NAME

       Test2::Compare::Custom - Custom field check for comparisons.

DESCRIPTION

       Sometimes you want to do something complicated or unusual when validating a field nested
       inside a deep data structure. You could pull it out of the structure and test it
       separately, or you can use this to embed the check. This provides a way for you to write
       custom checks for fields in deep comparisons.

SYNOPSIS

           my $cus = Test2::Compare::Custom->new(
               name => 'IsRef',
               operator => 'ref(...)',
               stringify_got => 1,
               code => sub {
                   my %args = @_;
                   return $args{got} ? 1 : 0;
               },
           );

           # Pass
           is(
               { a => 1, ref => {},   b => 2 },
               { a => 1, ref => $cus, b => 2 },
               "This will pass"
           );

           # Fail
           is(
               {a => 1, ref => 'notref', b => 2},
               {a => 1, ref => $cus,     b => 2},
               "This will fail"
           );

ARGUMENTS

       Your custom sub will be passed 4 arguments in a hash:

           code => sub {
               my %args = @_;
               # provides got, exists, operator, name
               return ref($args{got}) ? 1 : 0;
           },

       $_ is also localized to "got" to make it easier for those who need to use regexes.

       got
       $_  The value to be checked.

       exists
           This will be a boolean. This will be true if "got" exists at all. If "exists" is false
           then it means "got" is not simply undef, but doesn't exist at all (think checking the
           value of a hash key that does not exist).

       operator
           The operator specified at construction.

       name
           The name provided at construction.

METHODS

       $code = $cus->code
           Returns the coderef provided at construction.

       $name = $cus->name
           Returns the name provided at construction.

       $op = $cus->operator
           Returns the operator provided at construction.

       $stringify = $cus->stringify_got
           Returns the stringify_got flag provided at construction.

       $bool = $cus->verify(got => $got, exists => $bool)

SOURCE

       The source code repository for Test2-Suite can be found at
       https://github.com/Test-More/Test2-Suite/.

MAINTAINERS

       Chad Granum <exodist@cpan.org>

AUTHORS

       Chad Granum <exodist@cpan.org>
       Daniel Böhmer <dboehmer@cpan.org>

COPYRIGHT

       Copyright 2018 Chad Granum <exodist@cpan.org>.

       This program is free software; you can redistribute it and/or modify it under the same
       terms as Perl itself.

       See http://dev.perl.org/licenses/