| foobarbaz | |
| Success: window.getSelection() is ar. | |
| Success: s.extend(span2.firstChild, 4) raised IndexSizeError: The index is not in the allowed range.. | |
| Success: s.extend(span2.firstChild, -1) raised IndexSizeError: The index is not in the allowed range.. | |
| Success: window.getSelection() is b. | |
| Success: window.getSelection() is arbaz. | |
| Success: s.extend() raised TypeError: Not enough arguments. | |
| Success: s.extend(null, 0) raised TypeError: Argument 1 ('node') to Selection.extend must be an instance of Node. |