guile/test-suite/tests/r4rs.test

;;;; r4rs.test --- tests for R4RS compliance      -*- scheme -*-
;;;; Copyright (C) 1991, 1992, 1993, 1994, 1995, 1999, 2001, 2006, 2023 Free Software Foundation, Inc.
;;;; 
;;;; This library is free software; you can redistribute it and/or
;;;; modify it under the terms of the GNU Lesser General Public
;;;; License as published by the Free Software Foundation; either
;;;; version 3 of the License, or (at your option) any later version.
;;;; 
;;;; This library 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
;;;; Lesser General Public License for more details.
;;;; 
;;;; You should have received a copy of the GNU Lesser General Public
;;;; License along with this library; if not, write to the Free Software
;;;; Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA

(define-module (test-suite test-r4rs)
  :use-module (test-suite lib)
  :use-module (test-suite guile-test))


;;;; ============= NOTE =============

;;;; This file is a quick-and-dirty adaptation of Aubrey's test suite
;;;; to Guile's testing framework.  As such, it's not as clean as one
;;;; might hope.  (In particular, it uses with-test-prefix oddly.)
;;;;
;;;; If you're looking for an example of a test suite to imitate, you
;;;; might do better by looking at ports.test, which uses the
;;;; (test-suite lib) functions much more idiomatically.


;;;; "test.scm" Test correctness of scheme implementations.
;;;; Author: Aubrey Jaffer
;;;; Modified: Mikael Djurfeldt
;;;;   Removed tests which Guile deliberately
;;;;   won't pass.  Made the tests (test-cont), (test-sc4), and
;;;;   (test-delay) start to run automatically.
;;;; Modified: Jim Blandy
;;;;   adapted to new Guile test suite framework

;;; This includes examples from
;;; William Clinger and Jonathan Rees, editors.
;;; Revised^4 Report on the Algorithmic Language Scheme
;;; and the IEEE specification.

;;; The input tests read this file expecting it to be named
;;; "test.scm", so you'll have to run it from the ice-9 source
;;; directory, or copy this file elsewhere
;;; Files `tmp1', `tmp2' and `tmp3' will be created in the course of running
;;; these tests.  You may need to delete them in order to run
;;; "test.scm" more than once.

;;;   There are three optional tests:
;;; (TEST-CONT) tests multiple returns from call-with-current-continuation
;;; 
;;; (TEST-SC4) tests procedures required by R4RS but not by IEEE
;;; 
;;; (TEST-DELAY) tests DELAY and FORCE, which are not required by
;;;   either standard.

;;; If you are testing a R3RS version which does not have `list?' do:
;;; (define list? #f)

;;; send corrections or additions to [email protected] or
;;; Aubrey Jaffer, 84 Pleasant St., Wakefield MA 01880, USA

;; Note: The following two expressions are being read as part of the tests in
;; section (6 10 2).  Those tests expect that above the following two
;; expressions there should be only one arbitrary s-expression (which is the
;; define-module expression).  Further, the two expressions should be written
;; on one single line without a blank between them.  If you change this, you
;; will also have to change the corresponding tests in section (6 10 2).

(define cur-section '())(define errs '())

(define SECTION (lambda args
		  (set! cur-section args) #t))
(define record-error (lambda (e) (set! errs (cons (list cur-section e) errs))))
(define (report-errs) #f)

(define test
  (lambda (expect fun . args)
    (let ((res (if (procedure? fun) (apply fun args) (car args))))
      (with-test-prefix cur-section
	(pass-if (call-with-output-string (lambda (port)
					    (write (cons fun args) port)))
		 (equal? expect res))))))

;; test that all symbol characters are supported.
(SECTION 2 1)
'(+ - ... !.. $.+ %.- &.! *.: /:. :+. <-. =. >. ?. ~. _. ^.)

(SECTION 3 4)
(define disjoint-type-functions
  (list boolean? char? null? number? pair? procedure? string? symbol? vector?))
(define type-examples
  (list
   #t #f #\a '() 9739 '(test) (lambda () #f) car "test" "" 'test
   '#() '#(a b c)))
(define type-matrix
  (map (lambda (x)
         (let ((t (map (lambda (f) (f x)) disjoint-type-functions)))
           t))
       type-examples))
(for-each (lambda (object row)
            (let ((count (apply + (map (lambda (elt) (if elt 1 0))
                                       row))))
              (pass-if (call-with-output-string
                        (lambda (port)
                          (display "object recognized by only one predicate: "
				   port)
                          (display object port)))
                       (= count 1))))
          type-examples
          type-matrix)

(SECTION 4 1 2)
(test '(quote a) 'quote (quote 'a))
(test '(quote a) 'quote ''a)
(SECTION 4 1 3)
(test 12 (if #f + *) 3 4)
(SECTION 4 1 4)
(test 8 (lambda (x) (+ x x)) 4)
(define reverse-subtract
  (lambda (x y) (- y x)))
(test 3 reverse-subtract 7 10)
(define add4
  (let ((x 4))
    (lambda (y) (+ x y))))
(test 10 add4 6)
(test '(3 4 5 6) (lambda x x) 3 4 5 6)
(test '(5 6) (lambda (x y . z) z) 3 4 5 6)
(SECTION 4 1 5)
(test 'yes 'if (if (> 3 2) 'yes 'no))
(test 'no 'if (if (> 2 3) 'yes 'no))
(test '1 'if (if (> 3 2) (- 3 2) (+ 3 2)))
(SECTION 4 1 6)
(define x 2)
(test 3 'define (+ x 1))
(set! x 4)
(test 5 'set! (+ x 1))
(SECTION 4 2 1)
(test 'greater 'cond (cond ((> 3 2) 'greater)
			   ((< 3 2) 'less)))
(test 'equal 'cond (cond ((> 3 3) 'greater)
			 ((< 3 3) 'less)
			 (else 'equal)))
(test 2 'cond (cond ((assv 'b '((a 1) (b 2))) => cadr)
		     (else #f)))
(test 'composite 'case (case (* 2 3)
			 ((2 3 5 7) 'prime)
			 ((1 4 6 8 9) 'composite)))
(test 'consonant 'case (case (car '(c d))
			 ((a e i o u) 'vowel)
			 ((w y) 'semivowel)
			 (else 'consonant)))
(test #t 'and (and (= 2 2) (> 2 1)))
(test #f 'and (and (= 2 2) (< 2 1)))
(test '(f g) 'and (and 1 2 'c '(f g)))
(test #t 'and (and))
(test #t 'or (or (= 2 2) (> 2 1)))
(test #t 'or (or (= 2 2) (< 2 1)))
(test #f 'or (or #f #f #f))
(test #f 'or (or))
(test '(b c) 'or (or (memq 'b '(a b c)) (+ 3 0)))
(SECTION 4 2 2)
(test 6 'let (let ((x 2) (y 3)) (* x y)))
(test 35 'let (let ((x 2) (y 3)) (let ((x 7) (z (+ x y))) (* z x))))
(test 70 'let* (let ((x 2) (y 3)) (let* ((x 7) (z (+ x y))) (* z x))))
(test #t 'letrec (letrec ((even?
			   (lambda (n) (if (zero? n) #t (odd? (- n 1)))))
			  (odd?
			   (lambda (n) (if (zero? n) #f (even? (- n 1))))))
		   (even? 88)))
(define x 34)
(test 5 'let (let ((x 3)) (define x 5) x))
(test 34 'let x)
(test 6 'let (let () (define x 6) x))
(test 34 'let x)
(test 7 'let* (let* ((x 3)) (define x 7) x))
(test 34 'let* x)
(test 8 'let* (let* () (define x 8) x))
(test 34 'let* x)
(test 9 'letrec (letrec () (define x 9) x))
(test 34 'letrec x)
(test 10 'letrec (letrec ((x 3)) (define x 10) x))
(test 34 'letrec x)
(SECTION 4 2 3)
(define x 0)
(test 6 'begin (begin (set! x 5) (+ x 1)))
(SECTION 4 2 4)
(test '#(0 1 2 3 4) 'do (do ((vec (make-vector 5))
			    (i 0 (+ i 1)))
			   ((= i 5) vec)
			 (vector-set! vec i i)))
(test 25 'do (let ((x '(1 3 5 7 9)))
	       (do ((x x (cdr x))
		    (sum 0 (+ sum (car x))))
		   ((null? x) sum))))
(test 1 'let (let foo () 1))
(test '((6 1 3) (-5 -2)) 'let
      (let loop ((numbers '(3 -2 1 6 -5))
		 (nonneg '())
		 (neg '()))
	(cond ((null? numbers) (list nonneg neg))
	      ((negative? (car numbers))
	       (loop (cdr numbers)
		     nonneg
		     (cons (car numbers) neg)))
	      (else
	       (loop (cdr numbers)
		     (cons (car numbers) nonneg)
		     neg)))))
(SECTION 4 2 6)
(test '(list 3 4) 'quasiquote `(list ,(+ 1 2) 4))
(test '(list a (quote a)) 'quasiquote (let ((name 'a)) `(list ,name ',name)))
(test '(a 3 4 5 6 b) 'quasiquote `(a ,(+ 1 2) ,@(map abs '(4 -5 6)) b))
(test '((foo 7) . cons)
	'quasiquote
	`((foo ,(- 10 3)) ,@(cdr '(c)) . ,(car '(cons))))

;;; sqt is defined here because not all implementations are required to
;;; support it. 
(define (sqt x)
	(do ((i 0 (+ i 1)))
	    ((> (* i i) x) (- i 1))))

(test '#(10 5 2 4 3 8) 'quasiquote `#(10 5 ,(sqt 4) ,@(map sqt '(16 9)) 8))
(test 5 'quasiquote `,(+ 2 3))
(test '(a `(b ,(+ 1 2) ,(foo 4 d) e) f)
      'quasiquote `(a `(b ,(+ 1 2) ,(foo ,(+ 1 3) d) e) f))
(test '(a `(b ,x ,'y d) e) 'quasiquote
	(let ((name1 'x) (name2 'y)) `(a `(b ,,name1 ,',name2 d) e)))
(test '(list 3 4) 'quasiquote (quasiquote (list (unquote (+ 1 2)) 4)))
(test '`(list ,(+ 1 2) 4) 'quasiquote '(quasiquote (list (unquote (+ 1 2)) 4)))
(SECTION 5 2 1)
(define add3 (lambda (x) (+ x 3)))
(test 6 'define (add3 3))
(define first car)
(test 1 'define (first '(1 2)))
(SECTION 5 2 2)
(test 45 'define
	(let ((x 5))
		(define foo (lambda (y) (bar x y)))
		(define bar (lambda (a b) (+ (* a b) a)))
		(foo (+ x 3))))
(define x 34)
(define (foo) (define x 5) x)
(test 5 foo)
(test 34 'define x)
(define foo (lambda () (define x 5) x))
(test 5 foo)
(test 34 'define x)
(define (foo x) ((lambda () (define x 5) x)) x)
(test 88 foo 88)
(test 4 foo 4)
(test 34 'define x)
(SECTION 6 1)
(test #f not #t)
(test #f not 3)
(test #f not (list 3))
(test #t not #f)
(test #f not '())
(test #f not (list))
(test #f not 'nil)

(test #t boolean? #f)
(test #f boolean? 0)
(test #f boolean? '())
(SECTION 6 2)
(test #t eqv? 'a 'a)
(test #f eqv? 'a 'b)
(test #t eqv? 2 2)
(test #t eqv? '() '())
(test #t eqv? '10000 '10000)
(test #f eqv? (cons 1 2)(cons 1 2))
(test #f eqv? (lambda () 1) (lambda () 2))
(test #f eqv? #f 'nil)
(let ((p (lambda (x) x)))
  (test #t eqv? p p))
(define gen-counter
 (lambda ()
   (let ((n 0))
      (lambda () (set! n (+ n 1)) n))))
(let ((g (gen-counter))) (test #t eqv? g g))
(test #f eqv? (gen-counter) (gen-counter))
(letrec ((f (lambda () (if (eqv? f g) 'f 'both)))
	 (g (lambda () (if (eqv? f g) 'g 'both))))
  (test #f eqv? f g))

(test #t eq? 'a 'a)
(test #f eq? (list 'a) (list 'a))
(test #t eq? '() '())
(test #t eq? car car)
(let ((x '(a))) (test #t eq? x x))
(let ((x '#())) (test #t eq? x x))
(let ((x (lambda (x) x))) (test #t eq? x x))

(test #t equal? 'a 'a)
(test #t equal? '(a) '(a))
(test #t equal? '(a (b) c) '(a (b) c))
(test #t equal? "abc" "abc")
(test #t equal? 2 2)
(test #t equal? (make-vector 5 'a) (make-vector 5 'a))
(SECTION 6 3)
(test '(a b c d e) 'dot '(a . (b . (c . (d . (e . ()))))))
(define x (list 'a 'b 'c))
(define y x)
(and list? (test #t list? y))
(set-cdr! x 4)
(test '(a . 4) 'set-cdr! x)
(test #t eqv? x y)
(test '(a b c . d) 'dot '(a . (b . (c . d))))
(and list? (test #f list? y))
(and list? (let ((x (list 'a))) (set-cdr! x x) (test #f 'list? (list? x))))

(test #t pair? '(a . b))
(test #t pair? '(a . 1))
(test #t pair? '(a b c))
(test #f pair? '())
(test #f pair? '#(a b))

(test '(a) cons 'a '())
(test '((a) b c d) cons '(a) '(b c d))
(test '("a" b c) cons "a" '(b c))
(test '(a . 3) cons 'a 3)
(test '((a b) . c) cons '(a b) 'c)

(test 'a car '(a b c))
(test '(a) car '((a) b c d))
(test 1 car '(1 . 2))

(test '(b c d) cdr '((a) b c d))
(test 2 cdr '(1 . 2))

(test '(a 7 c) list 'a (+ 3 4) 'c)
(test '() list)

(test 3 length '(a b c))
(test 3 length '(a (b) (c d e)))
(test 0 length '())

(test '(x y) append '(x) '(y))
(test '(a b c d) append '(a) '(b c d))
(test '(a (b) (c)) append '(a (b)) '((c)))
(test '() append)
(test '(a b c . d) append '(a b) '(c . d))
(test 'a append '() 'a)

(test '(c b a) reverse '(a b c))
(test '((e (f)) d (b c) a) reverse '(a (b c) d (e (f))))

(test 'c list-ref '(a b c d) 2)

(test '(a b c) memq 'a '(a b c))
(test '(b c) memq 'b '(a b c))
(test '#f memq 'a '(b c d))
(test '#f memq (list 'a) '(b (a) c))
(test '((a) c) member (list 'a) '(b (a) c))
(test '(101 102) memv 101 '(100 101 102))

(define e '((a 1) (b 2) (c 3)))
(test '(a 1) assq 'a e)
(test '(b 2) assq 'b e)
(test #f assq 'd e)
(test #f assq (list 'a) '(((a)) ((b)) ((c))))
(test '((a)) assoc (list 'a) '(((a)) ((b)) ((c))))
(test '(5 7) assv 5 '((2 3) (5 7) (11 13)))
(SECTION 6 4)
(test #t symbol? 'foo)
(test #t symbol? (car '(a b)))
(test #f symbol? "bar")
(test #t symbol? 'nil)
(test #f symbol? '())
(test #f symbol? #f)
;;; But first, what case are symbols in?  Determine the standard case:
(define char-standard-case char-upcase)
(if (string=? (symbol->string 'A) "a")
    (set! char-standard-case char-downcase))
;;; Not for Guile
;(test #t 'standard-case
;      (string=? (symbol->string 'a) (symbol->string 'A)))
;(test #t 'standard-case
;      (or (string=? (symbol->string 'a) "A")
;	  (string=? (symbol->string 'A) "a")))
(define (str-copy s)
  (let ((v (make-string (string-length s))))
    (do ((i (- (string-length v) 1) (- i 1)))
	((< i 0) v)
      (string-set! v i (string-ref s i)))))
(define (string-standard-case s)
  (set! s (str-copy s))
  (do ((i 0 (+ 1 i))
       (sl (string-length s)))
      ((>= i sl) s)
      (string-set! s i (char-standard-case (string-ref s i)))))
;;; Not for Guile
;(test (string-standard-case "flying-fish") symbol->string 'flying-fish)
;(test (string-standard-case "martin") symbol->string 'Martin)
(test "Malvina" symbol->string (string->symbol "Malvina"))
;;; Not for Guile
;(test #t 'standard-case (eq? 'a 'A))

(define x (string #\a #\b))
(define y (string->symbol x))
(string-set! x 0 #\c)
(test "cb" 'string-set! x)
(test "ab" symbol->string y)
(test y string->symbol "ab")

;;; Not for Guile
;(test #t eq? 'mISSISSIppi 'mississippi)
;(test #f 'string->symbol (eq? 'bitBlt (string->symbol "bitBlt")))
(test 'HeyJeffrey string->symbol (symbol->string 'HeyJeffrey))

(SECTION 6 5 5)
(test #t number? 3)
(test #t complex? 3)
(test #t real? 3)
(test #t rational? 3)
(test #t integer? 3)

(test #t exact? 3)
(test #f inexact? 3)

(test #t = 22 22 22)
(test #t = 22 22)
(test #f = 34 34 35)
(test #f = 34 35)
(test #t > 3 -6246)
(test #f > 9 9 -2424)
(test #t >= 3 -4 -6246)
(test #t >= 9 9)
(test #f >= 8 9)
(test #t < -1 2 3 4 5 6 7 8)
(test #f < -1 2 3 4 4 5 6 7)
(test #t <= -1 2 3 4 5 6 7 8)
(test #t <= -1 2 3 4 4 5 6 7)
(test #f < 1 3 2)
(test #f >= 1 3 2)

(test #t zero? 0)
(test #f zero? 1)
(test #f zero? -1)
(test #f zero? -100)
(test #t positive? 4)
(test #f positive? -4)
(test #f positive? 0)
(test #f negative? 4)
(test #t negative? -4)
(test #f negative? 0)
(test #t odd? 3)
(test #f odd? 2)
(test #f odd? -4)
(test #t odd? -1)
(test #f even? 3)
(test #t even? 2)
(test #t even? -4)
(test #f even? -1)

(test 38 max 34 5 7 38 6)
(test -24 min 3  5 5 330 4 -24)

(test 7 + 3 4)
(test '3 + 3)
(test 0 +)
(test 4 * 4)
(test 1 *)

(test -1 - 3 4)
(test -3 - 3)
(test 7 abs -7)
(test 7 abs 7)
(test 0 abs 0)

(test 5 quotient 35 7)
(test -5 quotient -35 7)
(test -5 quotient 35 -7)
(test 5 quotient -35 -7)
(test 1 modulo 13 4)
(test 1 remainder 13 4)
(test 3 modulo -13 4)
(test -1 remainder -13 4)
(test -3 modulo 13 -4)
(test 1 remainder 13 -4)
(test -1 modulo -13 -4)
(test -1 remainder -13 -4)
(define (divtest n1 n2)
	(= n1 (+ (* n2 (quotient n1 n2))
		 (remainder n1 n2))))
(test #t divtest 238 9)
(test #t divtest -238 9)
(test #t divtest 238 -9)
(test #t divtest -238 -9)

(test 4 gcd 0 4)
(test 4 gcd -4 0)
(test 4 gcd 32 -36)
(test 0 gcd)
(test 288 lcm 32 -36)
(test 1 lcm)

;;;;From: [email protected] (Fred J Kaudel)
;;; Modified by jaffer.
(define (test-inexact)
  (define f3.9 (string->number "3.9"))
  (define f4.0 (string->number "4.0"))
  (define f-3.25 (string->number "-3.25"))
  (define f.25 (string->number ".25"))
  (define f4.5 (string->number "4.5"))
  (define f3.5 (string->number "3.5"))
  (define f0.0 (string->number "0.0"))
  (define f0.8 (string->number "0.8"))
  (define f1.0 (string->number "1.0"))
  (define wto write-test-obj)
  (define dto display-test-obj)
  (define lto load-test-obj)
  (SECTION 6 5 5)
  (test #t inexact? f3.9)
  (test #t 'inexact? (inexact? (max f3.9 4)))
  (test f4.0 'max (max f3.9 4))
  (test f4.0 'exact->inexact (exact->inexact 4))
  (test (- f4.0) round (- f4.5))
  (test (- f4.0) round (- f3.5))
  (test (- f4.0) round (- f3.9))
  (test f0.0 round f0.0)
  (test f0.0 round f.25)
  (test f1.0 round f0.8)
  (test f4.0 round f3.5)
  (test f4.0 round f4.5)
  (set! write-test-obj (list f.25 f-3.25));.25 inexact errors less likely.
  (set! display-test-obj (list f.25 f-3.25));.3 often has such errors (~10^-13)
  (set! load-test-obj (list 'define 'foo (list 'quote write-test-obj)))
  (test #t call-with-output-file
      (data-file-name "tmp3")
      (lambda (test-file)
	(write-char #\; test-file)
	(display write-test-obj test-file)
	(newline test-file)
	(write load-test-obj test-file)
	(output-port? test-file)))
  (check-test-file (data-file-name "tmp3"))
  (set! write-test-obj wto)
  (set! display-test-obj dto)
  (set! load-test-obj lto)
  (let ((x (string->number "4195835.0"))
	(y (string->number "3145727.0")))
    (test #t 'pentium-fdiv-bug (> f1.0 (- x (* (/ x y) y)))))
  (report-errs))

(define (test-bignum)
  (define tb
    (lambda (n1 n2)
      (= n1 (+ (* n2 (quotient n1 n2))
	       (remainder n1 n2)))))
  (SECTION 6 5 5)
  (test 0 modulo -2177452800 86400)
  (test 0 modulo 2177452800 -86400)
  (test 0 modulo 2177452800 86400)
  (test 0 modulo -2177452800 -86400)
  (test #t 'remainder (tb 281474976710655 65535))
  (test #t 'remainder (tb 281474976710654 65535))
  (SECTION 6 5 6)
  (test 281474976710655 string->number "281474976710655")
  (test "281474976710655" number->string 281474976710655)
  (report-errs))

(SECTION 6 5 6)
(test "0" number->string 0)
(test "100" number->string 100)
(test "100" number->string 256 16)
(test 100 string->number "100")
(test 256 string->number "100" 16)
(test #f string->number "")
(test #f string->number ".")
(test #f string->number "d")
(test #f string->number "D")
(test #f string->number "i")
(test #f string->number "I")
(test #f string->number "3i")
(test #f string->number "3I")
(test #f string->number "33i")
(test #f string->number "33I")
(test #f string->number "3.3i")
(test #f string->number "3.3I")
(test #f string->number "-")
(test #f string->number "+")

(SECTION 6 6)
(test #t eqv? '#\  #\Space)
(test #t eqv? #\space '#\Space)
(test #t char? #\a)
(test #t char? #\()
(test #t char? #\ )
(test #t char? '#\newline)

(test #f char=? #\A #\B)
(test #f char=? #\a #\b)
(test #f char=? #\9 #\0)
(test #t char=? #\A #\A)

(test #t char<? #\A #\B)
(test #t char<? #\a #\b)
(test #f char<? #\9 #\0)
(test #f char<? #\A #\A)

(test #f char>? #\A #\B)
(test #f char>? #\a #\b)
(test #t char>? #\9 #\0)
(test #f char>? #\A #\A)

(test #t char<=? #\A #\B)
(test #t char<=? #\a #\b)
(test #f char<=? #\9 #\0)
(test #t char<=? #\A #\A)

(test #f char>=? #\A #\B)
(test #f char>=? #\a #\b)
(test #t char>=? #\9 #\0)
(test #t char>=? #\A #\A)

(test #f char-ci=? #\A #\B)
(test #f char-ci=? #\a #\B)
(test #f char-ci=? #\A #\b)
(test #f char-ci=? #\a #\b)
(test #f char-ci=? #\9 #\0)
(test #t char-ci=? #\A #\A)
(test #t char-ci=? #\A #\a)

(test #t char-ci<? #\A #\B)
(test #t char-ci<? #\a #\B)
(test #t char-ci<? #\A #\b)
(test #t char-ci<? #\a #\b)
(test #f char-ci<? #\9 #\0)
(test #f char-ci<? #\A #\A)
(test #f char-ci<? #\A #\a)

(test #f char-ci>? #\A #\B)
(test #f char-ci>? #\a #\B)
(test #f char-ci>? #\A #\b)
(test #f char-ci>? #\a #\b)
(test #t char-ci>? #\9 #\0)
(test #f char-ci>? #\A #\A)
(test #f char-ci>? #\A #\a)

(test #t char-ci<=? #\A #\B)
(test #t char-ci<=? #\a #\B)
(test #t char-ci<=? #\A #\b)
(test #t char-ci<=? #\a #\b)
(test #f char-ci<=? #\9 #\0)
(test #t char-ci<=? #\A #\A)
(test #t char-ci<=? #\A #\a)

(test #f char-ci>=? #\A #\B)
(test #f char-ci>=? #\a #\B)
(test #f char-ci>=? #\A #\b)
(test #f char-ci>=? #\a #\b)
(test #t char-ci>=? #\9 #\0)
(test #t char-ci>=? #\A #\A)
(test #t char-ci>=? #\A #\a)

(test #t char-alphabetic? #\a)
(test #t char-alphabetic? #\A)
(test #t char-alphabetic? #\z)
(test #t char-alphabetic? #\Z)
(test #f char-alphabetic? #\0)
(test #f char-alphabetic? #\9)
(test #f char-alphabetic? #\space)
(test #f char-alphabetic? #\;)

(test #f char-numeric? #\a)
(test #f char-numeric? #\A)
(test #f char-numeric? #\z)
(test #f char-numeric? #\Z)
(test #t char-numeric? #\0)
(test #t char-numeric? #\9)
(test #f char-numeric? #\space)
(test #f char-numeric? #\;)

(test #f char-whitespace? #\a)
(test #f char-whitespace? #\A)
(test #f char-whitespace? #\z)
(test #f char-whitespace? #\Z)
(test #f char-whitespace? #\0)
(test #f char-whitespace? #\9)
(test #t char-whitespace? #\space)
(test #f char-whitespace? #\;)

(test #f char-upper-case? #\0)
(test #f char-upper-case? #\9)
(test #f char-upper-case? #\space)
(test #f char-upper-case? #\;)

(test #f char-lower-case? #\0)
(test #f char-lower-case? #\9)
(test #f char-lower-case? #\space)
(test #f char-lower-case? #\;)

(test #\. integer->char (char->integer #\.))
(test #\A integer->char (char->integer #\A))
(test #\a integer->char (char->integer #\a))
(test #\A char-upcase #\A)
(test #\A char-upcase #\a)
(test #\a char-downcase #\A)
(test #\a char-downcase #\a)
(SECTION 6 7)
(test #t string? "The word \"recursion\\\" has many meanings.")
(test #t string? "")
(define f (make-string 3 #\*))
(test "?**" 'string-set! (begin (string-set! f 0 #\?) f))
(test "abc" string #\a #\b #\c)
(test "" string)
(test 3 string-length "abc")
(test #\a string-ref "abc" 0)
(test #\c string-ref "abc" 2)
(test 0 string-length "")
(test "" substring "ab" 0 0)
(test "" substring "ab" 1 1)
(test "" substring "ab" 2 2)
(test "a" substring "ab" 0 1)
(test "b" substring "ab" 1 2)
(test "ab" substring "ab" 0 2)
(test "foobar" string-append "foo" "bar")
(test "foo" string-append "foo")
(test "foo" string-append "foo" "")
(test "foo" string-append "" "foo")
(test "" string-append)
(test "" make-string 0)
(test #t string=? "" "")
(test #f string<? "" "")
(test #f string>? "" "")
(test #t string<=? "" "")
(test #t string>=? "" "")
(test #t string-ci=? "" "")
(test #f string-ci<? "" "")
(test #f string-ci>? "" "")
(test #t string-ci<=? "" "")
(test #t string-ci>=? "" "")

(test #f string=? "A" "B")
(test #f string=? "a" "b")
(test #f string=? "9" "0")
(test #t string=? "A" "A")

(test #t string<? "A" "B")
(test #t string<? "a" "b")
(test #f string<? "9" "0")
(test #f string<? "A" "A")

(test #f string>? "A" "B")
(test #f string>? "a" "b")
(test #t string>? "9" "0")
(test #f string>? "A" "A")

(test #t string<=? "A" "B")
(test #t string<=? "a" "b")
(test #f string<=? "9" "0")
(test #t string<=? "A" "A")

(test #f string>=? "A" "B")
(test #f string>=? "a" "b")
(test #t string>=? "9" "0")
(test #t string>=? "A" "A")

(test #f string-ci=? "A" "B")
(test #f string-ci=? "a" "B")
(test #f string-ci=? "A" "b")
(test #f string-ci=? "a" "b")
(test #f string-ci=? "9" "0")
(test #t string-ci=? "A" "A")
(test #t string-ci=? "A" "a")

(test #t string-ci<? "A" "B")
(test #t string-ci<? "a" "B")
(test #t string-ci<? "A" "b")
(test #t string-ci<? "a" "b")
(test #f string-ci<? "9" "0")
(test #f string-ci<? "A" "A")
(test #f string-ci<? "A" "a")

(test #f string-ci>? "A" "B")
(test #f string-ci>? "a" "B")
(test #f string-ci>? "A" "b")
(test #f string-ci>? "a" "b")
(test #t string-ci>? "9" "0")
(test #f string-ci>? "A" "A")
(test #f string-ci>? "A" "a")

(test #t string-ci<=? "A" "B")
(test #t string-ci<=? "a" "B")
(test #t string-ci<=? "A" "b")
(test #t string-ci<=? "a" "b")
(test #f string-ci<=? "9" "0")
(test #t string-ci<=? "A" "A")
(test #t string-ci<=? "A" "a")

(test #f string-ci>=? "A" "B")
(test #f string-ci>=? "a" "B")
(test #f string-ci>=? "A" "b")
(test #f string-ci>=? "a" "b")
(test #t string-ci>=? "9" "0")
(test #t string-ci>=? "A" "A")
(test #t string-ci>=? "A" "a")
(SECTION 6 8)
(test #t vector? '#(0 (2 2 2 2) "Anna"))
(test #t vector? '#())
(test '#(a b c) vector 'a 'b 'c)
(test '#() vector)
(test 3 vector-length '#(0 (2 2 2 2) "Anna"))
(test 0 vector-length '#())
(test 8 vector-ref '#(1 1 2 3 5 8 13 21) 5)
(test '#(0 ("Sue" "Sue") "Anna") 'vector-set
	(let ((vec (vector 0 '(2 2 2 2) "Anna")))
	  (vector-set! vec 1 '("Sue" "Sue"))
	  vec))
(test '#(hi hi) make-vector 2 'hi)
(test '#() make-vector 0)
(test '#() make-vector 0 'a)
(SECTION 6 9)
(test #t procedure? car)
(test #f procedure? 'car)
(test #t procedure? (lambda (x) (* x x)))
(test #f procedure? '(lambda (x) (* x x)))
(test #t call-with-current-continuation procedure?)
(test 7 apply + (list 3 4))
(test 7 apply (lambda (a b) (+ a b)) (list 3 4))
(test 17 apply + 10 (list 3 4))
(test '() apply list '())
(define compose (lambda (f g) (lambda args (f (apply g args)))))
(test 30 (compose sqt *) 12 75)

(test '(b e h) map cadr '((a b) (d e) (g h)))
(test '(5 7 9) map + '(1 2 3) '(4 5 6))
(test '#(0 1 4 9 16) 'for-each
	(let ((v (make-vector 5)))
		(for-each (lambda (i) (vector-set! v i (* i i)))
			'(0 1 2 3 4))
		v))
(test -3 call-with-current-continuation
		(lambda (exit)
		 (for-each (lambda (x) (if (negative? x) (exit x)))
		 	'(54 0 37 -3 245 19))
		#t))
(define list-length
 (lambda (obj)
  (call-with-current-continuation
   (lambda (return)
    (letrec ((r (lambda (obj) (cond ((null? obj) 0)
				((pair? obj) (+ (r (cdr obj)) 1))
				(else (return #f))))))
	(r obj))))))
(test 4 list-length '(1 2 3 4))
(test #f list-length '(a b . c))
(test '() map cadr '())

;;; This tests full conformance of call-with-current-continuation.  It
;;; is a separate test because some schemes do not support call/cc
;;; other than escape procedures.  I am indebted to
;;; [email protected] (Raja Sooriamurthi) for fixing this
;;; code.  The function leaf-eq? compares the leaves of 2 arbitrary
;;; trees constructed of conses.  
(define (next-leaf-generator obj eot)
  (letrec ((return #f)
	   (cont (lambda (x)
		   (recur obj)
		   (set! cont (lambda (x) (return eot)))
		   (cont #f)))
	   (recur (lambda (obj)
		      (if (pair? obj)
			  (for-each recur obj)
			  (call-with-current-continuation
			   (lambda (c)
			     (set! cont c)
			     (return obj)))))))
    (lambda () (call-with-current-continuation
		(lambda (ret) (set! return ret) (cont #f))))))
(define (leaf-eq? x y)
  (let* ((eot (list 'eot))
	 (xf (next-leaf-generator x eot))
	 (yf (next-leaf-generator y eot)))
    (letrec ((loop (lambda (x y)
		     (cond ((not (eq? x y)) #f)
			   ((eq? eot x) #t)
			   (else (loop (xf) (yf)))))))
      (loop (xf) (yf)))))
(define (test-cont)
  (SECTION 6 9)
  (test #t leaf-eq? '(a (b (c))) '((a) b c))
  (test #f leaf-eq? '(a (b (c))) '((a) b c d))
  (report-errs))

;;; Test Optional R4RS DELAY syntax and FORCE procedure
(define (test-delay)
  (SECTION 6 9)
  (test 3 'delay (force (delay (+ 1 2))))
  (test '(3 3) 'delay (let ((p (delay (+ 1 2))))
			(list (force p) (force p))))
  (test 2 'delay (letrec ((a-stream
			   (letrec ((next (lambda (n)
					    (cons n (delay (next (+ n 1)))))))
			     (next 0)))
			  (head car)
			  (tail (lambda (stream) (force (cdr stream)))))
		   (head (tail (tail a-stream)))))
  (letrec ((count 0)
	   (p (delay (begin (set! count (+ count 1))
			    (if (> count x)
				count
				(force p)))))
	   (x 5))
    (test 6 force p)
    (set! x 10)
    (test 6 force p))
  (test 3 'force
	(letrec ((p (delay (if c 3 (begin (set! c #t) (+ (force p) 1)))))
		 (c #f))
	  (force p)))
  (report-errs))

(SECTION 6 10 1)
(test #t input-port? (current-input-port))
(test #t output-port? (current-output-port))
(test #t call-with-input-file (test-file-name "r4rs.test") input-port?)
(define this-file (open-input-file (test-file-name "r4rs.test")))
(test #t input-port? this-file)
(SECTION 6 10 2)
(test #\; peek-char this-file)
(test #\; read-char this-file)
(read this-file) ;; skip define-module expression
(test '(define cur-section '()) read this-file)
(test #\( peek-char this-file)
(test '(define errs '()) read this-file)
(close-input-port this-file)
(close-input-port this-file)
(define (check-test-file name)
  (define test-file (open-input-file name))
  (test #t 'input-port?
	(call-with-input-file
	    name
	  (lambda (test-file)
	    (test load-test-obj read test-file)
	    (test #t eof-object? (peek-char test-file))
	    (test #t eof-object? (read-char test-file))
	    (input-port? test-file))))
  (test #\; read-char test-file)
  (test display-test-obj read test-file)
  (test load-test-obj read test-file)
  (close-input-port test-file))
(SECTION 6 10 3)
(define write-test-obj
  '(#t #f #\a () 9739 -3 . #((test) "te \" \" st" "" test #() b c)))
(define display-test-obj
  '(#t #f a () 9739 -3 . #((test) te " " st test #() b c)))
(define load-test-obj
  (list 'define 'foo (list 'quote write-test-obj)))
(test #t call-with-output-file
      (data-file-name "tmp1")
      (lambda (test-file)
	(write-char #\; test-file)
	(display write-test-obj test-file)
	(newline test-file)
	(write load-test-obj test-file)
	(output-port? test-file)))
(check-test-file (data-file-name "tmp1"))

(define test-file (open-output-file (data-file-name "tmp2")))
(write-char #\; test-file)
(display write-test-obj test-file)
(newline test-file)
(write load-test-obj test-file)
(test #t output-port? test-file)
(close-output-port test-file)
(check-test-file (data-file-name "tmp2"))
(define (test-sc4)
  (SECTION 6 7)
  (test '(#\P #\space #\l) string->list "P l")
  (test '() string->list "")
  (test "1\\\"" list->string '(#\1 #\\ #\"))
  (test "" list->string '())
  (SECTION 6 8)
  (test '(dah dah didah) vector->list '#(dah dah didah))
  (test '() vector->list '#())
  (test '#(dididit dah) list->vector '(dididit dah))
  (test '#() list->vector '())
  (SECTION 6 10 4)
  (load (data-file-name "tmp1"))
  (test write-test-obj 'load foo)
  (report-errs))

(report-errs)
(if (and (string->number "0.0") (inexact? (string->number "0.0")))
    (test-inexact))

(let ((n (string->number "281474976710655")))
  (if (and n (exact? n))
      (test-bignum)))
(test-cont)
(test-sc4)
(test-delay)
"last item in file"

(delete-file (data-file-name "tmp1"))
(delete-file (data-file-name "tmp2"))
(delete-file (data-file-name "tmp3"))