White box testing is a software testing method in which the internal structure and implementation of the software being tested are known and used as the basis for designing the test cases. It involves testing the software at the code level and requires a deep understanding of the code and the design of the software. It is also known as glass box, transparent box, clear box, or structural testing.
Most testers have already had some experience with this box-testing at some point in their careers. Techniques like this are battling for existence in a world that is becoming increasingly agile-driven. Adopting agile approaches does not include putting off any tasks to meet the project effectively.