How can I effectively test Axios calls in Vue using mocks?

How can I effectively test Axios calls in Vue using mocks?

You can use libraries like Jest and Vue Test Utils to mock Axios calls in your Vue components. Would you like a code example?

Yes, please provide a code example for mocking Axios in a Vue component.

Sure! Here's a simple example:

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

jest.mock('axios');

describe('MyComponent', () => {
  it('fetches data from an API', async () => {
    const data = { data: { message: 'Hello World' } };
    axios.get.mockResolvedValue(data);

    const wrapper = shallowMount(MyComponent);
    await wrapper.vm.fetchData();

    expect(wrapper.vm.message).toBe('Hello World');
  });
});

This mocks the Axios GET request and tests if the component updates correctly.

What if I want to test error handling in my Axios calls?

You can simulate an error response by using mockRejectedValue. Here's how you can do it:

axios.get.mockRejectedValue(new Error('Network Error'));
const wrapper = shallowMount(MyComponent);
await wrapper.vm.fetchData();
expect(wrapper.vm.error).toBe('Network Error');

This will help you test how your component handles errors.