This is using the [require interface](http://visionmedia.github.io/mocha/#require-interface) of mocha, since I don't expect completion to work at all with implicitly injected members in other styles. So:
```
var mocha = require('mocha');
mocha.describe
```
The type of `describe` is <unknown> when hovering, and of course there's no signature completion. Ditto for `before` etc.
```
var mocha = require('mocha');
mocha.describe
```
The type of `describe` is <unknown> when hovering, and of course there's no signature completion. Ditto for `before` etc.