Test ReactJSDOM cleans up globals

test/react-jsdom.js

@@ -7,6 +7,16 @@ test('ReactJSDOM is a object', t => {
 	t.is(typeof ReactJSDOM, 'object');
 });
 
+test('ReactJSDOM cleans up globals', t => {
+	global.window = 'foo';
+	global.document = 'bar';
+	ReactJSDOM.render(
+		React.createElement('div', {}, 'hi')
+	);
+	t.is(global.window, 'foo');
+	t.is(global.document, 'bar');
+});
+
 test('ReactJSDOM renders a React Component', t => {
 	const component = ReactJSDOM.render(
 		React.createElement('div', {}, 'hi')