This is Perl module Test::Perl::Metrics::Simple.
INSTALLATION
Test::Perl::Metrics::Simple installation is straightforward. If your CPAN shell is set up,
you should just be able to do
    % cpan Test::Perl::Metrics::Simple
Download it, unpack it, then build it as per the usual:
    % perl Makefile.PL
    % make && make test
Then install it:
    % make install
DOCUMENTATION
Test::Perl::Metrics::Simple documentation is available as in POD. So you can do:
    % perldoc Test::Perl::Metrics::Simple
to read the documentation online with your favorite pager.
Seiki Koga