How to mock axios call within a method? - vue.js

Question

I am trying to mock an axios call within a vuejs method. Is this possible?
Here is my vue component (SomeObj):
methods:{
callAxiosMethod() {
const callApi= axios.create();
callApi.defaults.timeout = 10000;
callApi.get(mockedUrl)
.then(response => {
console.log('response is ' + response);
})
.catch(e => {});
}
}
Here is my spec.js
let mockData = {};
beforeEach(() => {
jest.spyOn(axios, 'get').mockReturnValue(Promise.resolve(mockData));
});
let wrapper = shallowMount(SomeObj, {
stubs: [], localVue, mocks: {
mockUrl: mockUrl,
$route: {
params: { testId: "123" }
}
}
});
it('is a Vue instance', () => {
expect(wrapper.isVueInstance()).toBeTruthy();
axios.get.mockResolvedValue(mockData);
wrapper.vm.callAxiosMethod();
})
When I looked at the coverage, the system says the callApi is not covered. Any idea on how I can mock the axios call within the function?

Answer 1

Your code calls axios.create so you need to mock that function to return a mock callApi object.
Here is a simplified working example:
code.js
import * as axios from 'axios';
const mockedUrl = 'http://mock-url';
export const callAxiosMethod = () => {
const callApi = axios.create();
callApi.defaults.timeout = 10000;
return callApi.get(mockedUrl); // <= return the Promise so it can be awaited
}
code.test.js
import { callAxiosMethod } from './code';
jest.mock('axios', () => ({
create: jest.fn().mockReturnValue({
defaults: {},
get: jest.fn().mockResolvedValue('mocked data')
})
}));
test('callAxiosMethod', async () => { // <= async test function
const response = await callAxiosMethod(); // <= await the Promise
expect(response).toBe('mocked data'); // Success!
});