--- /dev/null
+require 5;
+ # Time-stamp: "2004-10-06 23:07:06 ADT"
+use strict;
+use Test;
+BEGIN { plan tests => 22 };
+BEGIN { ok 1 }
+use I18N::LangTags (':ALL');
+
+print "# Perl v$], I18N::LangTags v$I18N::LangTags::VERSION\n";
+print "# Loaded from ", $INC{'I18N/LangTags.pm'} || "??", "\n";
+
+ok lc locale2language_tag('en'), 'en';
+ok lc locale2language_tag('en_US'), 'en-us';
+ok lc locale2language_tag('en_US.ISO8859-1'), 'en-us';
+ok lc(locale2language_tag('C')||''), '';
+ok lc(locale2language_tag('POSIX')||''), '';
+
+
+ok lc locale2language_tag('eu_mt'), 'eu-mt';
+ok lc locale2language_tag('eu'), 'eu';
+ok lc locale2language_tag('it'), 'it';
+ok lc locale2language_tag('it_IT'), 'it-it';
+ok lc locale2language_tag('it_IT.utf8'), 'it-it';
+ok lc locale2language_tag('it_IT.utf8@euro'), 'it-it';
+ok lc locale2language_tag('it_IT@euro'), 'it-it';
+
+
+ok lc locale2language_tag('zh_CN.gb18030'), 'zh-cn';
+ok lc locale2language_tag('zh_CN.gbk'), 'zh-cn';
+ok lc locale2language_tag('zh_CN.utf8'), 'zh-cn';
+ok lc locale2language_tag('zh_HK'), 'zh-hk';
+ok lc locale2language_tag('zh_HK.utf8'), 'zh-hk';
+ok lc locale2language_tag('zh_TW'), 'zh-tw';
+ok lc locale2language_tag('zh_TW.euctw'), 'zh-tw';
+ok lc locale2language_tag('zh_TW.utf8'), 'zh-tw';
+
+print "# So there!\n";
+ok 1;