If you're asking about testing in general, then see Test::More. Just one recent simple example of many to be found online (many CPAN modules have test suites) is here (although in your case I assume you'd be importing the sub in from a module instead of defining it in the test file itself).

If your question is how to test this specific sub, then it'd be better if you could show the actual code, since this is obviously not it. If you're asking how to test the code with a "fake" database, then perhaps one of the modules Test::MockDBI or DBD::Mock could help (disclaimer: I haven't used them but I've seen them recommended).

In reply to Re: How do i Unit Test a subroutine by Anonymous Monk
in thread How do i Unit Test a subroutine by ejvar

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.