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HasVersion(3)		       User Contributed Perl Documentation		    HasVersion(3)

       Test::HasVersion - Check Perl modules have version numbers

       "Test::HasVersion" lets you check a Perl module has a version number in a "Test::Simple"

	 use Test::HasVersion tests => 1;
	 pm_version_ok("M.pm", "Valid version");

       Module authors can include the following in a t/has_version.t file and let
       "Test::HasVersion" find and check all installable PM files in a distribution.

	 use Test::More;
	 eval "use Test::HasVersion";
	 plan skip_all =>
	      'Test::HasVersion required for testing for version numbers' if $@;

       Do you wanna check that every one of your Perl modules in a distribution has a version
       number? You wanna make sure you don't forget the brand new modules you just added?  Well,
       that's the module you have been looking for.  Use it!

       Do you wanna check someone else's distribution to make sure the author have not commited
       the sin of leaving Perl modules without a version that can be used to tell if you have
       this or that feature? "Test::HasVersion" is also for you, nasty little fellow.

       There's a script test_version which is installed with this distribution. You may invoke it
       from within the root directory of a distribution you just unpacked, and it will check
       every .pm file in the directory and under lib/ (if any).

	 $ test_version

       You may also provide directories and files as arguments.

	 $ test_version *.pm lib/ inc/
	 $ test_version .

       (Be warned that many Perl modules in a t/ directory do not receive versions because they
       are not used outside the distribution.)

       Ok. That's not a very useful module by now.  But it will be. Wait for the upcoming

       PRIVATE _pm_version
	     $v = _pm_version($pm);

	   Parses a PM file and return what it thinks is $VERSION in this file. (Actually
	   implemented with "use ExtUtils::MakeMaker; MM->parse_version($file)".)  $pm is the
	   filename (eg., lib/Data/Dumper.pm).

	     pm_version_ok('M.pm', 'Has valid version');

	   Checks to see if the given file has a valid version. Actually a valid version number
	   is defined and not equal to 'undef' (the string) which is return by "_pm_version" if a
	   version cannot be determined.


	   Checks every given file and .pm files found under given directories to see if they
	   provide valid version numbers. If no argument is given, it defaults to check every
	   file *.pm in the current directory and recurses under the lib/ directory (if it

	   If no test plan was setted, "Test::HasVersion" will set one after computing the number
	   of files to be tested. Otherwise, the plan is left untouched.

       PRIVATE _list_pm_files
	     @pm_files = _list_pm_files(@dirs);

	   Returns all PM files under the given directories.

	     @files = all_pm_files()
	     @files = all_pm_files(@files_and_dirs);

	   Implements finding the Perl modules according to the semantics of the previous
	   function "all_pm_version_ok".

       Other usage patterns besides the ones given in the synopsis.

	 use Test::More tests => $num_tests;
	 use Test::HasVersion;

       Obviously, you can't plan twice.

	 use Test::More;
	 use Test::HasVersion;
	 plan tests => $num_tests;

       "plan" comes from "Test::More".

	 use Test::More;
	 use Test::HasVersion;
	 plan 'no_plan';

       "no_plan" is ok either.


       Please reports bugs via CPAN RT, http://rt.cpan.org/NoAuth/Bugs.html?Dist=Test-HasVersion

       A. R. Ferreira, <ferreira@cpan.org>

       Copyright (C) 2006 by A. R. Ferreira

       This library is free software; you can redistribute it and/or modify it under the same
       terms as Perl itself.

perl v5.16.3				    2006-10-07				    HasVersion(3)
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