4 # Tests derived from Japhs.
6 # These test use obscure features of Perl, or surprising combinations
7 # of features. The tests were added because in the past, they have
8 # exposed several bugs in Perl.
10 # Some of these tests may actually (mis)use bugs or use undefined behaviour.
11 # These tests are still useful - behavioural changes or bugfixes will be
12 # noted, and a remark can be put in the documentation. (Don't forget to
15 # Getting everything to run well on the myriad of platforms Perl runs on
16 # is unfortunately not a trivial task.
18 # WARNING: these tests are obfuscated. Do not get frustrated.
19 # Ask Abigail <abigail@abigail.be>, or use the Deparse or Concise
20 # modules (the former parses Perl to Perl, the latter shows the
21 # op syntax tree) like this:
22 # ./perl -Ilib -MO=Deparse foo.pl
23 # ./perl -Ilib -MO=Concise foo.pl
27 if (ord("A") == 193) {
28 print "1..0 # Skip: EBCDIC\n"; # For now, until someone has time.
38 # ./test.pl does real evilness by jumping to a label.
39 # This function copies the skip from ./test, omitting the goto.
43 my $n = @_ ? shift : 1;
46 print STDOUT "ok $test # skip: $why\n";
53 # ./test.pl doesn't give use 'notok', so we make it here.
56 my ($pass, $name, @mess) = @_;
57 _ok(!$pass, _where(), $name, @mess);
60 my $JaPH = "Just another Perl Hacker";
61 my $JaPh = "Just another Perl hacker";
62 my $JaPH_n = "Just another Perl Hacker\n";
63 my $JaPh_n = "Just another Perl hacker\n";
64 my $JaPH_s = "Just another Perl Hacker ";
65 my $JaPh_s = "Just another Perl hacker ";
66 my $JaPH_c = "Just another Perl Hacker,";
67 my $JaPh_c = "Just another Perl hacker,";
72 my $out = sprintf "Just another Perl Hacker";
78 my @primes = (2, 3, 7, 13, 53, 101, 557, 1429);
79 my @composites = (4, 10, 25, 32, 75, 143, 1333, 1728);
81 my %primeness = ((map {$_ => 1} @primes),
82 (map {$_ => 0} @composites));
84 while (my ($num, $is_prime) = each %primeness) {
85 my $comment = "$num is " . ($is_prime ? "prime." : "composite.");
87 my $sub = $is_prime ? "ok" : "notok";
89 &$sub (( 1 x $num) !~ /^1?$|^(11+?)\1+$/, $comment);
90 &$sub (( 0 x $num) !~ m 0^\0?$|^(\0\0+?)\1+$0, $comment);
91 &$sub (("m" x $num) !~ m m^\m?$|^(\m\m+?)\1+$mm, $comment);
96 { # Some platforms use different quoting techniques.
97 # I do not have access to those platforms to test
98 # things out. So, we'll skip things....
99 if ($^O eq 'MSWin32' ||
102 skip "Your platform quotes differently.", 3;
106 my $expected = $JaPH;
107 $expected =~ s/ /\n/g;
109 is (runperl (switches => [qw /'-weprint<<EOT;' -eJust -eanother
110 -ePerl -eHacker -eEOT/],
112 $expected, "Multiple -e switches");
114 is (runperl (switches => [q !'-wle$_=<<EOT;y/\n/ /;print;'!,
115 qw ! -eJust -eanother -ePerl -eHacker -eEOT!],
117 $JaPH . " \n", "Multiple -e switches");
119 is (runperl (switches => [qw !-wl!],
120 progs => [qw !print qq-@{[ qw+ Just
121 another Perl Hacker +]}-!],
123 $JaPH_n, "Multiple -e switches");
127 if ($^O eq 'MSWin32' ||
130 skip "Your platform quotes differently.", 1;
133 is (runperl (switches => [qw /-sweprint --/,
134 "-_='Just another Perl Hacker'"],
137 $JaPH, 'setting $_ via -s');
141 my $datafile = "datatmp000";
142 1 while -f ++ $datafile;
143 END {unlink_all $datafile if $datafile}
145 open MY_DATA, "> $datafile" or die "Failed to open $datafile: $!";
146 print MY_DATA << " --";
154 close MY_DATA or die "Failed to close $datafile: $!\n";
161 if (/^#{7}(?:\s+(.*))?/) {
162 push @progs => {COMMENT => $1 || '',
170 elsif (/^(COMMENT|CODE|ARGS|SWITCHES|EXPECT|SKIP|SKIP_OS)
173 $progs [-1] {$key} = '' unless exists $progs [-1] {$key};
174 next unless defined $2;
181 if (ref ($progs [-1] {$key})) {
182 push @{$progs [-1] {$key}} => $_;
185 $progs [-1] {$key} .= $_;
189 foreach my $program (@progs) {
190 if (exists $program -> {SKIP}) {
191 chomp $program -> {SKIP};
192 skip $program -> {SKIP}, 1;
196 chomp @{$program -> {SKIP_OS}};
197 if (@{$program -> {SKIP_OS}}) {
198 if (grep {$^O eq $_} @{$program -> {SKIP_OS}}) {
199 skip "Your OS uses different quoting.", 1;
204 map {s/\$datafile/$datafile/} @{$program -> {ARGS}};
205 $program -> {EXPECT} = $JaPH unless exists $program -> {EXPECT};
206 $program -> {EXPECT} =~ s/\$JaPH_s\b/$JaPH_s/g;
207 $program -> {EXPECT} =~ s/\$JaPh_c\b/$JaPh_c/g;
208 $program -> {EXPECT} =~ s/\$JaPh\b/$JaPh/g;
209 chomp ($program -> {EXPECT}, @{$program -> {SWITCHES}},
210 @{$program -> {ARGS}});
211 fresh_perl_is ($program -> {CODE},
212 $program -> {EXPECT},
213 {switches => $program -> {SWITCHES},
214 args => $program -> {ARGS},
216 $program -> {COMMENT});
221 my $progfile = "progtmp000";
222 1 while -f ++ $progfile;
223 END {unlink_all $progfile if $progfile}
225 my @programs = (<< ' --', << ' --');
227 BEGIN{$|=$SIG{__WARN__}=sub{$_=$_[0];y-_- -;print/(.)"$/;seek _,-open(_
228 ,"+<$0"),2;truncate _,tell _;close _;exec$0}}//rekcaH_lreP_rehtona_tsuJ
231 BEGIN{$SIG{__WARN__}=sub{$_=pop;y-_- -;print/".*(.)"/;
232 truncate$0,-1+-s$0;exec$0;}}//rekcaH_lreP_rehtona_tsuJ
236 if ($^O eq 'VMS' or $^O eq 'MSWin32') {
237 # VMS needs extensions for files to be executable,
238 # but the Japhs above rely on $0 being exactly the
239 # filename of the program.
240 skip $^O, 2 * @programs;
245 unless (defined $Config {useperlio}) {
246 skip "Uuseperlio", 2 * @programs;
251 foreach my $program (@programs) {
252 open my $fh => "> $progfile" or die "Failed to open $progfile: $!\n";
254 close $fh or die "Failed to close $progfile: $!\n";
256 chmod 0755 => $progfile or die "Failed to chmod $progfile: $!\n";
257 my $command = "./$progfile 2>&1";
258 if ( $^O eq 'qnx' ) {
259 skip "#!./perl not supported in QNX4";
260 skip "#!./perl not supported in QNX4";
262 my $output = `$command`;
264 is ($output, $JaPH, "Self correcting code $i");
266 $output = `$command`;
267 is ($output, "", "Self corrected code $i");
274 ####### Funky loop 1.
275 $_ = q ;4a75737420616e6f74686572205065726c204861636b65720as;;
276 for (s;s;s;s;s;s;s;s;s;s;s;s)
277 {s;(..)s?;qq qprint chr 0x$1 and \161 ssq;excess;}
279 ####### Funky loop 2.
280 $_ = q *4a75737420616e6f74686572205065726c204861636b65720a*;
281 for ($*=******;$**=******;$**=******) {$**=*******s*..*qq}
284 SKIP: $* was removed.
286 ####### Funky loop 3.
287 $_ = q *4a75737420616e6f74686572205065726c204861636b65720a*;
288 for ($*=******;$**=******;$**=******) {$**=*******s*..*qq}
291 SKIP: $* was removed.
293 ####### Funky loop 4.
294 $_ = q ?4a75737420616e6f74686572205065726c204861636b65720as?;??;
296 {??;s;(..)s?;qq ?print chr 0x$1 and \161 ss?;excess;??}
297 SKIP: Abuses a fixed bug.
299 ####### Funky loop 5.
300 for (s??4a75737420616e6f74686572205065726c204861636b65720as?;??;??)
301 {s?(..)s\??qq \?print chr 0x$1 and q ss\??excess}
302 SKIP: Abuses a fixed bug.
304 ####### Funky loop 6.
305 $a = q 94a75737420616e6f74686572205065726c204861636b65720a9 and
306 ${qq$\x5F$} = q 97265646f9 and s g..g;
307 qq e\x63\x68\x72\x20\x30\x78$&eggee;
308 {eval if $a =~ s e..eqq qprint chr 0x$& and \x71\x20\x71\x71qeexcess}
311 @r=reverse(M=>(0)x99=>CM=>(0)x399=>D=>(0)x99=>CD=>(
312 0)x299=>C=>(0)x9=>XC=>(0)x39=>L=>(0)x9=>XL=>(0)x29=>X=>IX=>0=>0=>0=>V=>IV=>0=>0
313 =>I=>$==-2449231+gm_julian_day+time);do{until($=<$#r){$_.=$r[$#r];$=-=$#r}for(;
314 !$r[--$#r];){}}while$=;$,="\x20";print+$_=>September=>MCMXCIII=>=>=>=>=>=>=>=>
318 SKIP: Times::JulianDay not part of the main distribution.
321 sub _'_{$_'_=~s/$a/$_/}map{$$_=$Z++}Y,a..z,A..X;*{($_::_=sprintf+q=%X==>"$A$Y".
322 "$b$r$T$u")=~s~0~O~g;map+_::_,U=>T=>L=>$Z;$_::_}=*_;sub _{print+/.*::(.*)/s};;;
323 *{chr($b*$e)}=*_'_;*__=*{chr(1<<$e)}; # Perl 5.6.0 broke this...
324 _::_(r(e(k(c(a(H(__(l(r(e(P(__(r(e(h(t(o(n(a(__(t(us(J())))))))))))))))))))))))
325 EXPECT: Just__another__Perl__Hacker
328 $"=$,;*{;qq{@{[(A..Z)[qq[0020191411140003]=~m[..]g]]}}}=*_=sub{print/::(.*)/};
329 $\=$/;q<Just another Perl Hacker>->();
332 $"=$,;*{;qq{@{[(A..Z)[qq[0020191411140003]=~m[..]g]]}}}=*_;
333 sub _ {push @_ => /::(.*)/s and goto &{ shift}}
334 sub shift {print shift; @_ and goto &{+shift}}
335 Hack ("Just", "Perl ", " ano", "er\n", "ther "); # YYYYMMDD
338 $, = " "; sub AUTOLOAD {($AUTOLOAD =~ /::(.*)/) [0];}
339 print+Just (), another (), Perl (), Hacker ();
341 ####### Look ma! No letters!
342 $@="\145\143\150\157\040\042\112\165\163\164\040\141\156\157\164".
343 "\150\145\162\040\120\145\162\154\040\110\141\143\153\145\162".
344 "\042\040\076\040\057\144\145\166\057\164\164\171";`$@`
347 ####### sprintf fun 1.
348 sub f{sprintf$_[0],$_[1],$_[2]}print f('%c%s',74,f('%c%s',117,f('%c%s',115,f(
349 '%c%s',116,f('%c%s',32,f('%c%s',97,f('%c%s',0x6e,f('%c%s',111,f('%c%s',116,f(
350 '%c%s',104,f('%c%s',0x65,f('%c%s',114,f('%c%s',32,f('%c%s',80,f('%c%s',101,f(
351 '%c%s',114,f('%c%s',0x6c,f('%c%s',32,f('%c%s',0x48,f('%c%s',97,f('%c%s',99,f(
352 '%c%s',107,f('%c%s',101,f('%c%s',114,f('%c%s',10,)))))))))))))))))))))))))
354 ####### sprintf fun 2.
355 sub f{sprintf'%c%s',$_[0],$_[1]}print f(74,f(117,f(115,f(116,f(32,f(97,
356 f(110,f(111,f(116,f(104,f(0x65,f(114,f(32,f(80,f(101,f(114,f(0x6c,f(32,
357 f(0x48,f(97,f(99,f(107,f(101,f(114,f(10,q ff)))))))))))))))))))))))))
360 %0=map{local$_=$_;reverse+chop,$_}ABC,ACB,BAC,BCA,CAB,CBA;$_=3 .AC;1while+
361 s/(\d+)((.)(.))/($0=$1-1)?"$0$3$0{$2}1$2$0$0{$2}$4":"$3 => $4\n"/xeg;print
416 -Mstrict='}); print "Just another Perl Hacker"; ({'
418 SKIP: No longer works in 5.8.2 and beyond.
423 srand 123456;$-=rand$_--=>@[[$-,$_]=@[[$_,$-]for(reverse+1..(@[=split
424 //=>"IGrACVGQ\x02GJCWVhP\x02PL\x02jNMP"));print+(map{$_^q^"^}@[),"\n"
425 SKIP: Solaris specific.
427 ####### print and __PACKAGE__
428 package Just_another_Perl_Hacker; sub print {($_=$_[0])=~ s/_/ /g;
429 print } sub __PACKAGE__ { &
430 print ( __PACKAGE__)} &
435 * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
436 / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / /
437 % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % %;
438 BEGIN {% % = ($ _ = " " => print "Just another Perl Hacker\n")}
441 sub J::FETCH{Just }$_.='print+"@{[map';sub J::TIESCALAR{bless\my$J,J}
442 sub A::FETCH{another}$_.='{tie my($x),$';sub A::TIESCALAR{bless\my$A,A}
443 sub P::FETCH{Perl }$_.='_;$x}qw/J A P';sub P::TIESCALAR{bless\my$P,P}
444 sub H::FETCH{Hacker }$_.=' H/]}\n"';eval;sub H::TIESCALAR{bless\my$H,H}
447 package Z;use overload'""'=>sub{$b++?Hacker:another};
448 sub TIESCALAR{bless\my$y=>Z}sub FETCH{$a++?Perl:Just}
449 $,=$";my$x=tie+my$y=>Z;print$y,$x,$y,$x,"\n";#Abigail
453 sub A::TIESCALAR{bless\my$x=>A};package B;@q[0..3]=qw/Hacker Perl
454 another Just/;use overload'""'=>sub{pop @q};sub A::FETCH{bless\my
455 $y=>B}; tie my $shoe => qq 'A';print "$shoe $shoe $shoe $shoe\n";
458 sub A::TIESCALAR{bless\my$x=>'A'};package B;@q=qw/Hacker Perl
459 another Just/;use overload'""',sub{pop @q};sub A::FETCH{bless
460 \my $y=>B};tie my$shoe=>'A';print"$shoe $shoe $shoe $shoe\n";
463 tie $" => A; $, = " "; $\ = "\n"; @a = ("") x 2; print map {"@a"} 1 .. 4;
464 sub A::TIESCALAR {bless \my $A => A} # Yet Another silly JAPH by Abigail
465 sub A::FETCH {@q = qw /Just Another Perl Hacker/ unless @q; shift @q}
466 SKIP: Pending a bug fix.
468 ####### Prototype fun 1
469 sub camel (^#87=i@J&&&#]u'^^s]#'#={123{#}7890t[0.9]9@+*`"'***}A&&&}n2o}00}t324i;
470 h[{e **###{r{+P={**{e^^^#'#i@{r'^=^{l+{#}H***i[0.9]&@a5`"':&^;&^,*&^$43##@@####;
471 c}^^^&&&k}&&&}#=e*****[]}'r####'`=437*{#};::'1[0.9]2@43`"'*#==[[.{{],,,1278@#@);
472 print+((($llama=prototype'camel')=~y|+{#}$=^*&[0-9]i@:;`"',.| |d)&&$llama."\n");
473 SKIP: Abuses a fixed bug.
475 ####### Prototype fun 2
476 print prototype sub "Just another Perl Hacker" {};
477 SKIP: Abuses a fixed bug.
479 ####### Prototype fun 3
480 sub _ "Just another Perl Hacker"; print prototype \&_
481 SKIP: Abuses a fixed bug.
485 ${"@_"} = "/"; split // => eval join "+" => 1 .. 7;
486 *{"@_"} = sub {foreach (sort keys %_) {print "$_ $_{$_} "}};
487 %{"@_"} = %_ = (Just => another => Perl => Hacker); &{%{%_}};
488 SKIP: Hashes are now randomized.
492 $" = "/"; split // => eval join "+" => 1 .. 7;
493 *{"@_"} = sub {foreach (sort keys %_) {print "$_ $_{$_} "}};
494 %_ = (Just => another => Perl => Hacker); &{%_};
495 SKIP: Hashes are now randomized.
499 $" = "/"; split $, => eval join "+" => 1 .. 7;
500 *{"@_"} = sub {foreach (sort keys %_) {print "$_ $_{$_} "}};
501 %{"@_"} = %_ = (Just => another => Perl => Hacker); &{%{%_}};
502 SKIP: Hashes are now randomized.
505 ####### Here documents 1
506 $_ = "\x3C\x3C\x45\x4F\x54"; s/<<EOT/<<EOT/e; print;
507 Just another Perl Hacker
510 ####### Here documents 2
511 $_ = "\x3C\x3C\x45\x4F\x54";
512 print if s/<<EOT/<<EOT/e;
513 Just another Perl Hacker
516 ####### Here documents 3
517 $_ = "\x3C\x3C\x45\x4F\x54" and s/<<EOT/<<EOT/e and print;
518 Just another Perl Hacker
521 ####### Here documents 4
522 $_ = "\x3C\x3C\x45\x4F\x54\n" and s/<<EOT/<<EOT/ee and print;
523 "Just another Perl Hacker"
526 ####### Self modifying code 1
527 $_ = "goto F.print chop;\n=rekcaH lreP rehtona tsuJ";F1:eval
530 ####### Overloaded constants 1
531 BEGIN {$^H {q} = sub {pop and pop and print pop}; $^H = 2**4.2**12}
532 "Just "; "another "; "Perl "; "Hacker";
535 ####### Overloaded constants 2
536 BEGIN {$^H {q} = sub {$_ [1] =~ y/S-ZA-IK-O/q-tc-fe-m/d; $_ [1]}; $^H = 0x28100}
537 print "Just another PYTHON hacker\n";
540 ####### Overloaded constants 3
541 BEGIN {$^H {join "" => ("a" .. "z") [8, 13, 19, 4, 6, 4, 17]} = sub
542 {["", "Just ", "another ", "Perl ", "Hacker\n"] -> [shift]};
543 $^H = hex join "" => reverse map {int ($_ / 2)} 0 .. 4}
546 ####### Overloaded constants 4
547 BEGIN {$^H {join "" => ("a" .. "z") [8, 13, 19, 4, 6, 4, 17]} = sub
548 {["", "Just ", "another ", "Perl ", "Hacker"] -> [shift]};
549 $^H = hex join "" => reverse map {int ($_ / 2)} 0 .. 4}
550 print 1, 2, 3, 4, "\n";
552 ####### Overloaded constants 5
553 BEGIN {my $x = "Knuth heals rare project\n";
554 $^H {integer} = sub {my $y = shift; $_ = substr $x => $y & 0x1F, 1;
555 $y > 32 ? uc : lc}; $^H = hex join "" => 2, 1, 1, 0, 0}
556 print 52,2,10,23,16,8,1,19,3,6,15,12,5,49,21,14,9,11,36,13,22,32,7,18,24;
559 print v74.117.115.116.32;
560 print v97.110.111.116.104.101.114.32;
561 print v80.101.114.108.32;
562 print v72.97.99.107.101.114.10;
565 print 74.117.115.116.32;
566 print 97.110.111.116.104.101.114.32;
567 print 80.101.114.108.32;
568 print 72.97.99.107.101.114.10;
571 print v74.117.115.116.32, v97.110.111.116.104.101.114.32,
572 v80.101.114.108.32, v72.97.99.107.101.114.10;
575 print 74.117.115.116.32, 97.110.111.116.104.101.114.32,
576 80.101.114.108.32, 72.97.99.107.101.114.10;
579 print v74.117.115.116.32.97.110.111.116.104.101.114.
580 v32.80.101.114.108.32.72.97.99.107.101.114.10;
583 print 74.117.115.116.32.97.110.111.116.104.101.114.
584 32.80.101.114.108.32.72.97.99.107.101.114.10;
586 ####### Symbolic references.
587 map{${+chr}=chr}map{$_=>$_^ord$"}$=+$]..3*$=/2;
588 print "$J$u$s$t $a$n$o$t$h$e$r $P$e$r$l $H$a$c$k$e$r\n";
593 $; # The return of the lone dollar?
594 {Just=>another=>Perl=>Hacker=>} # Bare block?
596 print%; # No right operand for %?
599 @;=split//=>"Joel, Preach sartre knuth\n";$;=chr 65;%;=map{$;++=>$_}
600 0,22,13,16,5,14,21,1,23,11,2,7,12,6,8,15,3,19,24,14,10,20,18,17,4,25
605 $;=$";$;{Just=>another=>Perl=>Hacker=>}=$/;print%;
608 $_ = "\112\165\163\1648\141\156\157\164\150\145\1628\120\145"
609 . "\162\1548\110\141\143\153\145\162\0128\177" and &japh;
610 sub japh {print "@_" and return if pop; split /\d/ and &japh}
613 sub _ {$_ = shift and y/b-yB-Y/a-yB-Y/ xor !@ _?
615 print and push @_ => shift and goto &{(caller (0)) [3]}}
616 split // => "KsvQtbuf fbsodpmu\ni flsI " xor & _
619 :$:=~s:$":Just$&another$&:;$:=~s:
620 :Perl$"Hacker$&:;chop$:;print$:#:
624 -:;another Perl Hacker
632 -:;another Perl Hacker
634 $:;$:=~y:;::d;print+Just.$:
637 s[$,][join$,,(split$,,($!=85))[(q[0006143730380126152532042307].
638 q[41342211132019313505])=~m[..]g]]e and y[yIbp][HJkP] and print;
639 SKIP: Platform dependent.
642 eval {die ["Just another Perl Hacker"]}; print ${$@}[$#{@${@}}]
645 eval {die ["Just another Perl Hacker\n"]}; print ${$@}[$#{@${@}}]
648 eval {die ["Just another Perl Hacker"]}; print ${${@}}[$#{@{${@}}}]
651 eval {die ["Just another Perl Hacker\n"]}; print ${${@}}[$#{@{${@}}}]
654 eval {die [[qq [Just another Perl Hacker]]]};; print
655 ${${${@}}[$#{@{${@}}}]}[$#{${@{${@}}}[$#{@{${@}}}]}]
656 SKIP: Abuses a fixed bug; what is in $#{...} must be an arrayref, not an array
658 ####### Closure returning itself.
659 $_ = "\nrekcaH lreP rehtona tsuJ"; my $chop; $chop = sub {print chop; $chop};
660 $chop -> () -> () -> () -> () -> () -> () -> () -> () -> () -> () -> () -> ()
661 -> () -> () -> () -> () -> () -> () -> () -> () -> () -> () -> () -> () -> ()
663 ####### Special blocks 1
664 BEGIN {print "Just " }
665 CHECK {print "another "}
666 INIT {print "Perl " }
667 END {print "Hacker\n"}
669 ####### Special blocks 2
670 END {print "Hacker\n"}
671 INIT {print "Perl " }
672 CHECK {print "another "}
673 BEGIN {print "Just " }
675 ####### Recursive regex.
676 my $qr = qr/^.+?(;).+?\1|;Just another Perl Hacker;|;.+$/;
680 ####### use lib 'coderef'
681 use lib sub {($\) = split /\./ => pop; print $"};
682 eval "use Just" || eval "use another" || eval "use Perl" || eval "use Hacker";
684 Just another Perl Hacker