1 Checks that attributes created setAttributeNS() don't cause two identical xmlns attributes to be serialized
3 On success, you will see a series of "PASS" messages, followed by "TEST COMPLETE".
6 PASS doc.documentElement.getAttributeNS("http://www.example.com", "attr") is "value"
7 PASS parsedDoc.documentElement.getAttributeNS("http://www.example.com", "attr") is "value"
8 PASS successfullyParsed is true