

npm install -D @testing-library/vue @testing-library/user-event @testing-library/jest-dom
# Also install vitest for a Vite project:
npm install -D vitest jsdom

import { render, screen } from '@testing-library/vue';
import Button from './Button.vue';

test('renders button label', () => {
  render(Button, { props: { label: 'Submit' } });
  expect(screen.getByRole('button', { name: 'Submit' })).toBeInTheDocument();
});

render(UserCard, {
  props: {
    user: { id: 1, name: 'Alice', email: 'alice@example.com' }
  }
});

import { createPinia } from 'pinia';
import router from './router';

render(App, {
  global: {
    plugins: [createPinia(), router],
    provide: { theme: 'dark' }
  }
});

// test-utils.ts
import { render } from '@testing-library/vue';
import { createPinia } from 'pinia';

export function renderWithSetup(component: any, options = {}) {
  return render(component, {
    global: { plugins: [createPinia()] },
    ...options
  });
}

import userEvent from '@testing-library/user-event';

test('emits submit on form submit', async () => {
  const user = userEvent.setup();
  const { emitted } = render(LoginForm);

  await user.type(screen.getByLabelText('Email'), 'alice@example.com');
  await user.click(screen.getByRole('button', { name: /login/i }));

  expect(emitted().submit[0]).toEqual([{ email: 'alice@example.com' }]);
});

render(Card, {
  slots: {
    default: '<p>Card body content</p>',
    header: '<h2>My Card Title</h2>'
  }
});

expect(screen.getByText('Card body content')).toBeInTheDocument();

const pinia = createPinia();
render(Counter, { global: { plugins: [pinia] } });

const store = useCounterStore();
store.count = 5; // set initial state
await nextTick();

expect(screen.getByText('5')).toBeInTheDocument();

import { nextTick } from 'vue';

await user.click(button);
await nextTick();
expect(screen.getByText('Updated!')).toBeInTheDocument();