Net::Daemon::Test(3pm)User Contributed Perl DocumentatioNet::Daemon::Test(3pm)NAMENet::Daemon::Test - support functions for testing Net::Daemon servers
SYNOPSIS
# 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
$handle->Terminate();
DESCRIPTION
This module is a frame for creating test scripts of Net::Daemon based
server packages, preferrably using Test::Harness, but that's your
choice.
A test consists of two parts: The client part and the server part. The
test is executed by the child part which invokes the server part, by
spawning a child process and invoking an external Perl script. (Of
course we woultn't need this external file with fork(), but that's the
best possibility to make the test scripts portable to Windows without
requiring threads in the test script.)
The server part is a usual Net::Daemon application, for example a
script like dbiproxy. The only difference is that it derives from
Net::Daemon::Test and not from Net::Daemon, the main difference is that
the Bind method attempts to allocate a port automatically. Once a port
is allocated, the number is stored in the file "ndtest.prt".
After spawning the server process, the child will wait ten seconds
(hopefully sufficient) for the creation of ndtest.prt.
AVAILABLE METHODS
Server part
Options Adds an option --timeout to Net::Daemon: The server's Run
method will die after at most 20 seconds.
Bind (Instance method) This is mainly the default Bind method, but
it attempts to find and allocate a free port in two ways: First
of all, it tries to call Bind with port 0, most systems will
automatically choose a port in that case. If that seems to
fail, ports 30000-30049 are tried. We hope, one of these will
succeed. :-)
Run (Instance method) Overwrites the Net::Daemon's method by adding
a timeout.
sub Run ($) {
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
process handle offers a method Terminate that may later be used
to stop the server process.
AUTHOR AND COPYRIGHT
Net::Daemon is Copyright (C) 1998, Jochen Wiedmann
Am Eisteich 9
72555 Metzingen
Germany
Phone: +49 7123 14887
Email: joe@ispsoft.de
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.
SEE ALSONet::Daemon(3), Test::Harness(3)perl v5.10.0 2007-05-23 Net::Daemon::Test(3pm)
