First of all, welcome to the wonderful world of testing! I recently started writing tests for my modules, and I'm hooked. :-)

References you might find helpful:

• Perl Testing: A Developer's Notebook, by Ian Langworth and chromatic (ISBN 0596100922)
• Kent Beck's Test-Driven Development (ISBN 0321146530)
• Andy Lester's presentation on automated testing

Relevant nodes found by Super Search (this is one of your best friends at Perl Monks):

• Testing: Fun for the family
• testing code
• Functional and Unit Test Redundancy
• What is the best way to add tests to existing code?
• Testing at the right granularity

Finally, don't forget to search CPAN:

• Devel::Cover
• Test::Tutorial
• Test::Simple
• Test::More
• ...and other members of the Test::* namespace

Your specific example of a function that checks bounds is certainly something that I would test. It will allow you to easily verify that it is behaving as expected (per the specifications), especially after you tweak the code (anything from a minor change to a complete refactoring).

For example: Does the function handle different types of input appropriately? What should happen if it is passed undef? An integer? A float? Does it work with positive and negative values? An alphanumeric string? A string that contains with special characters? The empty string? What other edge cases are there?

Just some initial thoughts. Hope this helps.

---

---

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! —

• How do I compose an effective node title?
• How do I post a question effectively?
• Markup in the Monastery

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:
	&		&
	<		&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.