#!/usr/bin/perl -w
use strict;
use Test::More tests => 18;
use Devel::Size ':all';
require Tie::Scalar;
{
my $string = 'Perl Rules';
my $before_size = total_size($string);
is($string =~ /Perl/g, 1, 'It had better match');
cmp_ok($before_size, '>', length $string,
'Our string has a non-zero length');
cmp_ok(total_size($string), '>', $before_size,
'size increases due to magic');
}
SKIP: {
# bug in perl added in blead by commit 815f25c6e302f84e, fixed in commit
# f5c235e79ea25787, merged to maint-5.8 as 0710cc63c26afd0c and
# 8298b2e171ce84cf respectively.
skip("This triggers a formline assertion on $]", 4)
if $] > 5.008000 && $] < 5.008003;
my $string = 'Perl Rules';
my $before_size = total_size($string);
formline $string;
my $compiled_size = total_size($string);
cmp_ok($before_size, '>', length $string,
'Our string has a non-zero length');
cmp_ok($compiled_size, '>', $before_size,
'size increases due to magic (and the compiled state)');
# Not fully sure why (didn't go grovelling) but need to use a temporary to
# avoid the magic being copied.
$string = '' . $string;
my $after_size = total_size($string);
cmp_ok($after_size, '>', $before_size, 'Still larger than initial size');
cmp_ok($after_size, '<', $compiled_size, 'size decreases due to unmagic');
}
{
my $string = 'Perl Rules';
my $before_size = total_size($string);
cmp_ok($before_size, '>', length $string,
'Our string has a non-zero length');
tie $string, 'Tie::StdScalar';
my $after_size = total_size($string);
cmp_ok($after_size, '>', $before_size, 'size increases due to magic');
is($string, undef, 'No value yet');
my $small_size = total_size($string);
# This is defineately cheating, in that we're poking inside the
# implementation of Tie::StdScalar, but if we just write to $string, the way
# magic works, the (nice long) value is first written to the regular scalar,
# then picked up by the magic. So it grows, which defeats the purpose of the
# test.
${tied $string} = 'X' x 1024;
cmp_ok(total_size($string), '>', $small_size + 1024,
'the magic object is counted');
}
SKIP: {
skip("v-strings didn't use magic before 5.8.1", 2) if $] < 5.008001;
my $v = eval 'v' . (0 x 1024);
is($v, "\0", 'v-string is \0');
cmp_ok(total_size($v), '>', 1024, 'total_size follows MG_PTR');
}
SKIP: {
skip("no UTF-8 caching before 5.8.1", 5) if $] < 5.008001;
my $string = "a\x{100}b";
my $before_size = total_size($string);
cmp_ok($before_size, '>', 0, 'Our string has a non-zero length');
is(length $string, 3, 'length is sane');
my $with_magic = total_size($string);
cmp_ok($with_magic, '>', $before_size, 'UTF-8 caching fired and counted');
is(index($string, "b"), 2, 'b is where we expect it');
cmp_ok(total_size($string), '>', $with_magic,
'UTF-8 caching length table now present');
}