1Test TreeWalker with skipping 2 3On success, you will see a series of "PASS" messages, followed by "TEST COMPLETE". 4 5 6 7Testing nextSibling 8PASS walker.firstChild(); walker.currentNode.id is 'B1' 9PASS walker.nextSibling(); walker.currentNode.id is 'B3' 10 11Testing previousSibling 12PASS walker.previousSibling(); walker.currentNode.id is 'B1' 13PASS successfullyParsed is true 14 15TEST COMPLETE 16 17