Debug className issue

Foo.spec.js

import React from 'react';
import { render, mount, shallow } from 'enzyme';
import { Foo } from 'Foo';

describe.only('Test for Foo component', function () {
    it('can mount Foo component', function () {
        const wrap = mount(
            <Foo />
        );
        console.log(wrap.find('.someCustomClass').debug());
        expect(wrap.find('.someCustomClass')).to.have.length(1);
    });
});