
PASS Initialize Request with headers values 
PASS Initialize Request's body with "undefined", undefined 
PASS Initialize Request's body with "null", null 
PASS Initialize Request's body with "[object Blob]", application/octet-binary 
FAIL Initialize Request's body with "[object FormData]", multipart/form-data promise_test: Unhandled rejection with value: object "NotSupportedError: The operation is not supported."
PASS Initialize Request's body with "This is a USVString", text/plain;charset=UTF-8 
PASS Initialize Request's body with "hi!", text/plain;charset=UTF-8 
PASS Initialize Request's body with "name=value", application/x-www-form-urlencoded;charset=UTF-8