#args: <http-operation> <url> <response-code> [file]
#Expects the env $RESULT to contain the expected RESULT.
#If json, the RESULT shall begin with 'json:'.
#args: <http-operation> <url> <response-code> [file]
#Expects the env $RESULT to contain the expected RESULT.
#If json, the RESULT shall begin with 'json:'.