azu/promise-test-helper — pull request #1 by azu (2014-12-03 12:47:14+00:00)
Title: [WIP] enhance shouldRejected reason

Current:

```js
shouldRejected(this.fulfilledPromise).cath(function(error){});
// => "Expected promise to be rejected but it was fulfilled"
```

We don't know what's `this.fulfilledPromise` fulfilled **value**.

Proposal:

```js
shouldRejected(this.fulfilledPromise).cath(function(error){});
// => "Expected promise to be rejected but it was fulfilled: VALUE"
```