unit testing

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BDD Crash Course Presentation

Last night 2 months of poking at my computer almost every evening ended with a room of 30 software professionals looking like the proverbial deer in the head lights. To be honest I was very concerned that I was being too basic and people would demand more in-depth details. I had a Linux build server all set up with source code repository, Hudson build services, a micro-development environment, and a handful of example projects ready to jump into once the questions / demands for details started.

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This section deals with tricks and techniques used to effectively test applications and services.

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Unit Testing Java

Basic testing patterns are important. But it is also important to properly plan the testing. Building a matrix really helps make sure you are covering all the basis.

A simple case is something that will compare two items for you. These little helper classes need to be built all the time for sorted lists and other such uses. However, it is amazingly easy to get something out of alignment. So for argument sake lets stick with something simple: "Compare two strings as being equal, allowing nulls to be used such that 2 nulls return true."

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How to Write 3v1L, Untestable Code

I always love a good laugh and this one is great. The developers and testers at Google have put up a great "How to Write 3v1L, Untestable Code" article with tongue in cheek and enough sarcasm to really tickle your thought processes. In reality is a list of things not to do as a developer. I love the reverse style delivery. You can find the complete post here: Google Testing Blog (http://googletesting.blogspot.com/2008/07/how-to-write-3v1l-untestable-c...).

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Behavior-Driven Development

I started poking at TDD (Test-Driven Development) a few years ago. I get really good at it, then I stop, then I get into again, then I stop and round and round I go.

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In Java how do you get a count of the open file handles?

I just did a code review on a change to a production service in Java which was having problems with left over open handles. Lets face it the change is so simple as to be ridiculous. We just added an explicit file.close() call.

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Script Based Unit Testing

== ShUnit ==

:Target: All POSIX (Linux/BSD/UNIX-like OSes)
:URL: http://shunit.sourceforge.net/
:Latest Version: 1.3 (15 Jan 2005)

:A unit testing framework for the Bourne shell family of shells modeled after JUnit. This has not been updated since 2005 and I think the project is defunct.

== shUnit2 ==

:Target: All POSIX (Linux/BSD/UNIX-like OSes)
:Latest Version: 2.1.1 (13 Jul 2007)
:URL: http://shunit2.sourceforge.net/
:Documentation: http://shunit2.svn.sourceforge.net/svnroot/shunit2/trunk/source/2.1/doc/...

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