Don't mix and match Test::More with print "ok". 

use Test::More tests => 4;
BEGIN { use_ok('Mytest') }
ok( Mytest::is_even(0) == 1 );
ok( Mytest::is_even(1) == 0 );
ok( Mytest::is_even(2) == 1 );

[download]

In detail: 

>type !.pl
use Test::More tests => 4;
BEGIN { use_ok('Mytest') }
print &Mytest::is_even(0) == 1 ? "ok 2" : "not ok 2", "\n";
print &Mytest::is_even(1) == 0 ? "ok 3" : "not ok 3", "\n";
print &Mytest::is_even(2) == 1 ? "ok 4" : "not ok 4", "\n";

>perl !.pl
1..4
ok 1 - use Mytest;
ok 2
ok 3
ok 4
# Looks like you planned 4 tests but only ran 1.

>type @.pl
use Test::More tests => 4;
BEGIN { use_ok('Mytest') }
ok( Mytest::is_even(0) == 1 );
ok( Mytest::is_even(1) == 0 );
ok( Mytest::is_even(2) == 1 );

>perl @.pl
1..4
ok 1 - use Mytest;
ok 2
ok 3
ok 4

[download]

In reply to Re: Testing a XS module by ikegami
in thread Testing a XS module by technojosh

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post, it's "PerlMonks-approved HTML":


  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
  • Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
  • Read Where should I post X? if you're not absolutely sure you're posting in the right place.
  • Please read these before you post! —
  • Posts may use any of the Perl Monks Approved HTML tags:
    a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.