Test2::Compare::Custom(3) User Contributed Perl Documentation Test2::Compare::Custom(3)

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

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.

my $cus = Test2::Compare::Custom->new(
    name => 'IsRef',
    operator => 'ref(...)',
    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"
);

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.

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

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

Chad Granum <exodist@cpan.org>

Chad Granum <exodist@cpan.org>

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/

2021-07-27 perl v5.34.0