
PASS document.open() removes the document's children (fully active document) 
PASS document.open() removes the document's children (active but not fully active document) 
PASS document.open() removes the document's children (non-active document with an associated Window object; frame is removed) 
PASS document.open() removes the document's children (non-active document with an associated Window object; navigated away) 
PASS document.open() removes the document's children (non-active document without an associated Window object; createHTMLDocument) 
PASS document.open() removes the document's children (non-active document without an associated Window object; DOMParser) 
PASS document.open() removes the document's children (non-active document without an associated Window object; XMLHttpRequest)