
PASS Document.prepend() without any argument, on a Document having no child. 
PASS Document.prepend() with only one element as an argument, on a Document having no child. 
PASS Document.append() with only one element as an argument, on a Document having one child. 
PASS Document.prepend() with text as an argument, on a Document having no child. 
PASS Document.prepend() with two elements as the argument, on a Document having no child.