1use Test::More tests => 7; 2 3BEGIN { 4 if ($ENV{PERL_CORE}) { 5 chdir('t') if -d 't'; 6 @INC = qw(../lib); 7 } 8} 9 10BEGIN { use_ok('NEXT') }; 11my $order = 0; 12 13package A; 14@ISA = qw/B C D/; 15 16sub test { ::ok(++$order==1,"test A"); $_[0]->NEXT::UNSEEN::test; 1} 17 18package B; 19@ISA = qw/D C/; 20sub test { ::ok(++$order==2,"test B"); $_[0]->NEXT::UNSEEN::test; 1} 21 22package C; 23@ISA = qw/D/; 24sub test { ::ok(++$order==4,"test C"); $_[0]->NEXT::UNSEEN::test; 1} 25 26package D; 27 28sub test { ::ok(++$order==3,"test D"); $_[0]->NEXT::UNSEEN::test; 1} 29 30package main; 31 32my $foo = {}; 33 34bless($foo,"A"); 35 36eval{ $foo->test } 37 ? pass("Correctly survives after C") 38 : fail("Shouldn't die on missing ancestor"); 39 40package Diamond::Base; 41my $seen; 42sub test { 43 $seen++ ? ::fail("Can't visit inherited test twice") 44 : ::pass("First diamond is okay"); 45 shift->NEXT::UNSEEN::test; 46} 47 48package Diamond::Left; @ISA = qw[Diamond::Base]; 49package Diamond::Right; @ISA = qw[Diamond::Base]; 50package Diamond::Top; @ISA = qw[Diamond::Left Diamond::Right]; 51 52package main; 53 54Diamond::Top->test; 55