The document discusses unit testing in APEX development projects. It notes that unit testing can help validate functionality at the unit level and ensure code quality, but that developers often find unit testing time-consuming. It then outlines some benefits of test-driven development and automated unit testing, such as having repeatable, expandable test cases that can run with the push of a button and provide reports. The document also introduces a PL/SQL unit testing framework that supports testing logic implemented in PL/SQL packages without tight coupling to APEX.