Test::Stream::Plugin::CanFork(3)

NAME
Test::Stream::Plugin::CanFork - Skip a test file unless the system supports forking

DEPRECATED
This distribution is deprecated in favor of Test2, Test2::Suite, and Test2::Workflow.

See Test::Stream::Manual::ToTest2 for a conversion guide.

DESCRIPTION
It is fairly common to write tests that need to fork. Not all systems support forking. This library does the hard work of checking if forking is supported on the current system. If forking is not supported then this will skip all tests and exit true.

SYNOPSIS
    use Test::Stream::Plugin::CanFork;

    ... Code that forks ...

or

    use Test::Stream::Plugin::CanFork real => 1;

    ... Code that requires true fork support (not emulated) ...

EXPLANATION
Checking if the current system supports forking is not simple, here is an example of how to do it:

    use Config;

    sub CAN_FORK {
        return 1 if $Config{d_fork};

        # Some platforms use ithreads to mimick forking
        return 0 unless $^O eq 'MSWin32' || $^O eq 'NetWare';
        return 0 unless $Config{useithreads};
        return 0 unless $Config{ccflags} =~ /-DPERL_IMPLICIT_SYS/;

        # Threads are not reliable before 5.008001
        return 0 unless $] >= 5.008001;

        # Devel::Cover currently breaks with threads
        return 0 if $INC{'Devel/Cover.pm'};
        return 1;
    }

Duplicating this non-trivial code in all tests that need to fork is dumb. It is easy to forget bits, or get it wrong. On top of these checks you also need to tell the harness that no tests should run and why.

SEE ALSO

Test::Stream::Plugin::CanThread
    Skip the test file if the system does not support threads.

Test::Stream
    Test::Stream::Plugin::CanFork uses Test::Stream under the hood.

SOURCE
The source code repository for Test::Stream can be found at http://github.com/Test-More/Test-Stream/.

MAINTAINERS

Chad Granum <exodist@cpan.org>

AUTHORS

Chad Granum <exodist@cpan.org>

COPYRIGHT
Copyright 2015 Chad Granum <exodist7@gmail.com>.

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/