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.\" ========================================================================
.\"
.IX Title "Test2::Compare::Custom 3"
.TH Test2::Compare::Custom 3 "2019-05-18" "perl v5.10.1" "User Contributed Perl Documentation"
.\" For nroff, turn off justification.  Always turn off hyphenation; it makes
.\" way too many mistakes in technical documents.
.if n .ad l
.nh
.SH "NAME"
Test2::Compare::Custom \- Custom field check for comparisons.
.SH "DESCRIPTION"
.IX Header "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.
.SH "SYNOPSIS"
.IX Header "SYNOPSIS"
.Vb 8
\&    my $cus = Test2::Compare::Custom\->new(
\&        name => \*(AqIsRef\*(Aq,
\&        operator => \*(Aqref(...)\*(Aq,
\&        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 => \*(Aqnotref\*(Aq, b => 2},
\&        {a => 1, ref => $cus,     b => 2},
\&        "This will fail"
\&    );
.Ve
.SH "ARGUMENTS"
.IX Header "ARGUMENTS"
Your custom sub will be passed 4 arguments in a hash:
.PP
.Vb 5
\&    code => sub {
\&        my %args = @_;
\&        # provides got, exists, operator, name
\&        return ref($args{got}) ? 1 : 0;
\&    },
.Ve
.PP
\&\f(CW$_\fR is also localized to \f(CW\*(C`got\*(C'\fR to make it easier for those who need to use
regexes.
.IP "got" 4
.IX Item "got"
.PD 0
.ie n .IP "$_" 4
.el .IP "\f(CW$_\fR" 4
.IX Item "$_"
.PD
The value to be checked.
.IP "exists" 4
.IX Item "exists"
This will be a boolean. This will be true if \f(CW\*(C`got\*(C'\fR exists at all. If
\&\f(CW\*(C`exists\*(C'\fR is false then it means \f(CW\*(C`got\*(C'\fR is not simply undef, but doesn't
exist at all (think checking the value of a hash key that does not exist).
.IP "operator" 4
.IX Item "operator"
The operator specified at construction.
.IP "name" 4
.IX Item "name"
The name provided at construction.
.SH "METHODS"
.IX Header "METHODS"
.ie n .IP "$code = $cus\->code" 4
.el .IP "\f(CW$code\fR = \f(CW$cus\fR\->code" 4
.IX Item "$code = $cus->code"
Returns the coderef provided at construction.
.ie n .IP "$name = $cus\->name" 4
.el .IP "\f(CW$name\fR = \f(CW$cus\fR\->name" 4
.IX Item "$name = $cus->name"
Returns the name provided at construction.
.ie n .IP "$op = $cus\->operator" 4
.el .IP "\f(CW$op\fR = \f(CW$cus\fR\->operator" 4
.IX Item "$op = $cus->operator"
Returns the operator provided at construction.
.ie n .IP "$bool = $cus\->verify(got => $got, exists => $bool)" 4
.el .IP "\f(CW$bool\fR = \f(CW$cus\fR\->verify(got => \f(CW$got\fR, exists => \f(CW$bool\fR)" 4
.IX Item "$bool = $cus->verify(got => $got, exists => $bool)"
.SH "SOURCE"
.IX Header "SOURCE"
The source code repository for Test2\-Suite can be found at
\&\fIhttps://github.com/Test\-More/Test2\-Suite/\fR.
.SH "MAINTAINERS"
.IX Header "MAINTAINERS"
.IP "Chad Granum <exodist@cpan.org>" 4
.IX Item "Chad Granum <exodist@cpan.org>"
.SH "AUTHORS"
.IX Header "AUTHORS"
.PD 0
.IP "Chad Granum <exodist@cpan.org>" 4
.IX Item "Chad Granum <exodist@cpan.org>"
.PD
.SH "COPYRIGHT"
.IX Header "COPYRIGHT"
Copyright 2018 Chad Granum <exodist@cpan.org>.
.PP
This program is free software; you can redistribute it and/or
modify it under the same terms as Perl itself.
.PP
See \fIhttp://dev.perl.org/licenses/\fR
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