fix(sidenav): test

Author: devversion

src/components/sidenav/sidenav.spec.js

@@ -229,6 +229,8 @@ describe('mdSidenav', function() {
       var triggerElement = setupTrigger();
       var controller = sidenavElement.controller('mdSidenav');
 
+      triggerElement.focus();
+
       var event = document.createEvent("MouseEvent");
       event.initMouseEvent("mousedown", true, true, window, null, 0, 0, 0, 0, false, false, false, false, 0, null);
       triggerElement[0].dispatchEvent(event);