What are the best practices for testing Vue 3 components with Jest?

What are the best practices for testing Vue 3 components with Jest?

When testing Vue 3 components with Jest, it's important to follow best practices like using the Vue Test Utils library, writing clear and concise tests, and ensuring your tests are isolated.

Can you give me an example of a simple test case?

Sure! Here's a simple test case for a Vue component:

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!');
});

How do I mock dependencies in my tests?

You can mock dependencies using Jest's jest.mock() function. For example, if you have an API call in your component, you can mock it like this:

jest.mock('@/api/myApi', () => ({ fetchData: jest.fn(() => Promise.resolve({ data: [] })) }));

What should I do if my tests are flaky?

Flaky tests can be frustrating! To address them, ensure your tests are isolated, avoid relying on external state, and use async/await for asynchronous operations.