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;;;; regexp.test --- test Guile's regular expression functions -*- scheme -*-
;;;; Jim Blandy <jimb@red-bean.com> --- September 1999
;;;;
;;;; Copyright (C) 1999, 2004, 2006, 2007, 2008 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-regexp)
#:use-module (test-suite lib)
#:use-module (ice-9 regex))
;;; Run a regexp-substitute or regexp-substitute/global test, once
;;; providing a real port and once providing #f, requesting direct
;;; string output.
(define (vary-port func expected . args)
(pass-if "port is string port"
(equal? expected
(call-with-output-string
(lambda (port)
(apply func port args)))))
(pass-if "port is #f"
(equal? expected
(apply func #f args))))
(define (object->string obj)
(call-with-output-string
(lambda (port)
(write obj port))))
;;;
;;; make-regexp
;;;
(with-test-prefix "make-regexp"
(pass-if-exception "no args" exception:wrong-num-args
(make-regexp))
(pass-if-exception "bad pat arg" exception:wrong-type-arg
(make-regexp 'blah))
;; in guile prior to 1.6.5 make-regex didn't validate its flags args
(pass-if-exception "bad arg 2" exception:wrong-type-arg
(make-regexp "xyz" 'abc))
(pass-if-exception "bad arg 3" exception:wrong-type-arg
(make-regexp "xyz" regexp/icase 'abc)))
;;;
;;; match:string
;;;
(with-test-prefix "match:string"
(pass-if "foo"
(string=? "foo" (match:string (string-match ".*" "foo"))))
(pass-if "foo offset 1"
(string=? "foo" (match:string (string-match ".*" "foo" 1)))))
;;;
;;; regexp-exec
;;;
(with-test-prefix "regexp-exec"
(pass-if-exception "non-integer offset" exception:wrong-type-arg
(let ((re (make-regexp "ab+")))
(regexp-exec re "aaaabbbb" 1.5 'bogus-flags-arg)))
(pass-if-exception "non-string input" exception:wrong-type-arg
(let ((re (make-regexp "ab+")))
(regexp-exec re 'not-a-string)))
(pass-if-exception "non-string input, with offset" exception:wrong-type-arg
(let ((re (make-regexp "ab+")))
(regexp-exec re 'not-a-string 5)))
;; in guile 1.8.1 and earlier, a #\nul character in the input string was
;; only detected in a critical section, and the resulting error throw
;; abort()ed the program
(pass-if-exception "nul in input" exception:string-contains-nul
(let ((re (make-regexp "ab+")))
(regexp-exec re (string #\a #\b (integer->char 0)))))
;; in guile 1.8.1 and earlier, a bogus flags argument was only detected
;; inside a critical section, and the resulting error throw abort()ed the
;; program
(pass-if-exception "non-integer flags" exception:wrong-type-arg
(let ((re (make-regexp "ab+")))
(regexp-exec re "aaaabbbb" 0 'bogus-flags-arg))))
;;;
;;; fold-matches
;;;
(with-test-prefix "fold-matches"
(pass-if "without flags"
(equal? '("hello")
(fold-matches "^[a-z]+$" "hello" '()
(lambda (match result)
(cons (match:substring match)
result)))))
(pass-if "with flags"
;; Prior to 1.8.6, passing an additional flag would not work.
(null?
(fold-matches "^[a-z]+$" "hello" '()
(lambda (match result)
(cons (match:substring match)
result))
(logior regexp/notbol regexp/noteol)))))
;;;
;;; regexp-quote
;;;
(with-test-prefix "regexp-quote"
(pass-if-exception "no args" exception:wrong-num-args
(regexp-quote))
(pass-if-exception "bad string arg" exception:wrong-type-arg
(regexp-quote 'blah))
(let ((lst `((regexp/basic ,regexp/basic)
(regexp/extended ,regexp/extended)))
;; string of all characters, except #\nul which doesn't work because
;; it's the usual end-of-string for the underlying C regexec()
(allchars (list->string (map integer->char
(cdr (iota char-code-limit))))))
(for-each
(lambda (elem)
(let ((name (car elem))
(flag (cadr elem)))
(with-test-prefix name
;; try on each individual character, except #\nul
(do ((i 1 (1+ i)))
((>= i char-code-limit))
(let* ((c (integer->char i))
(s (string c))
(q (regexp-quote s)))
(pass-if (list "char" i c s q)
(let ((m (regexp-exec (make-regexp q flag) s)))
(and (= 0 (match:start m))
(= 1 (match:end m)))))))
;; try on pattern "aX" where X is each character, except #\nul
;; this exposes things like "?" which are special only when they
;; follow a pattern to repeat or whatever ("a" in this case)
(do ((i 1 (1+ i)))
((>= i char-code-limit))
(let* ((c (integer->char i))
(s (string #\a c))
(q (regexp-quote s)))
(pass-if (list "string \"aX\"" i c s q)
(let ((m (regexp-exec (make-regexp q flag) s)))
(and (= 0 (match:start m))
(= 2 (match:end m)))))))
(pass-if "string of all chars"
(let ((m (regexp-exec (make-regexp (regexp-quote allchars)
flag) allchars)))
(and (= 0 (match:start m))
(= (string-length allchars) (match:end m))))))))
lst)))
;;;
;;; regexp-substitute
;;;
(with-test-prefix "regexp-substitute"
(let ((match
(string-match "patleft(sub1)patmid(sub2)patright"
"contleftpatleftsub1patmidsub2patrightcontright")))
(define (try expected . args)
(with-test-prefix (object->string args)
(apply vary-port regexp-substitute expected match args)))
(try "")
(try "string1" "string1")
(try "string1string2" "string1" "string2")
(try "patleftsub1patmidsub2patright" 0)
(try "hi-patleftsub1patmidsub2patright-bye" "hi-" 0 "-bye")
(try "sub1" 1)
(try "hi-sub1-bye" "hi-" 1 "-bye")
(try "hi-sub2-bye" "hi-" 2 "-bye")
(try "contleft" 'pre)
(try "contright" 'post)
(try "contrightcontleft" 'post 'pre)
(try "contrightcontleftcontrightcontleft" 'post 'pre 'post 'pre)
(try "contrightsub2sub1contleft" 'post 2 1 'pre)
(try "foosub1sub1sub1sub1bar" "foo" 1 1 1 1 "bar")))
(with-test-prefix "regexp-substitute/global"
(define (try expected . args)
(with-test-prefix (object->string args)
(apply vary-port regexp-substitute/global expected args)))
(try "hi" "a(x*)b" "ab" "hi")
(try "" "a(x*)b" "ab" 1)
(try "xx" "a(x*)b" "axxb" 1)
(try "xx" "a(x*)b" "_axxb_" 1)
(try "pre" "a(x*)b" "preaxxbpost" 'pre)
(try "post" "a(x*)b" "preaxxbpost" 'post)
(try "string" "x" "string" 'pre "y" 'post)
(try "4" "a(x*)b" "_axxb_" (lambda (m)
(number->string (match:end m 1))))
(try "_aybycyd_" "x+" "_axbxxcxxxd_" 'pre "y" 'post)
;; This should not go into an infinite loop, just because the regexp
;; can match the empty string. This test also kind of beats on our
;; definition of where a null string can match.
(try "y_yaybycydy_y" "x*" "_axbxxcxxxd_" 'pre "y" 'post)
;; These kind of bother me. The extension from regexp-substitute to
;; regexp-substitute/global is only natural if your item list
;; includes both pre and post. If those are required, why bother
;; to include them at all?
(try "4:7:12:_" "a(x*)b" "_axxbaxbaxxxb_"
(lambda (m) (number->string (match:end m 1))) ":"
'post)
(try "4:10:19:_:19:10:4" "a(x*)b" "_axxbaxxxxbaxxxxxxxb_"
(lambda (m) (number->string (match:end m 1))) ":"
'post
":" (lambda (m) (number->string (match:end m 1))))
;; Jan Nieuwenhuizen's bug, 2 Sep 1999
(try "" "_" (make-string 500 #\_)
'post))
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