Test Driven Modeling

For the last recipe in the book, I’d like to present a recipe that is central to my view of the integration of modeling and agile methods. The archetypal workflow in software agile methods is test-driven development (TDD), in which you do the following:

    Loop
        Write a test case
        Write a bit of code to meet that test case
        Apply test case
        If (defect) fix defect
    Until done

It’s an appealing story, to be sure. Each loop shouldn’t take more than a few minutes. This is a key means in agile methods to develop high-quality code: test incrementally throughout the coding process.

TDD aligns with this Law of Douglass:

The best way not to have defects in your system is to not put any defects into your system.

Law of Douglass #30

See https://www.bruce-douglass.com/geekosphere for further information.

This points out that it is far easier to develop high-quality systems...