Tests DOMAgent.querySelector and DOMAgent.querySelectorAll.
Running: testDocumentQuerySelector
node id: id1
Running: testDocumentQuerySelectorAll
node id: id1
node id: id2
node id: id3
node id: id4
node id: id5
node id: id6
Running: testQuerySelector
node id: id3
Running: testQuerySelectorAll
node id: id3
node id: id4
node id: id5
node id: id6