Adds documentation for mount tracking

README.md

@@ -59,6 +59,8 @@ import Adapter from 'enzyme-adapter-react-16';
 Enzyme.configure({ adapter: new Adapter() });
 ```
 
+See [the installation docs](/docs/installation/README.md) for more details on configuring `enzyme`.
+
 3rd Party Adapters
 =============
 

docs/api/mount.md

@@ -8,7 +8,7 @@ want to run your tests inside of a browser, the recommended approach to using `m
 on a library called [jsdom](https://github.com/tmpvar/jsdom) which is essentially a headless browser
 implemented completely in JS.
 
-**Note**: unlike shallow or static rendering, full rendering actually mounts the component in the DOM, which means that tests can affect each other if they are all using the same DOM. Keep that in mind while writing your tests and, if necessary, use [`.unmount()`](ReactWrapper/unmount.md) or something similar as cleanup.
+**Note**: unlike shallow or static rendering, full rendering actually mounts the component in the DOM, which means that tests can affect each other if they are all using the same DOM. Keep that in mind while writing your tests and, if necessary, use [`.unmount()`](ReactWrapper/unmount.md) or something similar as cleanup. You can also automate this via a lifecycle hook with [mount tracking](../installation/mount-tracking.md).
 
 ```jsx
 import { mount } from 'enzyme';

docs/installation/README.md

@@ -17,3 +17,5 @@ although neither library is a dependency of enzyme.
 {% include "./react-014.md" %}
 
 {% include "./react-013.md" %}
+
+{% include "./mount-tracking.md" %}

docs/installation/mount-tracking.md

@@ -0,0 +1,60 @@
+# Automatic mount tracking
+
+If you are wanting to use enzyme in a large-scale application, you may want to automate
+calls to `unmount()` via a lifecycle hook in your test environment, rather than at the
+individual test level. Enzyme allows for this as part of its configuration:
+
+ES6:
+```js
+// setup file
+import { configure } from 'enzyme';
+import Adapter from 'enzyme-adapter-react-16';
+
+configure({
+  adapter: new Adapter(),
+  enableMountTracking: true,
+});
+```
+
+```js
+// test file
+import { shallow, mount } from 'enzyme';
+
+const wrapper = mount(<Foo />);
+```
+
+```js
+// test file (in a lifecycle hook)
+import { unmountAllWrappers } from 'enzyme';
+
+unmountAllWrappers();
+```
+
+ES5:
+<!-- eslint no-var: 0 -->
+```js
+// setup file
+var enzyme = require('enzyme');
+var Adapter = require('enzyme-adapter-react-16');
+
+enzyme.configure({
+  adapter: new Adapter(),
+  enableMountTracking: true,
+});
+```
+
+<!-- eslint no-var: 0 -->
+```js
+// test file
+var enzyme = require('enzyme');
+
+var wrapper = enzyme.mount(<Foo />);
+```
+
+<!-- eslint no-var: 0 -->
+```js
+// test file (in a lifecycle hook)
+var enzyme = require('enzyme');
+
+enzyme.unmountAllWrappers();
+```