--- /dev/null
+;;;; exceptions.test --- tests for Guile's exception handling -*- scheme -*-
+;;;; Copyright (C) 2001, 2003, 2004, 2006 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 2.1 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
+
+
+(use-modules (test-suite lib))
+
+(define-macro (throw-test title result . exprs)
+ `(pass-if ,title
+ (equal? ,result
+ (letrec ((stack '())
+ (push (lambda (val)
+ (set! stack (cons val stack)))))
+ (begin ,@exprs)
+ ;;(display ,title)
+ ;;(display ": ")
+ ;;(write (reverse stack))
+ ;;(newline)
+ (reverse stack)))))
+
+(with-test-prefix "throw/catch"
+
+ (with-test-prefix "wrong type argument"
+
+ (pass-if-exception "(throw 1)"
+ exception:wrong-type-arg
+ (throw 1)))
+
+ (with-test-prefix "wrong number of arguments"
+
+ (pass-if-exception "(throw)"
+ exception:wrong-num-args
+ (throw))
+
+ (pass-if-exception "throw 1 / catch 0"
+ exception:wrong-num-args
+ (catch 'a
+ (lambda () (throw 'a))
+ (lambda () #f)))
+
+ (pass-if-exception "throw 2 / catch 1"
+ exception:wrong-num-args
+ (catch 'a
+ (lambda () (throw 'a 2))
+ (lambda (x) #f)))
+
+ (pass-if-exception "throw 1 / catch 2"
+ exception:wrong-num-args
+ (catch 'a
+ (lambda () (throw 'a))
+ (lambda (x y) #f)))
+
+ (pass-if-exception "throw 3 / catch 2"
+ exception:wrong-num-args
+ (catch 'a
+ (lambda () (throw 'a 2 3))
+ (lambda (y x) #f)))
+
+ (pass-if-exception "throw 1 / catch 2+"
+ exception:wrong-num-args
+ (catch 'a
+ (lambda () (throw 'a))
+ (lambda (x y . rest) #f))))
+
+ (with-test-prefix "with lazy handler"
+
+ (pass-if "lazy fluid state"
+ (equal? '(inner outer arg)
+ (let ((fluid-parm (make-fluid))
+ (inner-val #f))
+ (fluid-set! fluid-parm 'outer)
+ (catch 'misc-exc
+ (lambda ()
+ (with-fluids ((fluid-parm 'inner))
+ (throw 'misc-exc 'arg)))
+ (lambda (key . args)
+ (list inner-val
+ (fluid-ref fluid-parm)
+ (car args)))
+ (lambda (key . args)
+ (set! inner-val (fluid-ref fluid-parm))))))))
+
+ (throw-test "normal catch"
+ '(1 2)
+ (catch 'a
+ (lambda ()
+ (push 1)
+ (throw 'a))
+ (lambda (key . args)
+ (push 2))))
+
+ (throw-test "catch and lazy catch"
+ '(1 2 3 4)
+ (catch 'a
+ (lambda ()
+ (push 1)
+ (lazy-catch 'a
+ (lambda ()
+ (push 2)
+ (throw 'a))
+ (lambda (key . args)
+ (push 3))))
+ (lambda (key . args)
+ (push 4))))
+
+ (throw-test "catch with rethrowing lazy catch handler"
+ '(1 2 3 4)
+ (catch 'a
+ (lambda ()
+ (push 1)
+ (lazy-catch 'a
+ (lambda ()
+ (push 2)
+ (throw 'a))
+ (lambda (key . args)
+ (push 3)
+ (apply throw key args))))
+ (lambda (key . args)
+ (push 4))))
+
+ (throw-test "catch with pre-unwind handler"
+ '(1 3 2)
+ (catch 'a
+ (lambda ()
+ (push 1)
+ (throw 'a))
+ (lambda (key . args)
+ (push 2))
+ (lambda (key . args)
+ (push 3))))
+
+ (throw-test "catch with rethrowing pre-unwind handler"
+ '(1 3 2)
+ (catch 'a
+ (lambda ()
+ (push 1)
+ (throw 'a))
+ (lambda (key . args)
+ (push 2))
+ (lambda (key . args)
+ (push 3)
+ (apply throw key args))))
+
+ (throw-test "catch with throw handler"
+ '(1 2 3 4)
+ (catch 'a
+ (lambda ()
+ (push 1)
+ (with-throw-handler 'a
+ (lambda ()
+ (push 2)
+ (throw 'a))
+ (lambda (key . args)
+ (push 3))))
+ (lambda (key . args)
+ (push 4))))
+
+ (throw-test "catch with rethrowing throw handler"
+ '(1 2 3 4)
+ (catch 'a
+ (lambda ()
+ (push 1)
+ (with-throw-handler 'a
+ (lambda ()
+ (push 2)
+ (throw 'a))
+ (lambda (key . args)
+ (push 3)
+ (apply throw key args))))
+ (lambda (key . args)
+ (push 4))))
+
+ (throw-test "effect of lazy-catch unwinding on throw to another key"
+ '(1 2 3 5 7)
+ (catch 'a
+ (lambda ()
+ (push 1)
+ (lazy-catch 'b
+ (lambda ()
+ (push 2)
+ (catch 'a
+ (lambda ()
+ (push 3)
+ (throw 'b))
+ (lambda (key . args)
+ (push 4))))
+ (lambda (key . args)
+ (push 5)
+ (throw 'a)))
+ (push 6))
+ (lambda (key . args)
+ (push 7))))
+
+ (throw-test "effect of with-throw-handler not-unwinding on throw to another key"
+ '(1 2 3 5 4 6)
+ (catch 'a
+ (lambda ()
+ (push 1)
+ (with-throw-handler 'b
+ (lambda ()
+ (push 2)
+ (catch 'a
+ (lambda ()
+ (push 3)
+ (throw 'b))
+ (lambda (key . args)
+ (push 4))))
+ (lambda (key . args)
+ (push 5)
+ (throw 'a)))
+ (push 6))
+ (lambda (key . args)
+ (push 7))))
+
+ (throw-test "lazy-catch chaining"
+ '(1 2 3 4 6 8)
+ (catch 'a
+ (lambda ()
+ (push 1)
+ (lazy-catch 'a
+ (lambda ()
+ (push 2)
+ (lazy-catch 'a
+ (lambda ()
+ (push 3)
+ (throw 'a))
+ (lambda (key . args)
+ (push 4)))
+ (push 5))
+ (lambda (key . args)
+ (push 6)))
+ (push 7))
+ (lambda (key . args)
+ (push 8))))
+
+ (throw-test "with-throw-handler chaining"
+ '(1 2 3 4 6 8)
+ (catch 'a
+ (lambda ()
+ (push 1)
+ (with-throw-handler 'a
+ (lambda ()
+ (push 2)
+ (with-throw-handler 'a
+ (lambda ()
+ (push 3)
+ (throw 'a))
+ (lambda (key . args)
+ (push 4)))
+ (push 5))
+ (lambda (key . args)
+ (push 6)))
+ (push 7))
+ (lambda (key . args)
+ (push 8))))
+
+ (throw-test "with-throw-handler inside lazy-catch"
+ '(1 2 3 4 6 8)
+ (catch 'a
+ (lambda ()
+ (push 1)
+ (lazy-catch 'a
+ (lambda ()
+ (push 2)
+ (with-throw-handler 'a
+ (lambda ()
+ (push 3)
+ (throw 'a))
+ (lambda (key . args)
+ (push 4)))
+ (push 5))
+ (lambda (key . args)
+ (push 6)))
+ (push 7))
+ (lambda (key . args)
+ (push 8))))
+
+ (throw-test "lazy-catch inside with-throw-handler"
+ '(1 2 3 4 6 8)
+ (catch 'a
+ (lambda ()
+ (push 1)
+ (with-throw-handler 'a
+ (lambda ()
+ (push 2)
+ (lazy-catch 'a
+ (lambda ()
+ (push 3)
+ (throw 'a))
+ (lambda (key . args)
+ (push 4)))
+ (push 5))
+ (lambda (key . args)
+ (push 6)))
+ (push 7))
+ (lambda (key . args)
+ (push 8))))
+
+ (throw-test "throw handlers throwing to each other recursively"
+ '(1 2 3 4 8 6 10 12)
+ (catch #t
+ (lambda ()
+ (push 1)
+ (with-throw-handler 'a
+ (lambda ()
+ (push 2)
+ (with-throw-handler 'b
+ (lambda ()
+ (push 3)
+ (with-throw-handler 'c
+ (lambda ()
+ (push 4)
+ (throw 'b)
+ (push 5))
+ (lambda (key . args)
+ (push 6)
+ (throw 'a)))
+ (push 7))
+ (lambda (key . args)
+ (push 8)
+ (throw 'c)))
+ (push 9))
+ (lambda (key . args)
+ (push 10)
+ (throw 'b)))
+ (push 11))
+ (lambda (key . args)
+ (push 12))))
+
+ (throw-test "repeat of previous test but with lazy-catch"
+ '(1 2 3 4 8 12)
+ (catch #t
+ (lambda ()
+ (push 1)
+ (lazy-catch 'a
+ (lambda ()
+ (push 2)
+ (lazy-catch 'b
+ (lambda ()
+ (push 3)
+ (lazy-catch 'c
+ (lambda ()
+ (push 4)
+ (throw 'b)
+ (push 5))
+ (lambda (key . args)
+ (push 6)
+ (throw 'a)))
+ (push 7))
+ (lambda (key . args)
+ (push 8)
+ (throw 'c)))
+ (push 9))
+ (lambda (key . args)
+ (push 10)
+ (throw 'b)))
+ (push 11))
+ (lambda (key . args)
+ (push 12))))
+
+ (throw-test "throw handler throwing to lexically inside catch"
+ '(1 2 7 5 4 6 9)
+ (with-throw-handler 'a
+ (lambda ()
+ (push 1)
+ (catch 'b
+ (lambda ()
+ (push 2)
+ (throw 'a)
+ (push 3))
+ (lambda (key . args)
+ (push 4))
+ (lambda (key . args)
+ (push 5)))
+ (push 6))
+ (lambda (key . args)
+ (push 7)
+ (throw 'b)
+ (push 8)))
+ (push 9))
+
+ (throw-test "reuse of same throw handler after lexically inside catch"
+ '(0 1 2 7 5 4 6 7 10)
+ (catch 'b
+ (lambda ()
+ (push 0)
+ (with-throw-handler 'a
+ (lambda ()
+ (push 1)
+ (catch 'b
+ (lambda ()
+ (push 2)
+ (throw 'a)
+ (push 3))
+ (lambda (key . args)
+ (push 4))
+ (lambda (key . args)
+ (push 5)))
+ (push 6)
+ (throw 'a))
+ (lambda (key . args)
+ (push 7)
+ (throw 'b)
+ (push 8)))
+ (push 9))
+ (lambda (key . args)
+ (push 10))))
+
+ (throw-test "again but with two chained throw handlers"
+ '(0 1 11 2 13 7 5 4 12 13 7 10)
+ (catch 'b
+ (lambda ()
+ (push 0)
+ (with-throw-handler 'a
+ (lambda ()
+ (push 1)
+ (with-throw-handler 'a
+ (lambda ()
+ (push 11)
+ (catch 'b
+ (lambda ()
+ (push 2)
+ (throw 'a)
+ (push 3))
+ (lambda (key . args)
+ (push 4))
+ (lambda (key . args)
+ (push 5)))
+ (push 12)
+ (throw 'a))
+ (lambda (key . args)
+ (push 13)))
+ (push 6))
+ (lambda (key . args)
+ (push 7)
+ (throw 'b)))
+ (push 9))
+ (lambda (key . args)
+ (push 10))))
+
+ )
+
+(with-test-prefix "false-if-exception"
+
+ (pass-if (false-if-exception #t))
+ (pass-if (not (false-if-exception #f)))
+ (pass-if (not (false-if-exception (error "xxx"))))
+
+ ;; Not yet working.
+ ;;
+ ;; (with-test-prefix "in empty environment"
+ ;; ;; an environment with no bindings at all
+ ;; (define empty-environment
+ ;; (make-module 1))
+ ;;
+ ;; (pass-if "#t"
+ ;; (eval `(,false-if-exception #t)
+ ;; empty-environment))
+ ;; (pass-if "#f"
+ ;; (not (eval `(,false-if-exception #f)
+ ;; empty-environment)))
+ ;; (pass-if "exception"
+ ;; (not (eval `(,false-if-exception (,error "xxx"))
+ ;; empty-environment))))
+ )
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