patchFs.md
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	# `patchFs(vol[, fs])`

	Rewrites Node's filesystem module `fs` with fs-like object.

	- `vol` - fs-like object
	- `fs` (optional) - a filesystem to patch, defaults to `require('fs')`

	```js
	import {patchFs} from 'fs-monkey';

	const myfs = {
	readFileSync: () => 'hello world',
	};

	patchFs(myfs);
	console.log(require('fs').readFileSync('/foo/bar')); // hello world
	```

	You don't need to create fs-like objects yourself, use [`memfs`](https://github.com/streamich/memfs)
	to create a virtual filesystem for you:

	```js
	import {vol} from 'memfs';
	import {patchFs} from 'fs-monkey';

	vol.fromJSON({'/dir/foo': 'bar'});
	patchFs(vol);
	console.log(require('fs').readdirSync('/')); // [ 'dir' ]
	```