Chapter 7. Unit Testing the Web Tier
"If you don't like unit testing your product, most likely your customers won't like to test it either."
—Anonymous
Enterprise applications follow the N-tier architecture model to handle numerous nonfunctional concerns such as upgradability, scalability, and maintainability. The best design approach is to decouple the tiers from each other; this allows scaling out a tier without affecting another tier, or refactoring code in one tier without affecting the other tiers. Usually, any web application contains three tiers: presentation, business logic, and a database tier. This chapter deals with unit testing the web tier or presentation layer. The next chapters cover the application and database layers.
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