2 PASS rootNode attribute must be defined on Node interface
3 PASS rootNode attribute must return the context object when it does not have any parent
4 PASS rootNode attribute must return the parent node of the context object when the context object has a single ancestor not in a document
5 PASS rootNode attribute must return the document when a node is in document
6 PASS rootNode attribute must return a document fragment when a node is in the fragment