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.\" ========================================================================
.\"
.IX Title "Test2::Require 3pm"
.TH Test2::Require 3pm "2016-12-18" "perl v5.24.1" "User Contributed Perl Documentation"
.\" For nroff, turn off justification.  Always turn off hyphenation; it makes
.\" way too many mistakes in technical documents.
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.SH "NAME"
Test2::Require \- Base class and documentation for skip\-unless type test
packages.
.SH "DESCRIPTION"
.IX Header "DESCRIPTION"
Test2::Require::* packages are packages you load to ensure your test file is
skipped unless a specific requirement is met. Modules in this namespace may
subclass Test2::Require if they wish, but it is not strictly necessary to do
so.
.SH "HOW DO I WRITE A 'REQUIRE' MODULE?"
.IX Header "HOW DO I WRITE A 'REQUIRE' MODULE?"
.SS "\s-1AS A SUBCLASS\s0"
.IX Subsection "AS A SUBCLASS"
.Vb 3
\&    package Test2::Require::Widget;
\&    use strict;
\&    use warnings;
\&
\&    use base \*(AqTest2::Require\*(Aq;
\&
\&    sub HAVE_WIDGETS { ... };
\&
\&    sub skip {
\&        my $class = shift;
\&        my @import_args = @_;
\&
\&        if (HAVE_WIDGETS()) {
\&            # We have widgets, do not skip
\&            return undef;
\&        }
\&        else {
\&            # No widgets, skip the test
\&            return "Skipped because there are no widgets" unless HAVE_WIDGETS();
\&        }
\&    }
\&
\&    1;
.Ve
.PP
A subclass of Test2::Require simply needs to implement a \f(CW\*(C`skip()\*(C'\fR method.
This method will receive all import arguments. This method should return undef
if the test should run, and should return a reason for skipping if the test
should be skipped.
.SS "STAND-ALONE"
.IX Subsection "STAND-ALONE"
If you do not wish to subclass Test2::Require then you should write an
\&\f(CW\*(C`import()\*(C'\fR method:
.PP
.Vb 3
\&    package Test2::Require::Widget;
\&    use strict;
\&    use warnings;
\&
\&    use Test2::API qw/context/;
\&
\&    sub HAVE_WIDGETS { ... };
\&
\&    sub import {
\&        my $class = shift;
\&
\&        # Have widgets, should run.
\&        return if HAVE_WIDGETS();
\&
\&        # Use the context object to create the event
\&        my $ctx = context();
\&        $ctx\->plan(0, SKIP => "Skipped because there are no widgets");
\&        $ctx\->release;
\&    }
\&
\&    1;
.Ve
.SH "SOURCE"
.IX Header "SOURCE"
The source code repository for Test2\-Suite can be found at
\&\fIhttp://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 2016 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