NAME

       Test2::Require::Fork - Skip a test file unless the system supports forking

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 Test2::Require::Fork;

           ... Code that forks ...

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 mimic 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 error-prone. 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

       Test2::Require::CanReallyfork
           Similar to this module, but will skip on any perl that only has fork emulation.

       Test2::Require::CanThread
           Skip the test file if the system does not support threads.

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>

COPYRIGHT

       Copyright 2017 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/