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;; This file is part of scheme-GNUnet.
;; Copyright (C) 2021 Maxime Devos
;;
;; scheme-GNUnet is free software: you can redistribute it and/or modify it
;; under the terms of the GNU Affero General Public License as published
;; by the Free Software Foundation, either version 3 of the License,
;; or (at your option) any later version.
;;
;; scheme-GNUnet is distributed in the hope that it will be useful, but
;; WITHOUT ANY WARRANTY; without even the implied warranty of
;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
;; Affero General Public License for more details.
;;
;; You should have received a copy of the GNU Affero General Public License
;; along with this program. If not, see <http://www.gnu.org/licenses/>.
;;
;; SPDX-License-Identifier: AGPL3.0-or-later
(use-modules (gnu gnunet mq handler)
(gnu gnunet message protocols)
(gnu extractor enum)
(rnrs base))
(test-begin "mq-handler")
(test-assert "constructor docstring"
(procedure-documentation make-message-handler))
(define (bogus-verifier x)
(throw 'what #:verifier))
(define (bogus-interposition thunk)
(thow 'what #:interposition))
(define (bogus-handler x)
(throw 'what #:handler))
(define bogus-handler
(cute make-message-handler <> bogus-interposition
bogus-verifier bogus-handler))
(define (uninteresting-interposition thunk)
(thunk))
;; Message indices
(test-equal "message handler index (0)"
0 (message-handler-index (bogus-handler 0)))
(test-equal "message handler index (65535)"
65535 (message-handler-index (bogus-handler 65535)))
(test-error "message handler OOB (< 0)" #t
(message-handler-index (bogus-handler -1)))
(test-error "message handler OOB (> 65535)" #t
(message-handler-index (bogus-handler -1)))
(test-error "message handler inexact" #t
(message-handler-index (bogus-handler -1)))
(test-equal "message handler enum value"
777
(message-handler-index
(bogus-handler (integer->value message-type 777))))
(define %arbitrary-index #xdead)
(define-syntax ^vals
(syntax-rules ()
((_ exp) (call-with-values (lambda () exp) list))))
;; Handlers may return multiple values.
;;
;; (Currently, handle-message! is even tail-recursive,
;; but that's not guaranteed)
(test-equal "handlers with zero values"
'()
(^vals (handle-message!
(make-message-handler %arbitrary-index
uninteresting-interposition
bogus-verifier
(lambda (message)
(values)))
'message)))
(test-equal "handlers with three values"
'(x y z)
(^vals (handle-message!
(make-message-handler %arbitrary-index
uninteresting-interposition
bogus-verifier
(lambda (message)
(values 'x 'y 'z)))
'dont-care)))
;; Dynamic environment tests
(let* ((nestedness (make-parameter 0))
(is-set? #f)
(return-nestedness
(lambda (message)
(nestedness)))
(interposition (lambda (thunk)
(assert (not is-set?))
(set! is-set? #t)
(parameterize ((nestedness (1+ (nestedness))))
(thunk)))))
(test-equal "dynamic environment adjusted exactly once (verifier)"
1
(verify-message?
(make-message-handler %arbitrary-index interposition
return-nestedness bogus-handler)
"message"))
(set! is-set? #f)
(test-equal "dynamic environment adjusted exactly once (handler)"
1
(handle-message!
(make-message-handler %arbitrary-index interposition
bogus-verifier return-nestedness)
'anything))
(set! is-set? #f))
;; Multiple handler tests
(test-equal "message handler OOB (0,0)"
#f
(message-handler-for (message-handlers) 0))
(test-equal "message handler OOB (0,high)"
#f
(message-handler-for (message-handlers) 9))
;; 0, 65535: two extreme values
;; 777: something else entirely
(let* ((indices `(0 777 65535))
(all-handlers (map bogus-handler indices))
(handlers (apply message-handlers all-handlers)))
(for-each
(lambda (i handler)
;; Both numeric and typed value are acceptable.
;; Whatever's convenient to the caller.
(test-eq "message handler (non-empty, numeric)"
handler
(message-handler-for handlers i))
(test-eq "message handler (non-empty, enum value)"
handler
(message-handler-for handlers (integer->value message-type i))))
indices all-handlers))
(test-end "mq-handler")
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