Oren Eini

aka Ayende Rahien

Oren Eini

CEO of RavenDB

a NoSQL Open Source Document Database

Get in touch with me:

oren@ravendb.net

+972 52-548-6969

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Deep Dive into RavenDB webinars

Oct 10 2004

Why I love TDD

time to read 2 min | 299 words

{I don't know if you've noticed, but half of my posts are rants against software doing stupid things :-), this post also started this way, but I decided that I'm too negative.}

Well, I just finished a major refactoring season that would've been impossible without Tests.
I just started writing this software, but already it has several thousands of lines.
I started this project without any design, so I broke so many roles that it's lucky that I'm headed for prison tomorrow, or else I would be there today :-D.

I run FxCop on the project, and it popped several dozens of recommendations, which I know I wouldn't have been able to implement, if I didn't have the tests.
I'd a similar project, about half a year ago, I tested FxCop then, and wanted to do good, but the effort of changing & changing the project was just too much work to do.

Now, with the aid of TDD & ReSharper, the work goes very smoothly, and I'm confident that at the end, I'll have a better code, that does {roughly} the same thing.

If you aren't into TDD yet, try it. The best part isn't when you see that all the tests passed.
The best part is when you make a single inoccent change {such as moving a file from one folder to another} and you suddenly see half your tests bomb, and you just knows that this bug would've slipped to production.

I just came from such a bug, I moved a resource file to another directory, and suddenly I started seeing a lot of failed tests. After a false start {I made a change in the resource fetching code as well}, I finally found it.

P.S:
Why changing the path of a resource also change it's name in the assembly? This is stupid.

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RECENT COMMENTS

Dmitry, Yes, but this is _known_ to be a 64 bits system - since we are allocating 3GB (not possible in 64 bits). Note t...

By Oren Eini on Answer: What does this code do?
That's why it is a good idea to compare the return value of `write` to the buffer size. "size_t" can be 32-bit on some system...

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There's a reason we miss `write_exact` and `read_exact` from the standard library. In fact, I am surprised the chunk is actua...

By Pyth0n on Challenge: What does this code do?
kpvleeuwen, I agree, unfortunately I don't have anyone to ask off the top of my head. Thanks, I fixed the headers.

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It could be interesting to reach out to storage firmware developers and ask what write patterns they think would be useful ex...

By kpvleeuwen on Performance discovery: IOPS vs. IOPS

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