--- /dev/null
+;;;; srfi-34.test --- test suite for SRFI-34 -*- scheme -*-
+;;;;
+;;;; Copyright (C) 2003, 2004, 2006, 2008 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.
+;;;;
+;;;; You should have received a copy of the GNU General Public License
+;;;; along with this software; see the file COPYING. If not, write to
+;;;; the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+;;;; Boston, MA 02110-1301 USA
+
+(define-module (test-suite test-srfi-34)
+ :duplicates (last) ;; avoid warning about srfi-34 replacing `raise'
+ :use-module (test-suite lib)
+ :use-module (srfi srfi-13)
+ :use-module (srfi srfi-34))
+
+(define (expr-prints-and-evals-to? expr printout result)
+ (let ((actual-result *unspecified*))
+ (let ((actual-printout
+ (string-trim-both
+ (with-output-to-string
+ (lambda ()
+ (set! actual-result
+ (eval expr (current-module))))))))
+ ;;(write (list actual-printout printout actual-result result))
+ ;;(newline)
+ (and (equal? actual-printout printout)
+ (equal? actual-result result)))))
+
+(with-test-prefix "SRFI 34"
+
+ (pass-if "cond-expand"
+ (cond-expand (srfi-34 #t)
+ (else #f)))
+
+ (pass-if "example 1"
+ (expr-prints-and-evals-to?
+ '(call-with-current-continuation
+ (lambda (k)
+ (with-exception-handler (lambda (x)
+ (display "condition: ")
+ (write x)
+ (newline)
+ (k 'exception))
+ (lambda ()
+ (+ 1 (raise 'an-error))))))
+ "condition: an-error"
+ 'exception))
+
+ ;; SRFI 34 specifies that the behaviour of the call/cc expression
+ ;; after printing "something went wrong" is unspecified, which is
+ ;; tricky to test for in a positive way ... Guile behaviour at time
+ ;; of writing is to signal a "lazy-catch handler did return" error,
+ ;; which feels about right to me.
+ (pass-if "example 2"
+ (expr-prints-and-evals-to?
+ '(false-if-exception
+ (call-with-current-continuation
+ (lambda (k)
+ (with-exception-handler (lambda (x)
+ (display "something went wrong")
+ (newline)
+ 'dont-care)
+ (lambda ()
+ (+ 1 (raise 'an-error)))))))
+ "something went wrong"
+ #f))
+
+ (pass-if "example 3"
+ (expr-prints-and-evals-to?
+ '(guard (condition
+ (else
+ (display "condition: ")
+ (write condition)
+ (newline)
+ 'exception))
+ (+ 1 (raise 'an-error)))
+ "condition: an-error"
+ 'exception))
+
+ (pass-if "example 4"
+ (expr-prints-and-evals-to?
+ '(guard (condition
+ (else
+ (display "something went wrong")
+ (newline)
+ 'dont-care))
+ (+ 1 (raise 'an-error)))
+ "something went wrong"
+ 'dont-care))
+
+ (pass-if "example 5"
+ (expr-prints-and-evals-to?
+ '(call-with-current-continuation
+ (lambda (k)
+ (with-exception-handler (lambda (x)
+ (display "reraised ") (write x) (newline)
+ (k 'zero))
+ (lambda ()
+ (guard (condition
+ ((positive? condition) 'positive)
+ ((negative? condition) 'negative))
+ (raise 1))))))
+ ""
+ 'positive))
+
+ (pass-if "example 6"
+ (expr-prints-and-evals-to?
+ '(call-with-current-continuation
+ (lambda (k)
+ (with-exception-handler (lambda (x)
+ (display "reraised ") (write x) (newline)
+ (k 'zero))
+ (lambda ()
+ (guard (condition
+ ((positive? condition) 'positive)
+ ((negative? condition) 'negative))
+ (raise -1))))))
+ ""
+ 'negative))
+
+ (pass-if "example 7"
+ (expr-prints-and-evals-to?
+ '(call-with-current-continuation
+ (lambda (k)
+ (with-exception-handler (lambda (x)
+ (display "reraised ") (write x) (newline)
+ (k 'zero))
+ (lambda ()
+ (guard (condition
+ ((positive? condition) 'positive)
+ ((negative? condition) 'negative))
+ (raise 0))))))
+ "reraised 0"
+ 'zero))
+
+ (pass-if "example 8"
+ (expr-prints-and-evals-to?
+ '(guard (condition
+ ((assq 'a condition) => cdr)
+ ((assq 'b condition)))
+ (raise (list (cons 'a 42))))
+ ""
+ 42))
+
+ (pass-if "example 9"
+ (expr-prints-and-evals-to?
+ '(guard (condition
+ ((assq 'a condition) => cdr)
+ ((assq 'b condition)))
+ (raise (list (cons 'b 23))))
+ ""
+ '(b . 23)))
+
+ (pass-if "`with-exception-handler' invokes HANDLER in THUNK's dynamic env."
+ ;; In Guile 1.8.5 and earlier, unwinders would be called before
+ ;; the exception handler, which reads "The handler is called in
+ ;; the dynamic environment of the call to `raise'".
+ (call/cc
+ (lambda (return)
+ (let ((inside? #f))
+ (with-exception-handler
+ (lambda (c)
+ ;; This handler must be called before the unwinder below.
+ (return inside?))
+ (lambda ()
+ (dynamic-wind
+ (lambda ()
+ (set! inside? #t))
+ (lambda ()
+ (raise 'some-exception))
+ (lambda ()
+ ;; This unwinder should not be executed before the
+ ;; handler is called.
+ (set! inside? #f))))))))))
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