root/branches/release-40/t/lib/Test/Deep/HashKeysOnly.pm @ 2583

use strict;
use warnings;

package Test::Deep::HashKeysOnly;

use Test::Deep::Ref;

sub init
{
        my $self = shift;

        my %keys;
        @keys{@_} = ();
        $self->{val} = \%keys;
        $self->{keys} = [sort @_];
}

sub descend
{
        my $self = shift;
        my $hash = shift;

        my $data = $self->data;
        my $exp = $self->{val};
        my %got;
        @got{keys %$hash} = ();

        my @missing;
        my @extra;

        while (my ($key, $value) = each %$exp)
        {
                if (exists $got{$key})
                {
                        delete $got{$key};
                }
                else
                {
                        push(@missing, $key);
                }
        }

        my @diags;
        if (@missing and (not $self->ignoreMissing))
        {
                push(@diags, "Missing: ".nice_list(\@missing));
        }

        if (%got and (not $self->ignoreExtra))
        {
                push(@diags, "Extra: ".nice_list([keys %got]));
        }

        if (@diags)
        {
                $data->{diag} = join("\n", @diags);
                return 0;
        }

        return 1;
}

sub diagnostics
{
        my $self = shift;
        my ($where, $last) = @_;

        my $type = $self->{IgnoreDupes} ? "Set" : "Bag";

        my $error = $last->{diag};
        my $diag = <<EOM;
Comparing hash keys of $where
$error
EOM

        return $diag;
}

sub nice_list
{
        my $list = shift;

        return join(", ",
                (map {"'$_'"} sort @$list),
        );
}

sub ignoreMissing
{
        return 0;
}

sub ignoreExtra
{
        return 0;
}

package Test::Deep::SuperHashKeysOnly;

use base 'Test::Deep::HashKeysOnly';

sub ignoreMissing
{
        return 0;
}

sub ignoreExtra
{
        return 1;
}

package Test::Deep::SubHashKeysOnly;

use base 'Test::Deep::HashKeysOnly';

sub ignoreMissing
{
        return 1;
}

sub ignoreExtra
{
        return 0;
}

1;