React Jest test Cannot read property 'pathname' of undefined

Question

Not sure why I'm getting this error in my simple Main.test file.

The constructor of Main.js

export class Main extends Component {
    constructor(props) {
        super(props);

        this.state = {
            location: splitString(props.location.pathname, '/dashboard/')
        }

        if (R.isEmpty(props.view)) {
            isViewServices(this.state.location)
                ? this.props.gotoServicesView()
                : this.props.gotoUsersView()
        }
    }

Main.test

import React from 'react'
import * as enzyme from 'enzyme'
import toJson from 'enzyme-to-json'
import { Main } from './Main'
import Sidebar from '../../components/Common/sidebar'

const main = enzyme.shallow(<Main />);

describe('<Main /> component', () => {

  it('should render', () => {
    const tree = toJson(main);
    expect(tree).toMatchSnapshot();
  });

  it('contains the Sidebar', () => {
    expect(main.find(Sidebar).length).toBe(1);
  });
});

Is there a way to mock up the 'pathname'?

Answer 1

It seems you might have a few errors one being that in your test your not passing in any props.

And another from you accessing this.props in your constructor.

See your if statement but I'll put the fix here to be explicit

if (R.isEmpty(props.view)) {
   isViewServices(this.state.location)
     ? props.gotoServicesView()
     : props.gotoUsersView()
}

---

In Main.test

const location = { pathname: '/dashboard/' };
const main = enzyme.shallow(<Main location={ location }/>);