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Net::Daemon::Test(3pm)User Contributed Perl DocumentatioNet::Daemon::Test(3pm)

       Net::Daemon::Test - support functions for testing Net::Daemon servers

           # This is the server, stored in the file "servertask".
           # Create a subclass of Net::Daemon::Test, which in turn is
           # a subclass of Net::Daemon
           use Net::Daemon::Test ();
           package MyDaemon;
           @MyDaemon::ISA = qw(Net::Daemon::Test);

           sub Run {
               # Overwrite this and other methods, as you like.

           my $self = Net::Daemon->new(\%attr, \@options);
           eval { $self->Bind() };
           if ($@) {
               die "Server cannot bind: $!";
           eval { $self->Run() };
           if ($@) {
               die "Unexpected server termination: $@";

           # This is the client, the real test script, note we call the
           # "servertask" file below:
           # Call the Child method to spawn a child. Don't forget to use
           # the timeout option.
           use Net::Daemon::Test ();

           my($handle, $port) = eval {
               Net::Daemon::Test->Child(5, # Number of subtests
                                        'servertask', '--timeout', '20')
           if ($@) {
               print "not ok 1 $@\n";
               exit 0;
           print "ok 1\n";

           # Real tests following here

           # Terminate the server

       This module is a frame for creating test scripts of Net::Daemon based
       server packages, preferrably using Test::Harness, but that's your

       A test consists of two parts: The client part and the server part.  The
       test is executed by the child part which invokes the server part, by
       spawning a child process and invoking an external Perl script.  (Of
       course we woultn't need this external file with fork(), but that's the
       best possibility to make the test scripts portable to Windows without
       requiring threads in the test script.)

       The server part is a usual Net::Daemon application, for example a
       script like dbiproxy. The only difference is that it derives from
       Net::Daemon::Test and not from Net::Daemon, the main difference is that
       the Bind method attempts to allocate a port automatically. Once a port
       is allocated, the number is stored in the file "ndtest.prt".

       After spawning the server process, the child will wait ten seconds
       (hopefully sufficient) for the creation of ndtest.prt.

       Server part

       Options Adds an option --timeout to Net::Daemon: The server's Run
               method will die after at most 20 seconds.

       Bind    (Instance method) This is mainly the default Bind method, but
               it attempts to find and allocate a free port in two ways: First
               of all, it tries to call Bind with port 0, most systems will
               automatically choose a port in that case. If that seems to
               fail, ports 30000-30049 are tried. We hope, one of these will
               succeed. :-)

       Run     (Instance method) Overwrites the Net::Daemon's method by adding
               a timeout.

       sub Run ($) {
           my $self = shift;
           $self->Run(); }

       Client part

       Child   (Class method) Attempts to spawn a server process. The server
               process is expected to create the file 'ndtest.prt' with the
               port number.

               The method returns a process handle and a port number. The pro-
               cess handle offers a method Terminate that may later be used to
               stop the server process.

         Net::Daemon is Copyright (C) 1998, Jochen Wiedmann
                                            Am Eisteich 9
                                            72555 Metzingen

                                            Phone: +49 7123 14887

         All rights reserved.

       You may distribute under the terms of either the GNU General Public
       License or the Artistic License, as specified in the Perl README file.

       Net::Daemon(3), Test::Harness(3)

perl v5.8.8                       2003-11-10            Net::Daemon::Test(3pm)

Time taken: 0.00070 seconds

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