-# Before `make install' is performed this script should be runnable with
-# `make test'. After `make install' it should work as `perl test.pl'
+#!/usr/bin/perl -w
-######################### We start with some black magic to print on failure.
-
-# Change 1..1 below to 1..last_test_to_print .
-# (It may become useful if the test is moved to ./t subdirectory.)
-
-BEGIN { $| = 1; print "1..7\n"; }
-END {print "not ok 1\n" unless $loaded;}
+use Test::More tests => 30;
+use strict;
use Devel::Size qw(size total_size);
-$loaded = 1;
-print "ok 1\n";
-######################### End of black magic.
+can_ok ('Devel::Size', qw/
+ size
+ total_size
+ /);
-# Insert your test code below (better if it prints "ok 13"
-# (correspondingly "not ok 13") depending on the success of chunk 13
-# of the test code):
+die ("Uhoh, test uses an outdated version of Devel::Size")
+ unless is ($Devel::Size::VERSION, '0.79_50', 'VERSION MATCHES');
+#############################################################################
+# some basic checks:
-my $x = "A string";
-my $y = "A longer string";
-if (size($x) < size($y)) {
- print "ok 2\n";
-} else {
- print "not ok 2\n";
-}
+use vars qw($foo @foo %foo);
+$foo = "12";
+@foo = (1,2,3);
+%foo = (a => 1, b => 2);
-if (total_size($x) < total_size($y)) {
- print "ok 3\n";
-} else {
- print "not ok 3\n";
-}
+my $x = "A string";
+my $y = "A much much longer string"; # need to be at least 7 bytes longer for 64 bit
+cmp_ok(size($x), '<', size($y), 'size() of strings');
+cmp_ok(total_size($x), '<', total_size($y), 'total_size() of strings');
my @x = (1..4);
-my @y = (1..10);
+my @y = (1..200);
-if (size(\@x) < size(\@y)) {
- print "ok 4\n";
-} else {
- print "not ok 4\n";
-}
+my $size_1 = total_size(\@x);
+my $size_2 = total_size(\@y);
-if (total_size(\@x) < total_size(\@y)) {
- print "ok 5\n";
-} else {
- print "not ok 5\n";
-}
+cmp_ok($size_1, '<', $size_2, 'size() of array refs');
+
+# the arrays alone shouldn't be the same size
+$size_1 = size(\@x);
+$size_2 = size(\@y);
+
+isnt ( $size_1, $size_2, 'size() of array refs');
+
+#############################################################################
+# IV vs IV+PV (bug #17586)
+
+$x = 12;
+$y = 12; $y .= '';
+
+$size_1 = size($x);
+$size_2 = size($y);
+cmp_ok($size_1, '<', $size_2, ' ."" makes string longer');
+
+#############################################################################
# check that the tracking_hash is working
my($a,$b) = (1,2);
my @ary1 = (\$a, \$a);
my @ary2 = (\$a, \$b);
-if (total_size(\@ary1) < total_size(\@ary2)) {
- print "ok 6\n";
-} else {
- print "not ok 6\n";
-}
+cmp_ok(total_size(\@ary1), '<', total_size(\@ary2),
+ 'the tracking hash is working');
+#############################################################################
# check that circular references don't mess things up
my($c1,$c2); $c2 = \$c1; $c1 = \$c2;
-if( total_size($c1) == total_size($c2) ) {
- print "ok 7\n";
-} else {
- print "not ok 7\n";
+is (total_size($c1), total_size($c2), 'circular references');
+
+##########################################################
+# RT#14849 (& RT#26781 and possibly RT#29238?)
+cmp_ok( total_size( sub{ do{ my $t=0 }; } ), '>', 0,
+ 'total_size( sub{ my $t=0 } ) > 0' );
+
+# CPAN RT #58484 and #58485
+cmp_ok(total_size(\&total_size), '>', 0, 'total_size(\&total_size) > 0');
+
+use constant LARGE => 'N' x 8192;
+
+cmp_ok (total_size(\&LARGE), '>', 8192,
+ 'total_size for a constant includes the constant');
+
+{
+ my $a = [];
+ my $b = \$a;
+ # Scalar::Util isn't in the core before 5.7.something.
+ # The test isn't really testing anything without the weaken(), but it
+ # isn't counter-productive or harmful to run it anyway.
+ unless (eval {
+ require Scalar::Util;
+ # making a weakref upgrades the target to PVMG and adds magic
+ Scalar::Util::weaken($b);
+ 1;
+ }) {
+ die $@ if $] >= 5.008;
+ }
+
+ is(total_size($a), total_size([]),
+ 'Any intial reference is dereferenced and discarded');
+}
+
+# Must call direct - avoid all copying:
+foreach(['undef', total_size(undef)],
+ ['no', total_size(1 == 0)],
+ ['yes', total_size(1 == 1)],
+ ) {
+ my ($name, $size) = @$_;
+ is($size, 0,
+ "PL_sv_$name is interpeter wide, so not counted as part of the structure's size");
}
+{
+ # SvOOK stuff
+ my $uurk = "Perl Rules";
+ # This may upgrade the scalar:
+ $uurk =~ s/Perl//;
+ $uurk =~ s/^/Perl/;
+ my $before_size = total_size($uurk);
+ my $before_length = length $uurk;
+ cmp_ok($before_size, '>', $before_length, 'Size before is sane');
+ $uurk =~ s/Perl //;
+ is(total_size($uurk), $before_size,
+ "Size doesn't change because OOK is used");
+ cmp_ok(length $uurk, '<', $before_size, 'but string is shorter');
+}
+
+sub shared_hash_keys {
+ my %h = @_;
+ my $one = total_size([keys %h]);
+ cmp_ok($one, '>', 0, 'Size of one entry is sane');
+ my $two = total_size([keys %h, keys %h]);
+ cmp_ok($two, '>', $one, 'Two take more space than one');
+ my $increment = $two - $one;
+ is(total_size([keys %h, keys %h, keys %h]), $one + 2 * $increment,
+ 'Linear size increase for three');
+ return $increment;
+}
+
+{
+ my $small = shared_hash_keys(Perl => 'Rules');
+ my $big = shared_hash_keys('x' x 1024, '');
+ SKIP: {
+ skip("[keys %h] doesn't copy as shared hash key scalars prior to 5.10.0",
+ 1) if $] < 5.010;
+ is ($small, $big, 'The "shared" part of shared hash keys is spotted');
+ }
+}
+
+{
+ use vars '%DANG_DANG_DANG_DANG_DANG_DANG_DANG_DANG_DANG';
+ my $hash_size = total_size(\%DANG_DANG_DANG_DANG_DANG_DANG_DANG_DANG_DANG);
+ cmp_ok($hash_size, '>', 0, 'Hash size is sane');
+ my $stash_size
+ = total_size(\%DANG_DANG_DANG_DANG_DANG_DANG_DANG_DANG_DANG::);
+ cmp_ok($stash_size, '>',
+ $hash_size + length 'DANG_DANG_DANG_DANG_DANG_DANG_DANG_DANG_DANG',
+ 'Stash size is larger than hash size plus length of the name');
+}
+
+{
+ my %h = (Perl => 'Rules');
+ my $hash_size = total_size(\%h);
+ cmp_ok($hash_size, '>', 0, 'Hash size is sane');
+ my $a = keys %h;
+ if ($] < 5.010) {
+ is(total_size(\%h), $hash_size,
+ "Creating iteration state doesn't need to allocate storage");
+ # because all hashes carry the overhead of this storage from creation
+ } else {
+ cmp_ok(total_size(\%h), '>', $hash_size,
+ 'Creating iteration state allocates storage');
+ }
+}
projects / p5sagit/Devel-Size.git / blobdiff