I've found this to absolutely be the case. I only started writing tests for code I was working on about 9 months ago, and I'm a believer. For code I've written tests for, I no longer dread re-opening it 3 months later. Happened this morning, in fact - I had to fix ambiguous behavior in a core module, and I knew the tests (not only of that module, but the entire system) would help protect me from doing something seriously bad.
Testing has worked wonders for me when it comes to API developement - especially when I know other people are going to have to work with the API I'm developing. Writing tests forces you to run your proposed API through its paces before anyone else takes a look at it. Maybe it's not tuned to race yet, but at least you'll know all the wheels are bolted on and the engine runs. :)
Check out Test Driven Development (amazon link) by Kent Beck. All the examples are in Java, but it's a good (fast) read on how to approach coding in this fashion - through heavy testing, coding, refactoring, and testing again.
As others have said, testing isn't a magic bullet. I view it kind of like safety rigging in construction work - you could get by without it, but would you really want to?
Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
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:
Outside of code tags, you may need to use entities for some characters:
- a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, 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, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
Link using PerlMonks shortcuts! What shortcuts can I use for linking?
See Writeup Formatting Tips and other pages linked from there for more info.
| & || & |
| < || < |
| > || > |
| [ || [ |
| ] || ] ||