package Tie::DxHash::Child; use strict; use vars qw(@ISA); use Test; BEGIN { plan tests => 2 } use Tie::DxHash; @ISA = qw(Tie::DxHash); my (%obj); tie %obj, 'Tie::DxHash::Child'; %obj = ( r => 'red', g => 'green', g => 'greenish', b => 'blue' ); undef %obj; ok(1); ok( keys %obj, 0 );