
PASS sending a plain empty object
PASS sending the ES Math object
PASS sending a new XHR instance
PASS sending a new ReadableStream instance
PASS sending object that stringifies to undefined
PASS sending object that stringifies to null
PASS object that stringifies to query string
PASS object that stringifies to JSON string
PASS object whose valueOf() returns a document - ignore valueOf(), stringify
PASS object whose toString() returns a document, expected to throw
PASS object whose toString() throws, expected to throw