title: SuperTest's expect vs. Chai.expect
body: <p>I'm confused, so if I use <a href="https://github.com/visionmedia/supertest" rel="noreferrer">SuperTest</a> which apparently looks like it has its own expect assertion, then I don't need to worry about using Chai?  Or when I require Chai, Supertest knows about it and is using it as the expect mechanism?</p>