Style tweak

Author: mjackson

modules/__tests__/History-test.js

@@ -21,13 +21,11 @@ describe('History Mixin', function () {
   it('assigns the history to the component instance', function (done) {
     const history = createHistory('/')
 
-    function assertHistory() {
-      expect(this.history).toExist()
-    }
-
     const Component = React.createClass({
       mixins: [ History ],
-      componentWillMount: assertHistory,
+      componentWillMount() {
+        expect(this.history).toExist()
+      },
       render() { return null }
     })