unexpected-set/documentation/index.md

Add support to Unexpected for testing Set instances

---
template: default.ejs
theme: dark
title: Unexpected-set
repository: https://github.com/unexpectedjs/unexpected-set
---

Add support to [Unexpected](http://unexpected.js.org) for testing [Set](https://developer.mozilla.org/en/docs/Web/JavaScript/Reference/Global_Objects/Set) instances.

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```js
expect(new Set([1, 2, 3]), 'to satisfy', new Set([1, 2, 3, 4]));
```

```output
expected new Set([ 1, 2, 3 ]) to satisfy new Set([ 1, 2, 3, 4 ])

new Set([
  1,
  2,
  3
  // missing 4
])
```