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#!/usr/bin/perl -w
use strict;
use strict;
use Carp;
use File::Spec;
use lib File::Spec->catdir(File::Spec->curdir,"t");
use tools;
$|=1;
my $DEBUG=0;
use XML::Twig;
# only display warnings, test is too unreliable (especially under Devel::Cover) to trust
my $mem_size= mem_size();
unless( $mem_size)
{ print "1..1\nok 1\n";
warn "skipping: memory size not available\n";;
exit;
}
if( !XML::Twig::_weakrefs())
{ print "1..1\nok 1\n";
warn "skipping: weaken not available\n";;
exit;
}
my $long_test= $ARGV[0] && $ARGV[0] eq '-L';
my $conf= $long_test ? { iter => 10, p => 1000 }
: { iter => 5, p => 500 }
;
$conf->{normal}= $conf->{p} * $conf->{iter};
$conf->{normal_html}= $conf->{normal} * 2;
my $TMAX=6;
print "1..$TMAX\n";
my $warn=0;
my $paras= join '', map { qq{<p>lorem ipsus whatever <i id="i$_">(clever latin stuff) no $_</i></p>}} 1..$conf->{p};
my $test_nb=1;
foreach my $wr (0..1)
{
# first pass if with weakrefs, second without
my $wrm='';
if( $wr)
{ XML::Twig::_set_weakrefs( 0);
$wrm= " (no weak references, disregard unless running with a _really_ old perl, like pre 5.8)";
}
{ my $xml= qq{<doc>$paras</doc>};
XML::Twig->new->parse( $xml);
my $before= mem_size();
for (1..$conf->{iter})
{ my $t= XML::Twig->new->parse( $xml);
if( $wr)
{ really_clear( $t) }
}
my $after= mem_size();
if( $after - $before > $conf->{normal})
{ warn "test $test_nb: possible memory leak parsing xml ($after > $before)$wrm"; $warn++; }
elsif( $long_test)
{ warn "$before => $after\n"; }
ok(1, "testing memory leaks for xml parsing$wrm");
$test_nb++;
}
{ if( XML::Twig::_use( 'HTML::TreeBuilder', 3.13))
{ my $html= qq{<html><head><title>with HTB</title></head><body>$paras</body></html>};
XML::Twig->new->parse_html( $html);
my $before= mem_size();
for (1..$conf->{iter}) { XML::Twig->new->parse_html( $html); }
my $after= mem_size();
if( $after - $before > $conf->{normal_html})
{ warn "test $test_nb: possible memory leak parsing html ($after > $before)$wrm"; $warn++; }
elsif( $long_test)
{ warn "$before => $after\n"; }
ok(1, "testing memory leaks for html parsing$wrm");
}
else
{ skip( 1, "need HTML::TreeBuilder 3.13+"); }
$test_nb++;
}
{ if( XML::Twig::_use( 'HTML::Tidy'))
{ my $html= qq{<html><head><title>with tidy</title></head><body>$paras</body></html>};
XML::Twig->new( use_tidy => 1)->parse_html( $html);
my $before= mem_size();
for (1..$conf->{iter}) { XML::Twig->new( use_tidy => 1)->parse_html( $html); }
my $after= mem_size();
if( $after - $before > $conf->{normal_html})
{ warn "test $test_nb: possible memory leak parsing html ($after > $before)$wrm"; $warn++; }
elsif( $long_test)
{ warn "$before => $after\n"; }
ok(1, "testing memory leaks for html parsing using HTML::Tidy$wrm");
}
else
{ skip( 1, "need HTML::Tidy"); }
$test_nb++;
}
}
if( $warn)
{ warn "\nnote that memory leaks can happen even if the module itself doesn't leak, if running",
"\ntests under Devel::Cover for example. So do not panic if you get a warning here.\n";
}
sub mem_size
{ open( STATUS, "/proc/$$/status") or return;
my( $size)= map { m{^VmSize:\s+(\d+\s+\w+)} } <STATUS>;
$size=~ s{ kB}{};
#warn "data size found: $size\n";
return $size;
}
sub really_clear
{ my( $t)= shift;
my $elt= $t->root->DESTROY;
delete $t->{twig_dtd};
delete $t->{twig_doctype};
delete $t->{twig_xmldecl};
delete $t->{twig_root};
delete $t->{twig_parser};
return;
local $SIG{__WARN__} = sub {};
while( $elt)
{ my $nelt= nelt( $elt);
$elt->del_id( $t);
foreach ( qw(gi att empty former)) { undef $elt->{$_}; delete $elt->{$_}; }
$elt->delete;
$elt= $nelt;
}
$t->dispose;
}
sub nelt
{ my( $elt)= @_;
if( $elt->_first_child) { return deepest_child( $elt); }
if( $elt->_next_sibling) { return deepest_child( $elt->_next_sibling); }
return $elt->parent;
}
sub deepest_child
{ my( $elt)= @_;
while( $elt->_first_child) { $elt= $elt->_first_child; }
return $elt;
}
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