How do I unit test a Vue 3 component using Jest?

How do I unit test a Vue 3 component using Jest?

To unit test a Vue 3 component with Jest, you need to set up your testing environment and write test cases using Vue Test Utils.

What is Vue Test Utils?

Vue Test Utils is the official library for testing Vue components. It provides utility functions to mount and interact with components.

Can you show me a simple example?

Sure! Here's a basic example:

import { mount } from '@vue/test-utils';
import MyComponent from '@/components/MyComponent.vue';

test('renders a message', () => {
  const wrapper = mount(MyComponent);
  expect(wrapper.text()).toContain('Hello World');
});

What should I do if my test fails?

If your test fails, check the error message for clues. It might be due to incorrect props, state, or a missing element in your component.