How can I test asynchronous functions in Vue using vue-cli-plugin-testing-async-mocking?

How can I test asynchronous functions in Vue using vue-cli-plugin-testing-async-mocking?

You can use vue-cli-plugin-testing-async-mocking to mock asynchronous functions in your Vue components. This allows you to simulate API calls and test how your components behave with different responses.

Can you show me a code example of how to set this up?

Sure! First, install the plugin. Then, in your test file, you can mock the async function like this:

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

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

const wrapper = mount(MyComponent);
// Now you can test the component's behavior with the mocked data.

What if I want to test error handling?

You can simulate an error by modifying the mock to reject the promise. For example:

jest.mock('@/api/myApi', () => ({
  fetchData: jest.fn(() => Promise.reject(new Error('Network Error')))
}));

This way, you can test how your component handles errors.