| PASS Construct a TreeWalker by document.createTreeWalker(root). | |
| PASS Construct a TreeWalker by document.createTreeWalker(root, null, null). | |
| PASS Construct a TreeWalker by document.createTreeWalker(root, undefined, undefined). | |
| PASS Give an invalid root node to document.createTreeWalker(). | |
| PASS Walk over nodes. | |
| PASS Optional arguments to createTreeWalker should be optional (3 passed, null). | |
| This test checks the basic functionality of TreeWalker. |