Remove dubious thread dirhandle cloning test

Author: Leont

t/op/threads-dirh.t

@@ -13,16 +13,12 @@ BEGIN {
      skip_all_if_miniperl("no dynamic loading on miniperl, no threads");
      skip_all("runs out of memory on some EBCDIC") if $ENV{PERL_SKIP_BIG_MEM_TESTS};
 
-     plan(6);
+     plan(1);
 }
 
 use strict;
 use warnings;
 use threads;
-use threads::shared;
-use File::Path;
-use File::Spec::Functions qw 'updir catdir';
-use Cwd 'getcwd';
 
 # Basic sanity check: make sure this does not crash
 fresh_perl_is <<'# this is no comment', 'ok', {}, 'crash when duping dirh';
@@ -31,101 +27,3 @@ fresh_perl_is <<'# this is no comment', 'ok', {}, 'crash when duping dirh';
    async{}->join for 1..2;
    print "ok";
 # this is no comment
-
-my $dir;
-SKIP: {
- skip "telldir or seekdir not defined on this platform", 5
-    if !$Config::Config{d_telldir} || !$Config::Config{d_seekdir};
- my $skip = sub {
-   chdir($dir);
-   chdir updir;
-   skip $_[0], 5
- };
-
- if(!$Config::Config{d_fchdir} && $^O ne "MSWin32") {
-  $::TODO = 'dir handle cloning currently requires fchdir on non-Windows platforms';
- }
-
- my @w :shared; # warnings accumulator
- local $SIG{__WARN__} = sub { push @w, $_[0] };
-
- $dir = catdir getcwd(), "thrext$$" . int rand() * 100000;
-
- rmtree($dir) if -d $dir;
- mkdir($dir);
-
- # Create a dir structure like this:
- #   $dir
- #     |
- #     `- toberead
- #            |
- #            +---- thrit
- #            |
- #            +---- rile
- #            |
- #            `---- zor
-
- chdir($dir);
- mkdir 'toberead';
- chdir 'toberead';
- {open my $fh, ">thrit" or &$skip("Cannot create file thrit")}
- {open my $fh, ">rile" or &$skip("Cannot create file rile")}
- {open my $fh, ">zor" or &$skip("Cannot create file zor")}
- chdir updir;
-
- # Then test that dir iterators are cloned correctly.
-
- opendir my $toberead, 'toberead';
- my $start_pos = telldir $toberead;
- my @first_2 = (scalar readdir $toberead, scalar readdir $toberead);
- my @from_thread = @{; async { [readdir $toberead ] } ->join };
- my @from_main = readdir $toberead;
- is join('-', sort @from_thread), join('-', sort @from_main),
-     'dir iterator is copied from one thread to another';
- like
-   join('-', "", sort(@first_2, @from_thread), ""),
-   qr/(?<!-rile)-rile-thrit-zor-(?!zor-)/i,
-  'cloned iterator iterates exactly once over everything not already seen';
-
- seekdir $toberead, $start_pos;
- readdir $toberead for 1 .. @first_2+@from_thread;
- {
-  local $::TODO; # This always passes when dir handles are not cloned.
-  is
-    async { readdir $toberead // 'undef' } ->join, 'undef',
-   'cloned dir iterator that points to the end of the directory'
-  ;
- }
-
- # Make sure the cloning code can handle file names longer than 255 chars
- SKIP: {
-  chdir 'toberead';
-  open my $fh,
-    ">floccipaucinihilopilification-"
-   . "pneumonoultramicroscopicsilicovolcanoconiosis-"
-   . "lopadotemachoselachogaleokranioleipsanodrimypotrimmatosilphiokarabo"
-   . "melitokatakechymenokichlepikossyphophattoperisteralektryonoptokephal"
-   . "liokinklopeleiolagoiosiraiobaphetraganopterygon"
-    or
-     chdir updir,
-     skip("OS does not support long file names (and I mean *long*)", 1);
-  chdir updir;
-  opendir my $dirh, "toberead";
-  my $test_name
-    = "dir iterators can be cloned when the next fn > 255 chars";
-  while() {
-   my $pos = telldir $dirh;
-   my $fn = readdir($dirh);
-   if(!defined $fn) { fail($test_name); last SKIP; }
-   if($fn =~ 'lagoio') { 
-    seekdir $dirh, $pos;
-    last;
-   }
-  }
-  is length async { scalar readdir $dirh } ->join, 258, $test_name;
- }
-
- is scalar @w, 0, 'no warnings during all that' or diag @w;
- chdir updir;
-}
-rmtree($dir);