Try solving a TS kata and see the tests it uses. It seems you have to write this 2 lines first

/// <reference path="/runner/typings/main/ambient/mocha/index.d.ts" />
/// <reference path="/runner/typings/main/ambient/chai/index.d.ts" />

Then you can do this:

import {assert} from "chai";

And use assert.equal(actual, expected)
That is as far I can go with the TS test framework, hope it helps.

Other than approving my Crystal version ( :P ), you should just wait for more users to solve it and leave positive feed.

Random tests are still missing, but I will not open an issue for that.