use strict; use warnings; package Test::Deep::Isa; use Test::Deep::Cmp; sub init { my $self = shift; my $val = shift; $self->{val} = $val; } sub descend { my $self = shift; my $got = shift; return UNIVERSAL::isa($got, $self->{val}); } sub diag_message { my $self = shift; my $where = shift; return "Checking class of $where with isa()"; } 1;