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Box Testing

Black Box Testing

Black box testing is a technique used to test a system/application's functionality without knowing the internal code base. This focuses on inputs and outputs to ensure a system behaves as expected.

You would use this type of testing for things like validating user interfaces and external functions. It is particularly useful when you do not have access to a function (like an external API).

White Box Testing

White box testing is a method used to test the structures/workings of an application as opposed to its functionality. A white box tester has access to all the internal code and can test the application at a much deeper level. White box testers can test things like internal algorithms and data structures.

This type of tester can be applied at the unit, integration, and system levels.

Gray Box Testing

Gray box testing is a combination of white box and black box, it takes a hybrid approach where the testers have limited knowledge of internal code, but enough to define test cases. Gray box testers are allowed all the documentation linked to the functions.


Published 2/4/2025