#!/usr/bin/perl -w # Test is_deeply and friends with circular data structures [rt.cpan.org 7289] BEGIN { if( $ENV{PERL_CORE} ) { chdir 't'; @INC = ('../lib', 'lib'); } else { unshift @INC, 't/lib'; } } use strict; use Test::More tests => 11; my $a1 = [ 1, 2, 3 ]; push @$a1, $a1; my $a2 = [ 1, 2, 3 ]; push @$a2, $a2; is_deeply $a1, $a2; ok( eq_array ($a1, $a2) ); ok( eq_set ($a1, $a2) ); my $h1 = { 1=>1, 2=>2, 3=>3 }; $h1->{4} = $h1; my $h2 = { 1=>1, 2=>2, 3=>3 }; $h2->{4} = $h2; is_deeply $h1, $h2; ok( eq_hash ($h1, $h2) ); my ($r, $s); $r = \$r; $s = \$s; ok( eq_array ([$s], [$r]) ); { # Classic set of circular scalar refs. my($a,$b,$c); $a = \$b; $b = \$c; $c = \$a; my($d,$e,$f); $d = \$e; $e = \$f; $f = \$d; is_deeply( $a, $a ); is_deeply( $a, $d ); } { # rt.cpan.org 11623 # Make sure the circular ref checks don't get confused by a reference # which is simply repeating. my $a = {}; my $b = {}; my $c = {}; is_deeply( [$a, $a], [$b, $c] ); is_deeply( { foo => $a, bar => $a }, { foo => $b, bar => $c } ); is_deeply( [\$a, \$a], [\$b, \$c] ); }