remove empty-line and add callbacks to tests to make sure they wait f…

…or change event

test/vaadin-radio-group.html

@@ -497,7 +497,6 @@
       });
 
       describe('change event', () => {
-
         it('should fire on right/down', () => {
           vaadinRadioButtonList[1].focus();
           vaadinRadioButtonList[1].checked = true;
@@ -623,17 +622,19 @@
         animationFrameFlush(done);
       });
 
-      it('should value on the vaadin-radio-group is updated at the time when change is fired', () => {
+      it('should value on the vaadin-radio-group is updated at the time when change is fired', done => {
         vaadinRadioButtonGroup.addEventListener('change', e => {
           expect(vaadinRadioButtonGroup.value).to.equal(vaadinRadioButtonList[2].value);
+          done();
         });
         vaadinRadioButtonList[2].click();
       });
 
-      it('should change event on radio-group includes updated value', () => {
+      it('should change event on radio-group includes updated value', done => {
         vaadinRadioButtonGroup.addEventListener('change', e => {
           expect(e.target.textContent).to.equal(vaadinRadioButtonList[2].textContent);
           expect(e.currentTarget.value).to.equal(vaadinRadioButtonList[2].value);
+          done();
         });
         vaadinRadioButtonList[2].click();
       });