Initial Commit

database/perl/vendor/lib/Test2/Compare/Undef.pm

@@ -0,0 +1,83 @@
+package Test2::Compare::Undef;
+use strict;
+use warnings;
+
+use Carp qw/confess/;
+
+use base 'Test2::Compare::Base';
+
+our $VERSION = '0.000139';
+
+use Test2::Util::HashBase;
+
+# Overloads '!' for us.
+use Test2::Compare::Negatable;
+
+sub name { '<UNDEF>' }
+
+sub operator {
+    my $self = shift;
+
+    return 'IS NOT' if $self->{+NEGATE};
+    return 'IS';
+}
+
+sub verify {
+    my $self = shift;
+    my %params = @_;
+    my ($got, $exists) = @params{qw/got exists/};
+
+    return 0 unless $exists;
+
+    return !defined($got) unless $self->{+NEGATE};
+    return defined($got);
+}
+
+1;
+
+__END__
+
+=pod
+
+=encoding UTF-8
+
+=head1 NAME
+
+Test2::Compare::Undef - Check that something is undefined
+
+=head1 DESCRIPTION
+
+Make sure something is undefined in a comparison. You can also check that
+something is defined.
+
+=head1 SOURCE
+
+The source code repository for Test2-Suite can be found at
+F<https://github.com/Test-More/Test2-Suite/>.
+
+=head1 MAINTAINERS
+
+=over 4
+
+=item Chad Granum E<lt>exodist@cpan.orgE<gt>
+
+=back
+
+=head1 AUTHORS
+
+=over 4
+
+=item Chad Granum E<lt>exodist@cpan.orgE<gt>
+
+=back
+
+=head1 COPYRIGHT
+
+Copyright 2018 Chad Granum E<lt>exodist@cpan.orgE<gt>.
+
+This program is free software; you can redistribute it and/or
+modify it under the same terms as Perl itself.
+
+See F<http://dev.perl.org/licenses/>
+
+=cut