checkbox_spec.js

const React = require('react');
const TestUtils = React.addons.TestUtils;

const Checkbox = React.createClass({
    render() {
        return <input type="checkbox"></input>
    }
});

describe('Checkbox', function() {
    it('toggles its checked property on the DOM', function() {
        const cb = TestUtils.renderIntoDocument(<Checkbox />);
        const node = React.findDOMNode(cb);
        expect(node.checked).to.be.false;
        TestUtils.Simulate.click(node);
        expect(node.checked).to.be.true;
    })
})