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.\" ========================================================================
.\"
.IX Title "Test::Fork 3"
.TH Test::Fork 3 "2008-10-15" "perl v5.36.1" "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"
Test::Fork \- test code which forks
.SH "SYNOPSIS"
.IX Header "SYNOPSIS"
.Vb 2
\& 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");
.Ve
.SH "DESCRIPTION"
.IX Header "DESCRIPTION"
\&\fB\s-1THIS IS ALPHA CODE\s0!\fR The implementation is unreliable and the interface
is subject to change.
.PP
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.
.SS "Functions"
.IX Subsection "Functions"
Each function is exported by default.
.PP
\fI\f(BIfork_ok\fI\fR
.IX Subsection "fork_ok"
.PP
.Vb 3
\& my $child_pid = fork_ok( $num_tests, sub {
\& ...child test code...
\& });
.Ve
.PP
Runs the given child test code in a forked process. Returns the pid of the
forked child process, or false if the fork fails.
.PP
\&\f(CW$num_tests\fR is the number of tests in your child test code.
Consider it to be a sub-plan.
.PP
\&\fBfork_ok()\fR itself is a test, if the fork fails it will fail. \fBfork_ok()\fR
test does not count towards your \f(CW$num_tests\fR.
.PP
.Vb 5
\& # This is three tests.
\& fork_ok( 2, sub {
\& is $foo, $bar;
\& ok Something\->method;
\& });
.Ve
.PP
The children are automatically reaped.
.SH "CAVEATS"
.IX Header "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.
.PP
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.
.PP
Test::Fork will wait for all your child processes to complete at the end of
the parent process.
.SH "SEE ALSO"
.IX Header "SEE ALSO"
Test::MultiFork
.SH "AUTHOR"
.IX Header "AUTHOR"
Michael G Schwern <schwern@pobox.com>
.SH "BUGS and FEEDBACK"
.IX Header "BUGS and FEEDBACK"
Please send all bugs and feature requests to
\&\fIbug-Test-Fork\fR at \fIrt.cpan.org\fR or use the web interface via
<http://rt.cpan.org>.
.PP
If you use it, please send feedback. I like getting feedback.
.SH "COPYRIGHT and LICENSE"
.IX Header "COPYRIGHT and LICENSE"
Copyright 2007\-2008 by Michael G Schwern <schwern@pobox.com>.
.PP
This program is free software; you can redistribute it and/or
modify it under the same terms as Perl itself.
.PP
See \fIhttp://www.perl.com/perl/misc/Artistic.html\fR