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(define-module (test-frame)
#:use-module (srfi srfi-1)
#:use-module (srfi srfi-64)
#:use-module (ice-9 match)
#:use-module (rnrs bytevectors)
#:use-module (rnrs io ports)
#:use-module (web socket frame))
(define (hex-string->bytevector str)
"Convert the hexadecimal encoded string STR to a bytevector."
(define hex-char->int
(match-lambda
(#\0 0)
(#\1 1)
(#\2 2)
(#\3 3)
(#\4 4)
(#\5 5)
(#\6 6)
(#\7 7)
(#\8 8)
(#\9 9)
(#\a 10)
(#\b 11)
(#\c 12)
(#\d 13)
(#\e 14)
(#\f 15)))
(define (read-byte i)
(let ((j (* 2 i)))
(+ (hex-char->int (string-ref str (1+ j)))
(* (hex-char->int (string-ref str j)) 16))))
(let* ((len (/ (string-length str) 2))
(bv (make-bytevector len)))
(let loop ((i 0))
(if (= i len)
bv
(begin
(bytevector-u8-set! bv i (read-byte i))
(loop (1+ i)))))))
(define (bytevector->hex-string bv)
(define int->hex-char
(match-lambda
(0 #\0)
(1 #\1)
(2 #\2)
(3 #\3)
(4 #\4)
(5 #\5)
(6 #\6)
(7 #\7)
(8 #\8)
(9 #\9)
(10 #\a)
(11 #\b)
(12 #\c)
(13 #\d)
(14 #\e)
(15 #\f)))
(list->string
(append-map (lambda (x)
(let ((high (ash (logand x #xf0) -4))
(low (logand x #x0f)))
(list (int->hex-char high)
(int->hex-char low))))
(bytevector->u8-list bv))))
(define (call-with-input-bytevector bv proc)
(let ((port (open-bytevector-input-port bv)))
(dynamic-wind
(const #t)
(lambda ()
(proc port))
(lambda ()
(close-port port)))))
(define (frame->hex-string frame)
(call-with-values open-bytevector-output-port
(lambda (port get-bytevector)
(write-frame frame port)
(bytevector->hex-string (get-bytevector)))))
(define (bytevector->frame bv)
(call-with-input-bytevector bv read-frame))
(define (hex-string->frame str)
(bytevector->frame (hex-string->bytevector str)))
(test-begin "frame")
(test-equal "read unmasked text message"
(hex-string->frame "810548656c6c6f")
(make-text-frame "Hello"))
(test-equal "write unmasked text message"
"810548656c6c6f"
(frame->hex-string (make-text-frame "Hello")))
(test-equal "read masked text message"
(hex-string->frame "818537fa213d7f9f4d5158")
(make-text-frame "Hello" #vu8(#x37 #xfa #x21 #x3d)))
(test-equal "write masked text message"
"818537fa213d7f9f4d5158"
(frame->hex-string (make-text-frame "Hello" #vu8(#x37 #xfa #x21 #x3d))))
(test-equal "read fragmented umasked text message"
(list (hex-string->frame "010348656c")
(hex-string->frame "80026c6f"))
(list (make-frame #f 'text #f (string->utf8 "Hel"))
(make-frame #t 'continuation #f (string->utf8 "lo"))))
(test-equal "read unmasked ping frame"
(hex-string->frame "890548656c6c6f")
(make-ping-frame (string->utf8 "Hello")))
(test-equal "write unmasked ping frame"
"890548656c6c6f"
(frame->hex-string (make-ping-frame (string->utf8 "Hello"))))
(test-equal "read masked pong frame"
(hex-string->frame "8a8537fa213d7f9f4d5158")
(make-pong-frame (string->utf8 "Hello") #vu8(#x37 #xfa #x21 #x3d)))
(test-equal "write masked pong frame"
"8a8537fa213d7f9f4d5158"
(frame->hex-string
(make-pong-frame (string->utf8 "Hello") #vu8(#x37 #xfa #x21 #x3d))))
(test-equal "read 256 bytes binary message in a single unmasked frame"
(let* ((header (hex-string->bytevector "827e0100"))
(len (bytevector-length header))
(frame (make-bytevector (+ len 256) 170)))
(bytevector-copy! header 0 frame 0 len)
(bytevector->frame frame))
(make-binary-frame (make-bytevector 256 170)))
(test-equal "read 64KiB binary message in a single unmasked frame"
(let* ((header (hex-string->bytevector "827f0000000000010000"))
(len (bytevector-length header))
(frame (make-bytevector (+ len 65536) 170)))
(bytevector-copy! header 0 frame 0 len)
(bytevector->frame frame))
(make-binary-frame (make-bytevector 65536 170)))
(test-equal "frame-length"
10
(frame-length (make-binary-frame (make-bytevector 10))))
(test-equal "frame-concatenate"
#vu8(1 2 3 4 5)
(frame-concatenate
(list (make-binary-frame #vu8(1 2 3))
(make-binary-frame #vu8(4 5)))))
(test-equal "text-frame->string"
"Hello"
(text-frame->string (make-text-frame "Hello")))
(test-equal "text-frames->string"
"Hello"
(text-frames->string
(list (make-text-frame "Hel")
(make-text-frame "lo"))))
(test-end "frame")
(exit (= (test-runner-fail-count (test-runner-current)) 0))
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