1 This tests that the scroll should be happened on moving the focus to out of visible area by tabbing.
3 On success, you will see a series of "PASS" messages, followed by "TEST COMPLETE".
6 PASS document.activeElement.id is 'tab1'
7 PASS document.activeElement.id is 'tab2'
8 PASS document.activeElement.id is 'tab3'
9 PASS document.activeElement.id is 'tab4'
10 PASS document.body.clientHeight is document.scrollingElement.scrollHeight - window.scrollY
11 PASS successfullyParsed is true