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+;; Copyright (C) 1991, 1992, 1993, 1994, 1995 Free Software Foundation, Inc.
+;;
+;; This program is free software; you can redistribute it and/or modify it
+;; under the terms of the GNU General Public License as published by the
+;; Free Software Foundation; either version 2, or (at your option) any
+;; later version.
+;;
+;; This program 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 General Public License for more details.
+;;
+;; To receive a copy of the GNU General Public License, write to the
+;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+;; Boston, MA 02111-1307, USA; or view
+;; http://www-swiss.ai.mit.edu/~jaffer/GPL.html
+
+;;;; "r4rstest.scm" Test correctness of scheme implementations.
+;;; Author: Aubrey Jaffer
+
+;;; 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 "r4rstest.scm".
+;;; 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
+;;; "r4rstest.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 jaffer@ai.mit.edu
+
+(define cur-section '())(define errs '())
+(define SECTION (lambda args
+		  (display "SECTION") (write args) (newline)
+		  (set! cur-section args) #t))
+(define record-error (lambda (e) (set! errs (cons (list cur-section e) errs))))
+
+(define test
+  (lambda (expect fun . args)
+    (write (cons fun args))
+    (display "  ==> ")
+    ((lambda (res)
+      (write res)
+      (newline)
+      (cond ((not (equal? expect res))
+	     (record-error (list res expect (cons fun args)))
+	     (display " BUT EXPECTED ")
+	     (write expect)
+	     (newline)
+	     #f)
+	    (else #t)))
+     (if (procedure? fun) (apply fun args) (car args)))))
+(define (report-errs)
+  (newline)
+  (if (null? errs) (display "Passed all tests")
+      (begin
+	(display "errors were:")
+	(newline)
+	(display "(SECTION (got expected (call)))")
+	(newline)
+	(for-each (lambda (l) (write l) (newline))
+		  errs)))
+  (newline))
+
+(SECTION 2 1);; test that all symbol characters are supported.
+'(+ - ... !.. $.+ %.- &.! *.: /:. :+. <-. =. >. ?. ~. _. ^.)
+
+(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) record-error "test" "" 'test '#() '#(a b c) ))
+(define i 1)
+(for-each (lambda (x) (display (make-string i #\ ))
+		  (set! i (+ 3 i))
+		  (write x)
+		  (newline))
+	  disjoint-type-functions)
+(define type-matrix
+  (map (lambda (x)
+	 (let ((t (map (lambda (f) (f x)) disjoint-type-functions)))
+	   (write t)
+	   (write x)
+	   (newline)
+	   t))
+       type-examples))
+(set! i 0)
+(define j 0)
+(for-each (lambda (x y)
+	    (set! j (+ 1 j))
+	    (set! i 0)
+	    (for-each (lambda (f)
+			(set! i (+ 1 i))
+			(cond ((and (= i j))
+			       (cond ((not (f x))) (test #t f x)))
+			      ((f x) (test #f f x)))
+			(cond ((and (= i j))
+			       (cond ((not (f y))) (test #t f y)))
+			      ((f y) (test #f f y))))
+		      disjoint-type-functions))
+	  (list #t #\a '() 9739 '(test) record-error "test" 'car '#(a b c))
+	  (list #f #\newline '() -3252 '(t . t) car "" 'nil '#()))
+(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)))
+(define old-+ +)
+(define + (lambda (x y) (list y x)))
+(test '(3 6) add3 6)
+(set! + old-+)
+(test 9 add3 6)
+(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))
+(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)))))
+(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"))
+(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")
+
+(test #t eq? 'mISSISSIppi 'mississippi)
+(test #f 'string->symbol (eq? 'bitBlt (string->symbol "bitBlt")))
+(test 'JollyWog string->symbol (symbol->string 'JollyWog))
+
+(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: fred@sce.carleton.ca (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)
+  (newline)
+  (display ";testing inexact numbers; ")
+  (newline)
+  (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
+      "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 "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)))))
+  (newline)
+  (display ";testing bignums; ")
+  (newline)
+  (SECTION 6 5 5)
+  (test 0 modulo 3333333333 3)
+  (test 0 modulo 3333333333 -3)
+  (test 0 remainder 3333333333 3)
+  (test 0 remainder 3333333333 -3)
+  (test 2 modulo 3333333332 3)
+  (test -1 modulo 3333333332 -3)
+  (test 2 remainder 3333333332 3)
+  (test 2 remainder 3333333332 -3)
+  (test 1 modulo -3333333332 3)
+  (test -2 modulo -3333333332 -3)
+  (test -2 remainder -3333333332 3)
+  (test -2 remainder -3333333332 -3)
+
+  (test 3 modulo 3 3333333333)
+  (test 3333333330 modulo -3 3333333333)
+  (test 3 remainder 3 3333333333)
+  (test -3 remainder -3 3333333333)
+  (test -3333333330 modulo 3 -3333333333)
+  (test -3 modulo -3 -3333333333)
+  (test 3 remainder 3 -3333333333)
+  (test -3 remainder -3 -3333333333)
+
+  (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
+;;; raja@copper.ucs.indiana.edu (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)
+  (newline)
+  (display ";testing continuations; ")
+  (newline)
+  (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)
+  (newline)
+  (display ";testing DELAY and FORCE; ")
+  (newline)
+  (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 "r4rstest.scm" input-port?)
+(define this-file (open-input-file "r4rstest.scm"))
+(test #t input-port? this-file)
+(SECTION 6 10 2)
+(test #\; peek-char this-file)
+(test #\; read-char this-file)
+(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
+      "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 "tmp1")
+
+(define test-file (open-output-file "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 "tmp2")
+(define (test-sc4)
+  (newline)
+  (display ";testing scheme 4 functions; ")
+  (newline)
+  (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 "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)))
+(newline)
+(display "To fully test continuations, Scheme 4, and DELAY/FORCE do:")
+(newline)
+(display "(test-cont) (test-sc4) (test-delay)")
+(newline)
+"last item in file"