1Net::Daemon::Test(3)  User Contributed Perl Documentation Net::Daemon::Test(3)
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NAME

6       Net::Daemon::Test - support functions for testing Net::Daemon servers
7

SYNOPSIS

9           # This is the server, stored in the file "servertask".
10           #
11           # Create a subclass of Net::Daemon::Test, which in turn is
12           # a subclass of Net::Daemon
13           use Net::Daemon::Test ();
14           package MyDaemon;
15           our @ISA = qw(Net::Daemon::Test);
16
17           sub Run {
18               # Overwrite this and other methods, as you like.
19           }
20
21           my $self = Net::Daemon->new(\%attr, \@options);
22           eval { $self->Bind() };
23           if ($@) {
24               die "Server cannot bind: $!";
25           }
26           eval { $self->Run() };
27           if ($@) {
28               die "Unexpected server termination: $@";
29           }
30
31
32           # This is the client, the real test script, note we call the
33           # "servertask" file below:
34           #
35           # Call the Child method to spawn a child. Don't forget to use
36           # the timeout option.
37           use Net::Daemon::Test ();
38
39           my($handle, $port) = eval {
40               Net::Daemon::Test->Child(5, # Number of subtests
41                                        'servertask', '--timeout', '20')
42           };
43           if ($@) {
44               print "not ok 1 $@\n";
45               exit 0;
46           }
47           print "ok 1\n";
48
49           # Real tests following here
50           ...
51
52           # Terminate the server
53           $handle->Terminate();
54

DESCRIPTION

56       This module is a frame for creating test scripts of Net::Daemon based
57       server packages, preferrably using Test::Harness, but that's your
58       choice.
59
60       A test consists of two parts: The client part and the server part.  The
61       test is executed by the child part which invokes the server part, by
62       spawning a child process and invoking an external Perl script.  (Of
63       course we woultn't need this external file with fork(), but that's the
64       best possibility to make the test scripts portable to Windows without
65       requiring threads in the test script.)
66
67       The server part is a usual Net::Daemon application, for example a
68       script like dbiproxy. The only difference is that it derives from
69       Net::Daemon::Test and not from Net::Daemon, the main difference is that
70       the Bind method attempts to allocate a port automatically. Once a port
71       is allocated, the number is stored in the file "ndtest.prt".
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73       After spawning the server process, the child will wait ten seconds
74       (hopefully sufficient) for the creation of ndtest.prt.
75

AVAILABLE METHODS

77   Server part
78       Options Adds an option --timeout to Net::Daemon: The server's Run
79               method will die after at most 20 seconds.
80
81       Bind    (Instance method) This is mainly the default Bind method, but
82               it attempts to find and allocate a free port in two ways: First
83               of all, it tries to call Bind with port 0, most systems will
84               automatically choose a port in that case. If that seems to
85               fail, ports 30000-30049 are tried. We hope, one of these will
86               succeed. :-)
87
88       Run     (Instance method) Overwrites the Net::Daemon's method by adding
89               a timeout.
90
91       sub Run ($) {
92           my $self = shift;
93           $self->Run(); }
94
95   Client part
96       Child   (Class method) Attempts to spawn a server process. The server
97               process is expected to create the file 'ndtest.prt' with the
98               port number.
99
100               The method returns a process handle and a port number. The
101               process handle offers a method Terminate that may later be used
102               to stop the server process.
103

105         Net::Daemon is Copyright (C) 1998, Jochen Wiedmann
106                                            Am Eisteich 9
107                                            72555 Metzingen
108                                            Germany
109
110                                            Phone: +49 7123 14887
111                                            Email: joe@ispsoft.de
112
113         All rights reserved.
114
115       You may distribute under the terms of either the GNU General Public
116       License or the Artistic License, as specified in the Perl README file.
117

SEE ALSO

119       Net::Daemon(3), Test::Harness(3)
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123perl v5.36.0                      2023-01-20              Net::Daemon::Test(3)
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