Example with Wrapper, adding MemoryRouter

EditDatasource.spec.js

import React from 'react';
import { render, mount, shallow } from 'enzyme';
import EditDatasource from './EditDatasource';
import { MemoryRouter } from 'react-router-dom';

describe('tests for EditDatasource', function () {
  it.only('changes the datasource.type when a select button is clicked', function () {
    const wrap = mount(
      <MemoryRouter>
        <EditDatasource
            notify={notify}
            navigate={navigate}
            action={actionSetup()} />
      </MemoryRouter>
    );
    expect(wrap.state().datasource.type === 'datawarehouse').to.be.true;

    wrap.find('.manualUpload').simulate('click');

    expect(wrap.state().datasource.type === 'manual').to.be.true;
  });
});