/usr/share/scheme48-1.9/big/queue-check.scm is in scheme48 1.9-5.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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; Authors: Robert Ransom
(define-test-suite queues-tests)
(define-syntax with-queue
(syntax-rules ()
((with-queue (?var) . ?body)
(let ((?var (make-queue))) . ?body))))
;;; TODO? - move to utility package?
(define-syntax list*
(syntax-rules (skip)
((list* (skip ?expr) . ?rest)
(begin ?expr
(list* . ?rest)))
((list* ?expr . ?rest)
(let ((x ?expr))
(cons x (list* . ?rest))))
((list*)
'())))
;;; TODO? - rename to PROVISIONAL-CELL-PUSH! and move to utility package?
(define (prov-cell-push! c x)
(ensure-atomicity!
(provisional-cell-set! c (cons x (provisional-cell-ref c)))))
;; Test wrapper for ENQUEUE!. Real applications should use
;; ENQUEUE-MANY!, which is faster.
(define (stuff-queue! q xs)
(ensure-atomicity!
(for-each (lambda (x) (enqueue! q x)) xs)))
(define (devour-queue! q)
(ensure-atomicity
(let loop ((acc '()))
(if (queue-empty? q)
(reverse acc)
(loop (cons (dequeue! q) acc))))))
(define (suck-queue! q n)
(ensure-atomicity
(let loop ((acc '())
(n n))
(if (or (queue-empty? q)
(<= n 0))
(reverse acc)
(loop (cons (dequeue! q) acc)
(- n 1))))))
;;; Tests for utility functions used by the queues package.
(define-test-case list->queue-list queues-tests
(for-each
(lambda (xs)
(check (receive (head tail) (list->queue-list xs)
(list xs (cdr head)))
=> (list xs xs))
(if (not (null? xs))
(check (receive (head tail) (list->queue-list xs)
(list xs tail))
=> (list xs (srfi-1:last-pair xs))))
(check (receive (head tail) (list->queue-list xs)
(list xs (eq? (srfi-1:last-pair head) tail)))
=> (list xs #t)))
'(() (foo) (foo bar) (foo bar baz) (foo bar baz quux))))
;;; Tests for the queue operations we plan to keep.
(define (do-basic-tests!)
(check (with-queue (q)
(enqueue! q 'a)
(dequeue! q))
=> 'a)
(check (with-queue (q)
(stuff-queue! q '(a b c a b c))
(devour-queue! q))
=> '(a b c a b c))
(check (with-queue (q)
(stuff-queue! q '(a b c a b c))
(list* (suck-queue! q 3)
(skip (stuff-queue! q '(d e f)))
(devour-queue! q)))
=> '((a b c) (a b c d e f)))
(check (with-queue (q)
(stuff-queue! q '(a b c a b c))
(list* (suck-queue! q 3)
(skip (enqueue-many! q '(d e f)))
(devour-queue! q)))
=> '((a b c) (a b c d e f)))
(check (with-queue (q)
(stuff-queue! q '(a b c a b c))
(list* (devour-queue! q)
(maybe-dequeue! q)
(skip (stuff-queue! q '(d e f)))
(maybe-dequeue! q)
(devour-queue! q)))
=> '((a b c a b c)
#f
d
(e f))))
(define-test-case basics queues-tests
(do-basic-tests!))
(define-test-case basics-in-big-transaction queues-tests
(ensure-atomicity!
;; Calling CHECK inside a transaction is normally a *bad* idea, but
;; this transaction should not need to be restarted.
(do-basic-tests!)))
(define-test-case basics-comment-tests queues-tests
(check (let ((q (make-queue))
(c (make-cell '())))
(enqueue! q 'a)
(ensure-atomicity!
(enqueue! q 'b)
(prov-cell-push! c (maybe-dequeue! q)))
(prov-cell-push! c (maybe-dequeue! q))
(cell-ref c))
=> '(b a)))
(define-test-case queue-head queues-tests
(check-exception (with-queue (q) (queue-head q)))
(check (with-queue (q)
(stuff-queue! q '(a b c))
(queue-head q))
=> 'a))
(define-test-case list->queue queues-tests
(check (let ((q (list->queue '(a b c d))))
(list* (suck-queue! q 2)
(skip (stuff-queue! q '(e f g)))
(devour-queue! q)))
=> '((a b)
(c d e f g))))
;;; Delenda.
(define-test-case delenda-comment-tests queues-tests
(check (let ((q (make-queue))
(c (make-cell 'OOPS)))
(enqueue! q 'a)
(ensure-atomicity!
(enqueue! q 'b)
(provisional-cell-set! c (queue->list q)))
(cell-ref c))
=> '(a b))
(check (let ((q (make-queue))
(c (make-cell 'OOPS)))
(enqueue! q 'a)
(ensure-atomicity!
(enqueue! q 'b)
(provisional-cell-set! c (queue-length q)))
(cell-ref c))
=> 2)
(check (let ((q (make-queue))
(c (make-cell 'OOPS)))
(enqueue! q 'a)
(ensure-atomicity!
(enqueue! q 'b)
(provisional-cell-set! c (on-queue? q 'b)))
(cell-ref c))
=> #t)
;; The following test is no longer in a comment, but might as well
;; stay here.
(check (let ((q (make-queue))
(c (make-cell '())))
(enqueue! q 'a)
(ensure-atomicity!
(enqueue! q 'b)
(prov-cell-push! c (delete-from-queue! q 'b))
(prov-cell-push! c (maybe-dequeue! q))
(prov-cell-push! c (maybe-dequeue! q)))
(cell-ref c))
=> '(#f a #t)))
(define-test-case queue-length queues-tests
(for-each
(lambda (n)
(check (with-queue (q)
(stuff-queue! q (srfi-1:iota n))
(queue-length q))
=> n))
'(0 1 2 3 4 5 6 7 8 9 10)))
(define-test-case delete-from-queue! queues-tests
(for-each
(lambda (x)
(check (with-queue (q)
(stuff-queue! q '(a b c a b c))
(list* x
(delete-from-queue! q x)
(devour-queue! q)))
=> (list x
(x->boolean (memq x '(a b c)))
(append (delq x '(a b c))
'(a b c)))))
'(a b c d))
(for-each
(lambda (x)
(check (with-queue (q)
(stuff-queue! q '(a b c a b c))
(list* x
(delete-from-queue! q x)
(skip (stuff-queue! q '(d e f)))
(devour-queue! q)))
=> (list x
(x->boolean (memq x '(a b c)))
(append (delq x '(a b c))
'(a b c d e f)))))
'(a b c d)))
(define-test-case on-queue? queues-tests
(check
(map (lambda (x)
(with-queue (q)
(stuff-queue! q '(a b c))
(on-queue? q x)))
'(a b c d))
=> '(#t #t #t #f))
(check
(map (lambda (x)
(with-queue (q)
(on-queue? q x)))
'(a b c d))
=> '(#f #f #f #f)))
(define-test-case queue->list queues-tests
(check (with-queue (q)
(stuff-queue! q '(a b c d e f))
(list* (queue->list q)
(suck-queue! q 2)
(skip (stuff-queue! q '(g h)))
(queue->list q)
(devour-queue! q)))
=> '((a b c d e f)
(a b)
(c d e f g h)
(c d e f g h))))
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