Perl模块用法

我有环境变量PERL5LIB设置：

$env | grep PERL
PERL5LIB=/usr/local/lib/perl

如果我创建一个模块：$PERL5LIB / My / ModuleTest.pm

$./test.pl 
Can't locate object method "new" via package "My::ModuleTest" (perhaps you forgot to load "My::ModuleTest"?) at ./test.pl line 8.

test.pl：

#!/usr/bin/perl

use strict;
use warnings;
use My::ModuleTest;

my $test = new My::ModuleTest;
print $test->check;

ModuleTest.pm：

package ModuleTest;

use strict;
use warnings;

sub new {
        my $class = shift;
        my ($opts)= @_;
        my $self = {};
        $self->{test} = "Hello World";

        return bless $self,$class;
}
sub check {
        my $self = shift;
        my ($opts) = @_;

        return $self->{test};
}
1;

我想使用$PERL5LIB作为模块的库路径,将它们与安装目录隔离开来.

Perl @INC：

$perl -le 'print foreach @INC'
/usr/local/lib/perl
/usr/lib/perl5/site_perl/5.8.8/i386-linux-thread-multi
/usr/lib/perl5/site_perl/5.8.8
/usr/lib/perl5/site_perl
/usr/lib/perl5/vendor_perl/5.8.8/i386-linux-thread-multi
/usr/lib/perl5/vendor_perl/5.8.8
/usr/lib/perl5/vendor_perl
/usr/lib/perl5/5.8.8/i386-linux-thread-multi
/usr/lib/perl5/5.8.8
.