Provided by: libconfig-model-tester-perl_2.047-1_all 
NAME
Config::Model::Tester - Test framework for Config::Model
VERSION
version 2.047
SYNOPSIS
# in t/model_test.t
use warnings;
use strict;
use Config::Model::Tester ;
use ExtUtils::testlib;
my $arg = shift || '';
my $test_only_model = shift || '';
my $do = shift ;
run_tests($arg, $test_only_model, $do) ;
DESCRIPTION
This class provides a way to test configuration models with tests files. This class was designed to
tests several models and several tests cases per model.
A specific layout for test files must be followed
Simple test file layout
t
|-- model_test.t
\-- model_tests.d
|-- lcdd-test-conf.pl # test specification
\-- lcdd-examples
|-- t0 # test case t0
\-- LCDD-0.5.5 # test case for older LCDproc
In the example above, we have 1 model to test: "lcdd" and 2 tests cases.
Test specification is written in "lcdd-test-conf.pl" file. Test cases are plain files in "lcdd-examples".
"lcdd-test-conf.pl" will contain instructions so that each file will be used as a "/etc/LCDd.conf" file
during each test case.
"lcdd-test-conf.pl" can contain specifications for more test case. Each test case will require a new file
in "lcdd-examples" directory.
See "Examples" for a link to the actual LCDproc model tests
Test file layout for multi-file configuration
When a configuration is spread over several files, test examples must be provided in sub-directories:
t/model_tests.d
\-- dpkg-test-conf.pl # test specification
\-- dpkg-examples
\-- libversion # example subdir
\-- debian # directory for one test case
|-- changelog
|-- compat
|-- control
|-- copyright
|-- rules
|-- source
| \-- format
\-- watch
In the example above, the test specification is written in "dpkg-test-conf.pl". Dpkg layout requires
several files per test case. "dpkg-test-conf.pl" will contain instruction so that each directory under
"dpkg-examples" will be used.
See "Examples" for a link to the (many) Dpkg model tests
Test file layout depending on system
t/model_tests.d/
|-- ssh-test-conf.pl
|-- ssh-examples
\-- basic
|-- system_ssh_config
\-- user_ssh_config
In this example, the layout of the configuration files depend on the system. For instance, system wide
"ssh_config" is stored in "/etc/ssh" on Linux, and directly in "/etc" on MacOS.
ssh-test-conf.pl <https://github.com/dod38fr/config-model-openssh/blob/master/t/model_tests.d/ssh-test-
conf.pl> will specify the target path of each file. I.e.:
$home_for_test = $^O eq 'darwin' ? '/Users/joe'
: '/home/joe' ;
# ...
setup => {
'system_ssh_config' => {
'darwin' => '/etc/ssh_config',
'default' => '/etc/ssh/ssh_config',
},
'user_ssh_config' => "$home_for_test/.ssh/config"
See the actual Ssh and Sshd model tests <https://github.com/dod38fr/config-model-
openssh/tree/master/t/model_tests.d>
Basic test specification
Each model test is specified in "<model>-test-conf.pl". This file contains a set of global variable.
(yes, global variables are often bad ideas in programs, but they are handy for tests):
# config file name (used to copy test case into test wr_root directory)
$conf_file_name = "fstab" ;
# config dir where to copy the file
#$conf_dir = "etc" ;
# home directory for this test
$home_for_test = '/home/joe' ;
Here, "t0" file will be copied in "wr_root/test-t0/etc/fstab".
# config model name to test
$model_to_test = "Fstab" ;
# list of tests
@tests = (
{
# test name
name => 't0',
# add optional specification here for t0 test
},
{
name => 't1',
# add optional specification here for t1 test
},
);
1; # to keep Perl happy
See actual fstab test <https://github.com/dod38fr/config-model/blob/master/t/model_tests.d/fstab-test-
conf.pl>.
Internal tests
Some tests will require the creation of a configuration class dedicated for test. This test class can be
created directly in the test specification by calling create_config_class on $model variable. See for
instance the layer test <https://github.com/dod38fr/config-model/blob/master/t/model_tests.d/layer-test-
conf.pl> or the test for shellvar backend <https://github.com/dod38fr/config-
model/blob/master/t/model_tests.d/backend-shellvar-test-conf.pl>.
Test specification with arbitrary file names
In some models (e.g. "Multistrap", the config file is chosen by the user. In this case, the file name
must be specified for each tests case:
$model_to_test = "Multistrap";
@tests = (
{
name => 'arm',
config_file => '/home/foo/my_arm.conf',
check => {},
},
);
See actual multistrap test <https://github.com/dod38fr/config-
model/blob/master/t/model_tests.d/multistrap-test-conf.pl>.
Test scenario
Each subtest follow a sequence explained below. Each step of this sequence may be altered by adding
specification in the test case:
• Setup test in "wr_root/<subtest name>/". If your configuration file layout depend on the target
system, you will have to specify the path using "setup" parameter:
setup => {
'file_name_in_examples_dir' => {
'darwin' => '/etc/foo', # macosx
'default' => '/etc/bar' # others
},
'another_file_in_examples_dir' => $computed_path
}
• Create configuration instance, load config data and check its validity. Use "load_check => 'no'" if
your file is not valid.
• Check for config data warning. You should pass the list of expected warnings. E.g.
load_warnings => [ qr/Missing/, (qr/deprecated/) x 3 , ],
Use an empty array_ref to masks load warnings.
• Optionally load configuration data. You should design this config data to suppress any error or
warning mentioned above. E.g:
load => 'binary:seaview Synopsis="multiplatform interface for sequence alignment"',
• Optionally, call apply_fixes:
apply_fix => 1,
• Call dump_tree to check the validity of the data. Use "dump_errors" if you expect issues:
dump_errors => [
# the issues the fix that will be applied
qr/mandatory/ => 'Files:"*" Copyright:0="(c) foobar"',
qr/mandatory/ => ' License:FOO text="foo bar" ! Files:"*" License short_name="FOO" '
],
• Likewise, specify any expected warnings (note the list must contain only "qr" stuff):
dump_warnings => [ (qr/deprecated/) x 3 ],
You can tolerate any dump warning this way:
dump_warnings => undef ,
• Run specific content check to verify that configuration data was retrieved correctly:
check => [
'fs:/proc fs_spec', "proc" ,
'fs:/proc fs_file', "/proc" ,
'fs:/home fs_file', "/home",
],
You can run check using different check modes (See "fetch( ... )" in Config::Model::Value) by passing
a hash ref instead of a scalar :
check => [
'sections:debian packages:0' , { qw/mode layered value dpkg-dev/},
''sections:base packages:0', { qw/mode layered value gcc-4.2-base/},
],
The whole hash content (except "value") is passed to grab and fetch
• Verify annotation extracted from the configuration file comments:
verify_annotation => {
'source Build-Depends' => "do NOT add libgtk2-perl to build-deps (see bug #554704)",
'source Maintainer' => "what a fine\nteam this one is",
},
• Write back the config data in "wr_root/<subtest name>/". Note that write back is forced, so the
tested configuration files are written back even if the configuration values were not changed during
the test.
You can skip warning when writing back with:
no_warnings => 1,
• Check the content of the written files(s) with Test::File::Contents. Tests can be grouped in an array
ref:
file_contents => {
"/home/foo/my_arm.conf" => "really big string" ,
"/home/bar/my_arm.conf" => [ "really big string" , "another"], ,
}
file_contents_like => {
"/home/foo/my_arm.conf" => [ qr/should be there/, qr/as well/ ] ,
}
file_contents_unlike => {
"/home/foo/my_arm.conf" => qr/should NOT be there/ ,
}
• Check added or removed configuration files. If you expect changes, specify a subref to alter the file
list:
file_check_sub => sub {
my $list_ref = shift ;
# file added during tests
push @$list_ref, "/debian/source/format" ;
};
• Copy all config data from "wr_root/<subtest name>/" to "wr_root/<subtest name>-w/". This steps is
necessary to check that configuration written back has the same content as the original
configuration.
• Create another configuration instance to read the conf file that was just copied (configuration data
is checked.)
• Compare data read from original data.
• Run specific content check on the written config file to verify that configuration data was written
and retrieved correctly:
wr_check => {
'fs:/proc fs_spec', "proc" ,
'fs:/proc fs_file', "/proc" ,
'fs:/home fs_file', "/home",
},
Like the "check" item explained above, you can run "wr_check" using different check modes.
running the test
Run all tests:
prove -l t/model_test.t
By default, all tests are run on all models.
You can pass arguments to "t/model_test.t":
• a bunch of letters. 't' to get test traces. 'e' to get stack trace in case of errors, 'l' to have
logs. All other letters are ignored. E.g.
# run with log and error traces
prove -lv t/model_test.t :: el
• The model name to tests. E.g.:
# run only fstab tests
prove -lv t/model_test.t :: x fstab
• The required subtest E.g.:
# run only fstab tests t0
prove -lv t/model_test.t :: x fstab t0
Examples
• LCDproc <http://lcdproc.org> has a single configuration file: "/etc/LCDd.conf". Here's LCDproc test
layout <https://github.com/dod38fr/config-model-lcdproc/tree/master/t/model_tests.d> and the test
specification <https://github.com/dod38fr/config-model-lcdproc/blob/master/t/model_tests.d/lcdd-test-
conf.pl>
• Dpkg packages are constructed from several files. These files are handled like configuration files by
Config::Model::Dpkg. The test layout <http://anonscm.debian.org/gitweb/?p=pkg-
perl/packages/libconfig-model-dpkg-perl.git;a=tree;f=t/model_tests.d;hb=HEAD> features test with
multiple file in dpkg-examples <http://anonscm.debian.org/gitweb/?p=pkg-perl/packages/libconfig-
model-dpkg-perl.git;a=tree;f=t/model_tests.d/dpkg-examples;hb=HEAD>. The test is specified in
dpkg-test-conf.pl <http://anonscm.debian.org/gitweb/?p=pkg-perl/packages/libconfig-model-dpkg-
perl.git;a=blob_plain;f=t/model_tests.d/dpkg-test-conf.pl;hb=HEAD>
• multistrap-test-conf.pl <https://github.com/dod38fr/config-
model/blob/master/t/model_tests.d/multistrap-test-conf.pl> amd multistrap-examples
<https://github.com/dod38fr/config-model/tree/master/t/model_tests.d/multistrap-examples> specify a
test where the configuration file name is not imposed by the application. The file name must then be
set in the test specification.
• backend-shellvar-test-conf.pl <https://github.com/dod38fr/config-
model/blob/master/t/model_tests.d/backend-shellvar-test-conf.pl> is a more complex example showing
how to test a backend. The test is done creating a dummy model within the test specification.
SEE ALSO
• Config::Model
• Test::More
AUTHOR
Dominique Dumont
COPYRIGHT AND LICENSE
This software is Copyright (c) 2013 by Dominique Dumont.
This is free software, licensed under:
The GNU Lesser General Public License, Version 2.1, February 1999
SUPPORT
Websites
The following websites have more information about this module, and may be of help to you. As always, in
addition to those websites please use your favorite search engine to discover more resources.
• MetaCPAN
A modern, open-source CPAN search engine, useful to view POD in HTML format.
<http://metacpan.org/release/Config-Model-Tester>
• Search CPAN
The default CPAN search engine, useful to view POD in HTML format.
<http://search.cpan.org/dist/Config-Model-Tester>
• RT: CPAN's Bug Tracker
The RT ( Request Tracker ) website is the default bug/issue tracking system for CPAN.
<http://rt.cpan.org/NoAuth/Bugs.html?Dist=Config-Model-Tester>
• AnnoCPAN
The AnnoCPAN is a website that allows community annotations of Perl module documentation.
<http://annocpan.org/dist/Config-Model-Tester>
• CPAN Ratings
The CPAN Ratings is a website that allows community ratings and reviews of Perl modules.
<http://cpanratings.perl.org/d/Config-Model-Tester>
• CPAN Forum
The CPAN Forum is a web forum for discussing Perl modules.
<http://cpanforum.com/dist/Config-Model-Tester>
• CPANTS
The CPANTS is a website that analyzes the Kwalitee ( code metrics ) of a distribution.
<http://cpants.perl.org/dist/overview/Config-Model-Tester>
• CPAN Testers
The CPAN Testers is a network of smokers who run automated tests on uploaded CPAN distributions.
<http://www.cpantesters.org/distro/C/Config-Model-Tester>
• CPAN Testers Matrix
The CPAN Testers Matrix is a website that provides a visual overview of the test results for a
distribution on various Perls/platforms.
<http://matrix.cpantesters.org/?dist=Config-Model-Tester>
• CPAN Testers Dependencies
The CPAN Testers Dependencies is a website that shows a chart of the test results of all dependencies
for a distribution.
<http://deps.cpantesters.org/?module=Config::Model::Tester>
Bugs / Feature Requests
Please report any bugs or feature requests by email to "bug-config-model-tester at rt.cpan.org", or
through the web interface at <http://rt.cpan.org/NoAuth/ReportBug.html?Queue=Config-Model-Tester>. You
will be automatically notified of any progress on the request by the system.
Source Code
The code is open to the world, and available for you to hack on. Please feel free to browse it and play
with it, or whatever. If you want to contribute patches, please send me a diff or prod me to pull from
your repository :)
<http://github.com/dod38fr/config-model-tester.git>
git clone git://github.com/dod38fr/config-model-tester.git
perl v5.18.1 2013-10-23 Config::Model::Tester(3pm)