Merge pull request #943 from ekaitz-zarraga/master

Add srfi-64

3 files changed, 828 insertions, 0 deletions

diff --git a/doc/chibi.scrbl b/doc/chibi.scrbl
index 2b1e8d57..943d159e 100755
--- a/doc/chibi.scrbl
+++ b/doc/chibi.scrbl
@@ -1263,6 +1263,7 @@ snow-fort):
 \item{\hyperlink["http://srfi.schemers.org/srfi-46/srfi-46.html"]{(srfi 46) - basic syntax-rules extensions}}
 \item{\hyperlink["http://srfi.schemers.org/srfi-55/srfi-55.html"]{(srfi 55) - require-extension}}
 \item{\hyperlink["http://srfi.schemers.org/srfi-62/srfi-62.html"]{(srfi 62) - s-expression comments}}
+\item{\hyperlink["http://srfi.schemers.org/srfi-64/srfi-64.html"]{(srfi 64) - a scheme API for test suites}}
 \item{\hyperlink["http://srfi.schemers.org/srfi-69/srfi-69.html"]{(srfi 69) - basic hash tables}}
 \item{\hyperlink["http://srfi.schemers.org/srfi-95/srfi-95.html"]{(srfi 95) - sorting and merging}}
 \item{\hyperlink["http://srfi.schemers.org/srfi-98/srfi-98.html"]{(srfi 98) - environment access}}
diff --git a/lib/srfi/64.scm b/lib/srfi/64.scm
new file mode 100644
index 00000000..8aec4a73
--- /dev/null
+++ b/lib/srfi/64.scm
@@ -0,0 +1,789 @@
+;; Copyright (c) 2005, 2006, 2007, 2012, 2013 Per Bothner
+;; Added "full" support for Chicken, Gauche, Guile and SISC.
+;;   Alex Shinn, Copyright (c) 2005.
+;; Modified for Scheme Spheres by Álvaro Castro-Castilla, Copyright (c) 2012.
+;; Support for Guile 2 by Mark H Weaver <mhw@netris.org>, Copyright (c) 2014.
+;; Modified for Chibi-Scheme by Ekaitz Zarraga Copyright (c) 2023.
+;;
+;; Permission is hereby granted, free of charge, to any person
+;; obtaining a copy of this software and associated documentation
+;; files (the "Software"), to deal in the Software without
+;; restriction, including without limitation the rights to use, copy,
+;; modify, merge, publish, distribute, sublicense, and/or sell copies
+;; of the Software, and to permit persons to whom the Software is
+;; furnished to do so, subject to the following conditions:
+;;
+;; The above copyright notice and this permission notice shall be
+;; included in all copies or substantial portions of the Software.
+;;
+;; THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+;; EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+;; MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+;; NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+;; BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+;; ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+;; CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+;; SOFTWARE.
+
+(define-syntax %test-export
+  (syntax-rules ()
+    ((%test-export . names) (if #f #f))))
+
+(cond-expand
+ (srfi-9
+  (define-syntax %test-record-define
+    (syntax-rules ()
+      ((%test-record-define tname alloc runner? (name index getter setter) ...)
+       (define-record-type tname
+	 (alloc)
+	 runner?
+	 (name getter setter) ...)))))
+ (else
+  (define %test-runner-cookie (list "test-runner"))
+  (define-syntax %test-record-define
+    (syntax-rules ()
+      ((%test-record-define tname alloc runner? (name index getter setter) ...)
+       (begin
+	 (define (runner? obj)
+	   (and (vector? obj)
+		(> (vector-length obj) 1)
+		(eq (vector-ref obj 0) %test-runner-cookie)))
+	 (define (alloc)
+	   (let ((runner (make-vector 23)))
+	     (vector-set! runner 0 %test-runner-cookie)
+	     runner))
+	 (begin
+	   (define (getter runner)
+	     (vector-ref runner index)) ...)
+	 (begin
+	   (define (setter runner value)
+	     (vector-set! runner index value)) ...)))))))
+
+(%test-record-define test-runner
+ %test-runner-alloc test-runner?
+ ;; Cumulate count of all tests that have passed and were expected to.
+ (pass-count 1 test-runner-pass-count test-runner-pass-count!)
+ (fail-count 2 test-runner-fail-count test-runner-fail-count!)
+ (xpass-count 3 test-runner-xpass-count test-runner-xpass-count!)
+ (xfail-count 4 test-runner-xfail-count test-runner-xfail-count!)
+ (skip-count 5 test-runner-skip-count test-runner-skip-count!)
+ (skip-list 6 %test-runner-skip-list %test-runner-skip-list!)
+ (fail-list 7 %test-runner-fail-list %test-runner-fail-list!)
+ ;; Normally #t, except when in a test-apply.
+ (run-list 8 %test-runner-run-list %test-runner-run-list!)
+ (skip-save 9 %test-runner-skip-save %test-runner-skip-save!)
+ (fail-save 10 %test-runner-fail-save %test-runner-fail-save!)
+ (group-stack 11 test-runner-group-stack test-runner-group-stack!)
+ (on-test-begin 12 test-runner-on-test-begin test-runner-on-test-begin!)
+ (on-test-end 13 test-runner-on-test-end test-runner-on-test-end!)
+ ;; Call-back when entering a group. Takes (runner suite-name count).
+ (on-group-begin 14 test-runner-on-group-begin test-runner-on-group-begin!)
+ ;; Call-back when leaving a group.
+ (on-group-end 15 test-runner-on-group-end test-runner-on-group-end!)
+ ;; Call-back when leaving the outermost group.
+ (on-final 16 test-runner-on-final test-runner-on-final!)
+ ;; Call-back when expected number of tests was wrong.
+ (on-bad-count 17 test-runner-on-bad-count test-runner-on-bad-count!)
+ ;; Call-back when name in test=end doesn't match test-begin.
+ (on-bad-end-name 18 test-runner-on-bad-end-name test-runner-on-bad-end-name!)
+ ;; Cumulate count of all tests that have been done.
+ (total-count 19 %test-runner-total-count %test-runner-total-count!)
+ ;; Stack (list) of (count-at-start . expected-count):
+ (count-list 20 %test-runner-count-list %test-runner-count-list!)
+ (result-alist 21 test-result-alist test-result-alist!)
+ ;; Field can be used by test-runner for any purpose.
+ ;; test-runner-simple uses it for a log file.
+ (aux-value 22 test-runner-aux-value test-runner-aux-value!)
+)
+
+(define (test-runner-reset runner)
+  (test-result-alist! runner '())
+  (test-runner-pass-count! runner 0)
+  (test-runner-fail-count! runner 0)
+  (test-runner-xpass-count! runner 0)
+  (test-runner-xfail-count! runner 0)
+  (test-runner-skip-count! runner 0)
+  (%test-runner-total-count! runner 0)
+  (%test-runner-count-list! runner '())
+  (%test-runner-run-list! runner #t)
+  (%test-runner-skip-list! runner '())
+  (%test-runner-fail-list! runner '())
+  (%test-runner-skip-save! runner '())
+  (%test-runner-fail-save! runner '())
+  (test-runner-group-stack! runner '()))
+
+(define (test-runner-group-path runner)
+  (reverse (test-runner-group-stack runner)))
+
+(define (%test-null-callback runner) #f)
+
+(define (test-runner-null)
+  (let ((runner (%test-runner-alloc)))
+    (test-runner-reset runner)
+    (test-runner-on-group-begin! runner (lambda (runner name count) #f))
+    (test-runner-on-group-end! runner %test-null-callback)
+    (test-runner-on-final! runner %test-null-callback)
+    (test-runner-on-test-begin! runner %test-null-callback)
+    (test-runner-on-test-end! runner %test-null-callback)
+    (test-runner-on-bad-count! runner (lambda (runner count expected) #f))
+    (test-runner-on-bad-end-name! runner (lambda (runner begin end) #f))
+    runner))
+
+;; Not part of the specification.  FIXME
+;; Controls whether a log file is generated.
+(define test-log-to-file #t)
+
+(define (test-runner-simple)
+  (let ((runner (%test-runner-alloc)))
+    (test-runner-reset runner)
+    (test-runner-on-group-begin! runner test-on-group-begin-simple)
+    (test-runner-on-group-end! runner test-on-group-end-simple)
+    (test-runner-on-final! runner test-on-final-simple)
+    (test-runner-on-test-begin! runner test-on-test-begin-simple)
+    (test-runner-on-test-end! runner test-on-test-end-simple)
+    (test-runner-on-bad-count! runner test-on-bad-count-simple)
+    (test-runner-on-bad-end-name! runner test-on-bad-end-name-simple)
+    runner))
+
+(cond-expand
+ (srfi-39
+  (define test-runner-current (make-parameter #f))
+  (define test-runner-factory (make-parameter test-runner-simple)))
+ (else
+  (define %test-runner-current #f)
+  (define-syntax test-runner-current
+    (syntax-rules ()
+      ((test-runner-current)
+       %test-runner-current)
+      ((test-runner-current runner)
+       (set! %test-runner-current runner))))
+  (define %test-runner-factory test-runner-simple)
+  (define-syntax test-runner-factory
+    (syntax-rules ()
+      ((test-runner-factory)
+       %test-runner-factory)
+      ((test-runner-factory runner)
+       (set! %test-runner-factory runner))))))
+
+;; A safer wrapper to test-runner-current.
+(define (test-runner-get)
+  (let ((r (test-runner-current)))
+    (if (not r)
+        (cond-expand
+         (srfi-23 (error "test-runner not initialized - test-begin missing?"))
+         (else #t)))
+      r))
+
+(define (%test-specifier-matches spec runner)
+  (spec runner))
+
+(define (test-runner-create)
+  ((test-runner-factory)))
+
+(define (%test-any-specifier-matches list runner)
+  (let ((result #f))
+    (let loop ((l list))
+      (cond ((null? l) result)
+	    (else
+	     (if (%test-specifier-matches (car l) runner)
+		 (set! result #t))
+	     (loop (cdr l)))))))
+
+;; Returns #f, #t, or 'xfail.
+(define (%test-should-execute runner)
+  (let ((run (%test-runner-run-list runner)))
+    (cond ((or
+	    (not (or (eqv? run #t)
+		     (%test-any-specifier-matches run runner)))
+	    (%test-any-specifier-matches
+	     (%test-runner-skip-list runner)
+	     runner))
+	    (test-result-set! runner 'result-kind 'skip)
+	    #f)
+	  ((%test-any-specifier-matches
+	    (%test-runner-fail-list runner)
+	    runner)
+	   (test-result-set! runner 'result-kind 'xfail)
+	   'xfail)
+	  (else #t))))
+
+(define (%test-begin suite-name count)
+  (if (not (test-runner-current))
+      (let ((r (test-runner-create)))
+	(test-runner-current r)
+	(test-runner-on-final! r
+	  (let ((old-final (test-runner-on-final r)))
+	    (lambda (r) (old-final r) (test-runner-current #f))))))
+  (let ((runner (test-runner-current)))
+    ((test-runner-on-group-begin runner) runner suite-name count)
+    (%test-runner-skip-save! runner
+			       (cons (%test-runner-skip-list runner)
+				     (%test-runner-skip-save runner)))
+    (%test-runner-fail-save! runner
+			       (cons (%test-runner-fail-list runner)
+				     (%test-runner-fail-save runner)))
+    (%test-runner-count-list! runner
+			     (cons (cons (%test-runner-total-count runner)
+					 count)
+				   (%test-runner-count-list runner)))
+    (test-runner-group-stack! runner (cons suite-name
+					(test-runner-group-stack runner)))))
+(define-syntax test-begin
+  (syntax-rules ()
+    ((test-begin suite-name)
+     (%test-begin suite-name #f))
+    ((test-begin suite-name count)
+     (%test-begin suite-name count))))
+
+(define (test-on-group-begin-simple runner suite-name count)
+  (if (null? (test-runner-group-stack runner))
+      (begin
+	(display "%%%% Starting test ")
+	(display suite-name)
+	(if test-log-to-file
+	    (let* ((log-name (if (string? test-log-to-file) test-log-to-file
+                                 (string-append suite-name ".log")))
+                   ;; Replace "bad" characters in log file name with #\_
+                   (fix-invalid-char
+                    (lambda (ch)
+                      (if (or (char-alphabetic? ch)
+                              (char-numeric? ch)
+                              (char=? ch #\space)
+                              (char=? ch #\-)
+                              (char=? ch #\+)
+                              (char=? ch #\_)
+                              (char=? ch #\.)
+                              (char=? ch #\,))
+                          ch
+                          #\_)))
+                   (log-file-name
+                    (cond-expand (r7rs
+                                  (string-map fix-invalid-char log-name))
+                                 (else
+                                  (let ((t (string-copy log-name))
+                                        (tlen (string-length log-name)))
+                                    (do ((i 0 (+ i 1))) ((>= i tlen) t)
+                                      (string-set! t i (fix-invalid-char
+                                                        (string-ref t i))))))))
+		   (log-file
+				 (open-output-file log-file-name)))
+	      (display "%%%% Starting test " log-file)
+	      (display suite-name log-file)
+	      (newline log-file)
+	      (test-runner-aux-value! runner log-file)
+	      (display "  (Writing full log to \"")
+	      (display log-file-name)
+	      (display "\")")))
+	(newline)))
+  (let ((log (test-runner-aux-value runner)))
+    (if (output-port? log)
+	(begin
+	  (display "Group begin: " log)
+	  (display suite-name log)
+	  (newline log))))
+  #f)
+
+(define (test-on-group-end-simple runner)
+  (let ((log (test-runner-aux-value runner)))
+    (if (output-port? log)
+	(begin
+	  (display "Group end: " log)
+	  (display (car (test-runner-group-stack runner)) log)
+	  (newline log))))
+  #f)
+
+(define (%test-on-bad-count-write runner count expected-count port)
+  (display "*** Total number of tests was " port)
+  (display count port)
+  (display " but should be " port)
+  (display expected-count port)
+  (display ". ***" port)
+  (newline port)
+  (display "*** Discrepancy indicates testsuite error or exceptions. ***" port)
+  (newline port))
+
+(define (test-on-bad-count-simple runner count expected-count)
+  (%test-on-bad-count-write runner count expected-count (current-output-port))
+  (let ((log (test-runner-aux-value runner)))
+    (if (output-port? log)
+	(%test-on-bad-count-write runner count expected-count log))))
+
+(define (test-on-bad-end-name-simple runner begin-name end-name)
+  (let ((msg (string-append (%test-format-line runner) "test-end " begin-name
+			    " does not match test-begin " end-name)))
+    (cond-expand
+     (srfi-23 (error msg))
+     (else (display msg) (newline)))))
+
+
+(define (%test-final-report1 value label port)
+  (if (> value 0)
+      (begin
+	(display label port)
+	(display value port)
+	(newline port))))
+
+(define (%test-final-report-simple runner port)
+  (%test-final-report1 (test-runner-pass-count runner)
+		      "# of expected passes      " port)
+  (%test-final-report1 (test-runner-xfail-count runner)
+		      "# of expected failures    " port)
+  (%test-final-report1 (test-runner-xpass-count runner)
+		      "# of unexpected successes " port)
+  (%test-final-report1 (test-runner-fail-count runner)
+		      "# of unexpected failures  " port)
+  (%test-final-report1 (test-runner-skip-count runner)
+		      "# of skipped tests        " port))
+
+(define (test-on-final-simple runner)
+  (%test-final-report-simple runner (current-output-port))
+  (let ((log (test-runner-aux-value runner)))
+    (if (output-port? log)
+	(%test-final-report-simple runner log))))
+
+(define (%test-format-line runner)
+   (let* ((line-info (test-result-alist runner))
+	  (source-file (assq 'source-file line-info))
+	  (source-line (assq 'source-line line-info))
+	  (file (if source-file (cdr source-file) "")))
+     (if source-line
+	 (string-append file ":"
+			(number->string (cdr source-line)) ": ")
+	 "")))
+
+(define (%test-end suite-name line-info)
+  (let* ((r (test-runner-get))
+	 (groups (test-runner-group-stack r))
+	 (line (%test-format-line r)))
+    (test-result-alist! r line-info)
+    (if (null? groups)
+	(let ((msg (string-append line "test-end not in a group")))
+	  (cond-expand
+	   (srfi-23 (error msg))
+	   (else (display msg) (newline)))))
+    (if (and suite-name (not (equal? suite-name (car groups))))
+	((test-runner-on-bad-end-name r) r suite-name (car groups)))
+    (let* ((count-list (%test-runner-count-list r))
+	   (expected-count (cdar count-list))
+	   (saved-count (caar count-list))
+	   (group-count (- (%test-runner-total-count r) saved-count)))
+      (if (and expected-count
+	       (not (= expected-count group-count)))
+	  ((test-runner-on-bad-count r) r group-count expected-count))
+      ((test-runner-on-group-end r) r)
+      (test-runner-group-stack! r (cdr (test-runner-group-stack r)))
+      (%test-runner-skip-list! r (car (%test-runner-skip-save r)))
+      (%test-runner-skip-save! r (cdr (%test-runner-skip-save r)))
+      (%test-runner-fail-list! r (car (%test-runner-fail-save r)))
+      (%test-runner-fail-save! r (cdr (%test-runner-fail-save r)))
+      (%test-runner-count-list! r (cdr count-list))
+      (if (null? (test-runner-group-stack r))
+	  ((test-runner-on-final r) r)))))
+
+(define-syntax test-group
+  (syntax-rules ()
+    ((test-group suite-name . body)
+     (let ((r (or (test-runner-current)
+                  (begin
+                   (test-runner-current (test-runner-create))
+                   (test-runner-current)))))
+       ;; Ideally should also set line-number, if available.
+       (test-result-alist! r (list (cons 'test-name suite-name)))
+       (if (%test-should-execute r)
+	   (dynamic-wind
+	       (lambda () (test-begin suite-name))
+	       (lambda () . body)
+	       (lambda () (test-end  suite-name))))))))
+
+(define-syntax test-group-with-cleanup
+  (syntax-rules ()
+    ((test-group-with-cleanup suite-name form cleanup-form)
+     (test-group suite-name
+		    (dynamic-wind
+			(lambda () #f)
+			(lambda () form)
+			(lambda () cleanup-form))))
+    ((test-group-with-cleanup suite-name cleanup-form)
+     (test-group-with-cleanup suite-name #f cleanup-form))
+    ((test-group-with-cleanup suite-name form1 form2 form3 . rest)
+     (test-group-with-cleanup suite-name (begin form1 form2) form3 . rest))))
+
+(define (test-on-test-begin-simple runner)
+ (let ((log (test-runner-aux-value runner)))
+    (if (output-port? log)
+	(let* ((results (test-result-alist runner))
+	       (source-file (assq 'source-file results))
+	       (source-line (assq 'source-line results))
+	       (source-form (assq 'source-form results))
+	       (test-name (assq 'test-name results)))
+	  (display "Test begin:" log)
+	  (newline log)
+	  (if test-name (%test-write-result1 test-name log))
+	  (if source-file (%test-write-result1 source-file log))
+	  (if source-line (%test-write-result1 source-line log))
+	  (if source-form (%test-write-result1 source-form log))))))
+
+(define-syntax test-result-ref
+  (syntax-rules ()
+    ((test-result-ref runner pname)
+     (test-result-ref runner pname #f))
+    ((test-result-ref runner pname default)
+     (let ((p (assq pname (test-result-alist runner))))
+       (if p (cdr p) default)))))
+
+(define (test-on-test-end-simple runner)
+  (let ((log (test-runner-aux-value runner))
+	(kind (test-result-ref runner 'result-kind)))
+    (if (memq kind '(fail xpass))
+	(let* ((results (test-result-alist runner))
+	       (source-file (assq 'source-file results))
+	       (source-line (assq 'source-line results))
+	       (test-name (assq 'test-name results)))
+	  (if (or source-file source-line)
+	      (begin
+		(if source-file (display (cdr source-file)))
+		(display ":")
+		(if source-line (display (cdr source-line)))
+		(display ": ")))
+	  (display (if (eq? kind 'xpass) "XPASS" "FAIL"))
+	  (if test-name
+	      (begin
+		(display " ")
+		(display (cdr test-name))))
+	  (newline)))
+    (if (output-port? log)
+	(begin
+	  (display "Test end:" log)
+	  (newline log)
+	  (let loop ((list (test-result-alist runner)))
+	    (if (pair? list)
+		(let ((pair (car list)))
+		  ;; Write out properties not written out by on-test-begin.
+		  (if (not (memq (car pair)
+				 '(test-name source-file source-line source-form)))
+		      (%test-write-result1 pair log))
+		  (loop (cdr list)))))))))
+
+(define (%test-write-result1 pair port)
+  (display "  " port)
+  (display (car pair) port)
+  (display ": " port)
+  (write (cdr pair) port)
+  (newline port))
+
+(define (test-result-set! runner pname value)
+  (let* ((alist (test-result-alist runner))
+	 (p (assq pname alist)))
+    (if p
+	(set-cdr! p value)
+	(test-result-alist! runner (cons (cons pname value) alist)))))
+
+(define (test-result-actual-value! runner value)
+  (test-result-set! runner 'actual-value value))
+
+(define (test-result-expected-value! runner value)
+  (test-result-set! runner 'expected-value value))
+
+(define (test-result-clear runner)
+  (test-result-alist! runner '()))
+
+(define (test-result-remove runner pname)
+  (let* ((alist (test-result-alist runner))
+	 (p (assq pname alist)))
+    (if p
+	(test-result-alist! runner
+				   (let loop ((r alist))
+				     (if (eq? r p) (cdr r)
+					 (cons (car r) (loop (cdr r)))))))))
+
+(define (test-result-kind . rest)
+  (let ((runner (if (pair? rest) (car rest) (test-runner-current))))
+    (test-result-ref runner 'result-kind)))
+
+(define (test-passed? . rest)
+  (let ((runner (if (pair? rest) (car rest) (test-runner-get))))
+    (memq (test-result-ref runner 'result-kind) '(pass xpass))))
+
+(define (%test-report-result)
+  (let* ((r (test-runner-get))
+	 (result-kind (test-result-kind r)))
+    (case result-kind
+      ((pass)
+       (test-runner-pass-count! r (+ 1 (test-runner-pass-count r))))
+      ((fail)
+       (test-runner-fail-count!	r (+ 1 (test-runner-fail-count r))))
+      ((xpass)
+       (test-runner-xpass-count! r (+ 1 (test-runner-xpass-count r))))
+      ((xfail)
+       (test-runner-xfail-count! r (+ 1 (test-runner-xfail-count r))))
+      (else
+       (test-runner-skip-count! r (+ 1 (test-runner-skip-count r)))))
+    (%test-runner-total-count! r (+ 1 (%test-runner-total-count r)))
+    ((test-runner-on-test-end r) r)))
+
+(cond-expand
+ (srfi-34
+  (define-syntax %test-evaluate-with-catch
+    (syntax-rules ()
+      ((%test-evaluate-with-catch test-expression)
+       (guard (err (else #f)) test-expression)))))
+ (else
+  (define-syntax %test-evaluate-with-catch
+    (syntax-rules ()
+      ((%test-evaluate-with-catch test-expression)
+       test-expression)))))
+
+(define (%test-source-line2 form)
+  '())
+
+(define (%test-on-test-begin r)
+  (%test-should-execute r)
+  ((test-runner-on-test-begin r) r)
+  (not (eq? 'skip (test-result-ref r 'result-kind))))
+
+(define (%test-on-test-end r result)
+    (test-result-set! r 'result-kind
+		      (if (eq? (test-result-ref r 'result-kind) 'xfail)
+			  (if result 'xpass 'xfail)
+			  (if result 'pass 'fail))))
+
+(define (test-runner-test-name runner)
+  (test-result-ref runner 'test-name ""))
+
+(define-syntax %test-comp2body
+  (syntax-rules ()
+		((%test-comp2body r comp expected expr)
+		 (let ()
+		   (if (%test-on-test-begin r)
+		       (let ((exp expected))
+			 (test-result-expected-value! r exp)
+			 (let ((res (%test-evaluate-with-catch expr)))
+			   (test-result-actual-value! r res)
+			   (%test-on-test-end r (comp exp res)))))
+		   (%test-report-result)))))
+
+(define (%test-approximate= error)
+  (lambda (value expected)
+    (let ((rval (real-part value))
+          (ival (imag-part value))
+          (rexp (real-part expected))
+          (iexp (imag-part expected)))
+      (and (>= rval (- rexp error))
+           (>= ival (- iexp error))
+           (<= rval (+ rexp error))
+           (<= ival (+ iexp error))))))
+
+(define-syntax %test-comp1body
+  (syntax-rules ()
+    ((%test-comp1body r expr)
+     (let ()
+       (if (%test-on-test-begin r)
+	   (let ()
+	     (let ((res (%test-evaluate-with-catch expr)))
+	       (test-result-actual-value! r res)
+	       (%test-on-test-end r res))))
+       (%test-report-result)))))
+
+
+
+(define-syntax test-end
+  (syntax-rules ()
+    ((test-end)
+     (%test-end #f '()))
+    ((test-end suite-name)
+     (%test-end suite-name '()))))
+(define-syntax test-assert
+  (syntax-rules ()
+    ((test-assert tname test-expression)
+     (let* ((r (test-runner-get))
+      (name tname))
+ (test-result-alist! r '((test-name . tname)))
+ (%test-comp1body r test-expression)))
+    ((test-assert test-expression)
+     (let* ((r (test-runner-get)))
+ (test-result-alist! r '())
+ (%test-comp1body r test-expression)))))
+(define-syntax %test-comp2
+  (syntax-rules ()
+    ((%test-comp2 comp tname expected expr)
+     (let* ((r (test-runner-get))
+      (name tname))
+ (test-result-alist! r (list (cons 'test-name tname)))
+ (%test-comp2body r comp expected expr)))
+    ((%test-comp2 comp expected expr)
+     (let* ((r (test-runner-get)))
+ (test-result-alist! r '())
+ (%test-comp2body r comp expected expr)))))
+(define-syntax test-equal
+  (syntax-rules ()
+    ((test-equal . rest)
+     (%test-comp2 equal? . rest))))
+(define-syntax test-eqv
+  (syntax-rules ()
+    ((test-eqv . rest)
+     (%test-comp2 eqv? . rest))))
+(define-syntax test-eq
+  (syntax-rules ()
+    ((test-eq . rest)
+     (%test-comp2 eq? . rest))))
+(define-syntax test-approximate
+  (syntax-rules ()
+    ((test-approximate tname expected expr error)
+     (%test-comp2 (%test-approximate= error) tname expected expr))
+    ((test-approximate expected expr error)
+     (%test-comp2 (%test-approximate= error) expected expr))))
+
+(cond-expand
+ ((and srfi-34 srfi-35)
+  (define-syntax %test-error
+    (syntax-rules ()
+      ((%test-error r etype expr)
+       (%test-comp1body r (guard (ex ((condition-type? etype)
+		   (and (condition? ex) (condition-has-type? ex etype)))
+		  ((procedure? etype)
+		   (etype ex))
+		  ((equal? etype #t)
+		   #t)
+		  (else #t))
+	      expr #f))))))
+ (srfi-34
+  (define-syntax %test-error
+    (syntax-rules ()
+      ((%test-error r etype expr)
+       (%test-comp1body r (guard (ex (else #t)) expr #f))))))
+ (else
+  (define-syntax %test-error
+    (syntax-rules ()
+      ((%test-error r etype expr)
+       (begin
+	 ((test-runner-on-test-begin r) r)
+	 (test-result-set! r 'result-kind 'skip)
+	 (%test-report-result)))))))
+
+(define-syntax test-error
+  (syntax-rules ()
+    ((test-error name etype expr)
+     (let ((r (test-runner-get)))
+       (test-result-alist! r `((test-name . ,name)))
+       (%test-error r etype expr)))
+    ((test-error etype expr)
+     (let ((r (test-runner-get)))
+       (test-result-alist! r '())
+       (%test-error r etype expr)))
+    ((test-error expr)
+     (let ((r (test-runner-get)))
+       (test-result-alist! r '())
+       (%test-error r #t expr)))))
+
+(define-syntax test-with-runner
+  (syntax-rules ()
+    ((test-with-runner runner form ...)
+     (let ((saved-runner (test-runner-current)))
+       (dynamic-wind
+           (lambda () (test-runner-current runner))
+           (lambda () form ...)
+           (lambda () (test-runner-current saved-runner)))))))
+
+(define (test-apply first . rest)
+  (if (test-runner? first)
+      (test-with-runner first (apply test-apply rest))
+      (let ((r (test-runner-current)))
+	(if r
+	    (let ((run-list (%test-runner-run-list r)))
+	      (cond ((null? rest)
+		     (%test-runner-run-list! r (reverse run-list))
+		     (first)) ;; actually apply procedure thunk
+		    (else
+		     (%test-runner-run-list!
+		      r
+		      (if (eq? run-list #t) (list first) (cons first run-list)))
+		     (apply test-apply rest)
+		     (%test-runner-run-list! r run-list))))
+	    (let ((r (test-runner-create)))
+	      (test-with-runner r (apply test-apply first rest))
+	      ((test-runner-on-final r) r))))))
+
+;;; Predicates
+
+(define (%test-match-nth n count)
+  (let ((i 0))
+    (lambda (runner)
+      (set! i (+ i 1))
+      (and (>= i n) (< i (+ n count))))))
+
+(define-syntax test-match-nth
+  (syntax-rules ()
+    ((test-match-nth n)
+     (test-match-nth n 1))
+    ((test-match-nth n count)
+     (%test-match-nth n count))))
+
+(define (%test-match-all . pred-list)
+  (lambda (runner)
+    (let ((result #t))
+      (let loop ((l pred-list))
+	(if (null? l)
+	    result
+	    (begin
+	      (if (not ((car l) runner))
+		  (set! result #f))
+	      (loop (cdr l))))))))
+
+(define-syntax test-match-all
+  (syntax-rules ()
+    ((test-match-all pred ...)
+     (%test-match-all (%test-as-specifier pred) ...))))
+
+(define (%test-match-any . pred-list)
+  (lambda (runner)
+    (let ((result #f))
+      (let loop ((l pred-list))
+	(if (null? l)
+	    result
+	    (begin
+	      (if ((car l) runner)
+		  (set! result #t))
+	      (loop (cdr l))))))))
+
+(define-syntax test-match-any
+  (syntax-rules ()
+    ((test-match-any pred ...)
+     (%test-match-any (%test-as-specifier pred) ...))))
+
+;; Coerce to a predicate function:
+(define (%test-as-specifier specifier)
+  (cond ((procedure? specifier) specifier)
+	((integer? specifier) (test-match-nth 1 specifier))
+	((string? specifier) (test-match-name specifier))
+	(else
+	 (error "not a valid test specifier"))))
+
+(define-syntax test-skip
+  (syntax-rules ()
+    ((test-skip pred ...)
+     (let ((runner (test-runner-get)))
+       (%test-runner-skip-list! runner
+				  (cons (test-match-all (%test-as-specifier pred)  ...)
+					(%test-runner-skip-list runner)))))))
+
+(define-syntax test-expect-fail
+  (syntax-rules ()
+    ((test-expect-fail pred ...)
+     (let ((runner (test-runner-get)))
+       (%test-runner-fail-list! runner
+				  (cons (test-match-all (%test-as-specifier pred)  ...)
+					(%test-runner-fail-list runner)))))))
+
+(define (test-match-name name)
+  (lambda (runner)
+    (equal? name (test-runner-test-name runner))))
+
+(define (test-read-eval-string string)
+  (let* ((port (open-input-string string))
+	 (form (read port)))
+    (if (eof-object? (read-char port))
+	 (eval form)
+	(cond-expand
+	 (srfi-23 (error "(not at eof)"))
+	 (else "error")))))
+
diff --git a/lib/srfi/64.sld b/lib/srfi/64.sld
new file mode 100644
index 00000000..7fafa12a
--- /dev/null
+++ b/lib/srfi/64.sld
@@ -0,0 +1,38 @@
+(define-library (srfi 64)
+  (import (scheme base)
+          (scheme small))
+  (export test-begin
+          test-end test-assert test-eqv test-eq test-equal test-approximate
+          test-assert test-error test-apply test-with-runner test-match-nth
+          test-match-all test-match-any test-match-name test-skip
+          test-expect-fail test-read-eval-string test-runner-group-path
+          test-group test-group-with-cleanup test-result-ref test-result-set!
+          test-result-clear test-result-remove test-result-kind test-passed?
+          test-log-to-file
+          ; Misc test-runner functions
+          test-runner? test-runner-reset test-runner-null test-runner-simple
+          test-runner-current test-runner-factory test-runner-get
+          test-runner-create test-runner-test-name
+          ;; test-runner field setter and getter functions - see %test-record-define:
+          test-runner-pass-count test-runner-pass-count!
+          test-runner-fail-count test-runner-fail-count!
+          test-runner-xpass-count test-runner-xpass-count!
+          test-runner-xfail-count test-runner-xfail-count!
+          test-runner-skip-count test-runner-skip-count!
+          test-runner-group-stack test-runner-group-stack!
+          test-runner-on-test-begin test-runner-on-test-begin!
+          test-runner-on-test-end test-runner-on-test-end!
+          test-runner-on-group-begin test-runner-on-group-begin!
+          test-runner-on-group-end test-runner-on-group-end!
+          test-runner-on-final test-runner-on-final!
+          test-runner-on-bad-count test-runner-on-bad-count!
+          test-runner-on-bad-end-name test-runner-on-bad-end-name!
+          test-result-alist test-result-alist!
+          test-runner-aux-value test-runner-aux-value!
+          ;; default/simple call-back functions, used in default test-runner,
+          ;; but can be called to construct more complex ones.
+          test-on-group-begin-simple test-on-group-end-simple
+          test-on-bad-count-simple test-on-bad-end-name-simple
+          test-on-final-simple test-on-test-end-simple
+          test-on-final-simple)
+  (include "64.scm"))