Unit Testing World Wind

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***TestDriven.NET ***TestDriven.NET
***MB.Unit ***MB.Unit
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**Automated Builds **Automated Builds
***Nant ***Nant

Revision as of 21:25, 15 April 2005

Unit Tetsing World Wind


I would like to float a proposal to start adding Unit Testing for any new features we add to World Wind. This isnt user or tester testing, unit tests is code and classes you add to a project to test that the code you write behaves as expected and can be tested and verified by automated tools. So if you check in changes a periodic build can build *and* test the code.

The pedantic form of writing tests is to write it *before* you write the actually code. I know it sounds odd, but think about it, you *have* thought through your classes and written some stuff down, you *do* know where you are gonna start, you *aren't* making it up as you go along are you? :) Writing tests before coding makes you stay honest with yourself.

  • Pros
    • Writing tests makes you think about what your code does and is it as simple as possible
    • Verifiable testing, CruiseControl.Net, Nant and many other tools can build and run the tests and give quick feedback about things that dont pass.
    • Regessions are (hopefully) spotted quickly
    • Produces better code.
  • Cons
    • Percieved increase in time it takes to write code. (Time spent answering questions and testing is not visible to developers)
    • Extra dependancy for the build.
    • Testing GUI is hard.
    • Separation of concerns is hard to start doing (Large event methods - see WorldWindow.cs - _OnMouseDown)


  • Tools
    • Unit Testing
      • TestDriven.NET
      • MB.Unit
    • Automated Builds
      • Nant
      • Cruise Control.Net













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