Michael G Schwern > Test-Fork > Test::Fork

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NAME ^

Test::Fork - test code which forks

SYNOPSIS ^

    use Test::More tests => 4;
    use Test::Fork;
    
    fork_ok(2, sub{
        pass("Test in the child process");
        pass("Another test in the child process");
    });
    
    pass("Test in the parent");

DESCRIPTION ^

THIS IS ALPHA CODE! The implementation is unreliable and the interface is subject to change.

Because each test has a number associated with it, testing code which forks is problematic. Coordinating the test number amongst the parent and child processes is complicated. Test::Fork provides a function to smooth over the complications.

Functions

Each function is exported by default.

fork_ok

    my $child_pid = fork_ok( $num_tests, sub {
        ...child test code...
    });

Runs the given child test code in a forked process. Returns the pid of the forked child process, or false if the fork fails.

$num_tests is the number of tests in your child test code. Consider it to be a sub-plan.

fork_ok() itself is a test, if the fork fails it will fail. fork_ok() test does not count towards your $num_tests.

    # This is three tests.
    fork_ok( 2, sub {
        is $foo, $bar;
        ok Something->method;
    });

The children are automatically reaped.

CAVEATS ^

The failure of tests in a child process cannot be detected by the parent. Therefore, the normal end-of-test reporting done by Test::Builder will not notice failed child tests.

Test::Fork turns off test numbering in order to avoid test counter coordination issues. It turns it back on once the children are done running.

Test::Fork will wait for all your child processes to complete at the end of the parent process.

SEE ALSO ^

Test::MultiFork

AUTHOR ^

Michael G Schwern <schwern@pobox.com>

BUGS and FEEDBACK ^

Please send all bugs and feature requests to bug-Test-Fork at rt.cpan.org or use the web interface via http://rt.cpan.org.

If you use it, please send feedback. I like getting feedback.

COPYRIGHT and LICENSE ^

Copyright 2007-2008 by Michael G Schwern <schwern@pobox.com>.

This program is free software; you can redistribute it and/or modify it under the same terms as Perl itself.

See http://www.perl.com/perl/misc/Artistic.html

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