package Net::Daemon::Test;
use strict;
require 5.004;
use Net::Daemon ();
use Symbol ();
use File::Basename ();
$Net::Daemon::Test::VERSION = '0.03';
@Net::Daemon::Test::ISA = qw(Net::Daemon);
=head1 NAME
Net::Daemon::Test - support functions for testing Net::Daemon servers
=head1 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
$handle->Terminate();
=head1 DESCRIPTION
This module is a frame for creating test scripts of Net::Daemon based
server packages, preferrably using Test::Harness, but that's your
choice.
A test consists of two parts: The client part and the server part.
The test is executed by the child part which invokes the server part,
by spawning a child process and invoking an external Perl script.
(Of course we woultn't need this external file with fork(), but that's
the best possibility to make the test scripts portable to Windows
without requiring threads in the test script.)
The server part is a usual Net::Daemon application, for example a script
like dbiproxy. The only difference is that it derives from
Net::Daemon::Test and not from Net::Daemon, the main difference is that
the B<Bind> method attempts to allocate a port automatically. Once a
port is allocated, the number is stored in the file "ndtest.prt".
After spawning the server process, the child will wait ten seconds
(hopefully sufficient) for the creation of ndtest.prt.
=head1 AVAILABLE METHODS
=head2 Server part
=over 8
=item Options
Adds an option B<--timeout> to Net::Daemon: The server's Run method
will die after at most 20 seconds.
=cut
sub Options ($) {
my $self = shift;
my $options = $self->SUPER::Options();
$options->{'timeout'} = {
'template' => 'timeout=i',
'description' => '--timeout <secs> '
. "The server will die if the test takes longer\n"
. ' than this number of seconds.'
};
$options;
}
=pod
=item Bind
(Instance method) This is mainly the default Bind method, but it attempts
to find and allocate a free port in two ways: First of all, it tries to
call Bind with port 0, most systems will automatically choose a port in
that case. If that seems to fail, ports 30000-30049 are tried. We
hope, one of these will succeed. :-)
=cut
sub Bind ($) {
my $self = shift;
my($port, $socket);
$self->{'proto'} ||= $self->{'localpath'} ? 'unix' : 'tcp';
if ($self->{'proto'} eq 'unix') {
$port = $self->{'localpath'} || die "Missing option: localpath";
$socket = eval {
IO::Socket::UNIX->new('Local' => $port,
'Listen' => $self->{'listen'} || 10);
}
} else {
my @socket_args =
( 'LocalAddr' => $self->{'localaddr'},
'LocalPort' => $self->{'localport'},
'Proto' => $self->{'proto'} || 'tcp',
'Listen' => $self->{'listen'} || 10,
'Reuse' => 1
);
$socket = eval { IO::Socket::INET->new(@socket_args) };
if ($socket) {
$port = $socket->sockport();
} else {
$port = 30049;
while (!$socket && $port++ < 30060) {
$socket = eval { IO::Socket::INET->new(@socket_args,
'LocalPort' => $port) };
}
}
}
if (!$socket) {
die "Cannot create socket: " . ($@ || $!);
}
my $fh = Symbol::gensym();
if (!open($fh, ">ndtest.prt") ||
!(print $fh $port) ||
!close($fh)) {
die "Error while creating 'ndtest.prt': $!";
}
$self->Debug("Created ndtest.prt with port $port\n");
$self->{'socket'} = $socket;
if (my $timeout = $self->{'timeout'}) {
eval { alarm $timeout };
}
$self->SUPER::Bind();
}
=pod
=item Run
(Instance method) Overwrites the Net::Daemon's method by adding a timeout.
=back
sub Run ($) {
my $self = shift;
$self->Run();
}
=head2 Client part
=over 8
=item 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 B<Terminate> that may later be used to stop the server
process.
=back
=cut
sub Child ($$@) {
my $self = shift; my $numTests = shift;
my($handle, $pid);
my $args = join(" ", @_);
print "Starting server: $args\n";
unlink 'ndtest.prt';
if ($args =~ /\-\-mode=(?:ithread|thread|single)/ && $^O =~ /mswin32/i) {
require Win32;
require Win32::Process;
my $proc = $_[0];
my $path;
my @pdirs;
File::Basename::fileparse_set_fstype("MSWin32");
if (File::Basename::basename($proc) !~ /\./) {
$proc .= ".exe";
}
if ($proc !~ /^\w\:\\/ && $proc !~ /^\\/) {
foreach my $dir (@pdirs = split(/;/, $ENV{'PATH'})) {
if (-x "$dir/$proc") {
$path = "$dir/$proc";
last;
}
}
if (!$path) {
print STDERR ("Cannot find $proc in the following"
, " directories:\n");
foreach my $dir (@pdirs) {
print STDERR " $dir\n";
}
print STDERR "Terminating.\n";
exit 1;
}
} else {
$path = $proc;
}
print "Starting process: proc = $path, args = ", join(" ", @_), "\n";
if (!&Win32::Process::Create($pid, $path,
join(" ", @_), 0,
Win32::Process::DETACHED_PROCESS(),
".")) {
die "Cannot create child process: "
. Win32::FormatMessage(Win32::GetLastError());
}
$handle = bless(\$pid, "Net::Daemon::Test::Win32");
} else {
$pid = eval { fork() };
if (defined($pid)) {
if (!$pid) {
exec @_;
}
$handle = bless(\$pid, "Net::Daemon::Test::Fork");
} else {
print "1..0\n";
exit 0;
}
}
print "1..$numTests\n" if defined($numTests);
for (my $secs = 20; $secs && ! -s 'ndtest.prt'; $secs -= sleep 1) {
}
if (! -s 'ndtest.prt') {
die "Server process didn't create a file 'ndtest.prt'.";
}
sleep 1;
my $fh = Symbol::gensym();
my $port;
if (!open($fh, "<ndtest.prt") ||
!defined($port = <$fh>)) {
die "Error while reading 'ndtest.prt': $!";
}
($handle, $port);
}
package Net::Daemon::Test::Fork;
sub Terminate ($) {
my $self = shift;
my $pid = $$self;
kill 'TERM', $pid;
}
package Net::Daemon::Test::Win32;
sub Terminate ($) {
my $self = shift;
my $pid = $$self;
$pid->Kill(0);
}
1;
=head1 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.
=head1 SEE ALSO
L<Net::Daemon(3)>, L<Test::Harness(3)>
=cut