Does the environment have full property descriptor support? Handles IE 8’s broken defineProperty/gOPD.
```js var hasPropertyDescriptors = require(‘has-property-descriptors’); var assert = require(‘assert’);
assert.equal(hasPropertyDescriptors(), true); // will be false in IE 6-8, and ES5 engines
// Arrays can not have their length [[Defined]] in some engines
assert.equal(hasPropertyDescriptors.hasArrayLengthDefineBug(), false); // will be true in Firefox 4-22, and node v0.6
```
Simply clone the repo, npm install, and run npm test