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October 18, 2018
Here is a minimal list of the things that every software professional should be conversant with: • Design patterns. You ought to be able to describe all 24 patterns in the GOF book and have a working knowledge of many of the patterns in the POSA books. • Design principles. You should know the SOLID principles and have a good understanding of the component principles. • Methods. You should understand XP, Scrum, Lean, Kanban, Waterfall, Structured Analysis, and Structured Design. • Disciplines. You should practice TDD, Object-Oriented design, Structured Programming, Continuous Integration, and
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it’s not really extra work at all. Writing these tests is simply the work of specifying the system. Specifying at this level of detail is the only way we, as programmers, can know what “done” means. Specifying at this level of detail is the only way that the stakeholders can ensure that the system they are paying for really does what they need. And specifying at this level of detail is the only way to successfully automate the tests. So don’t look at these tests as extra work. Look at them as massive time and money savers.
Unit tests and acceptance tests are documents first, and tests second. Their primary purpose is to formally document the design, structure, and behavior of the system. The fact that they automatically verify the design, structure, and behavior that they specify is wildly useful, but the specification is their true purpose.