Test that we can send empty name in FormData.append()

On success, you will see a series of "PASS" messages, followed by "TEST COMPLETE".

PASS the FormData of string type containing a empty name echoed correctly
PASS the FormData of string type containing a name echoed correctly
PASS the FormData of file type containing a empty name echoed correctly
PASS the FormData of file type containing a name echoed correctly
PASS successfullyParsed is true

TEST COMPLETE