perl t/04_simple.t

        $ perl t/04_simple.t 
        1..4
        ok 1 - '1' evaluates to true in Perl
        ok 2 - '0' evaluates to false in Perl
        ok 3 - '4' + '3' adds up to '7'
        ok 4 - Concatenated to 'Love is a many splendored thing'