What is the difference between black-box testing and white-box testing?

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What is the difference between black-box testing and white-box testing?

Black-box testing and white-box testing are two different approaches to software testing.

Black-box testing focuses on testing the functionality of a software application without considering its internal structure or implementation details. Testers only have access to the inputs and outputs of the system and do not have knowledge of the internal code. This type of testing is based on the specifications and requirements of the software and aims to ensure that the application behaves as expected from a user's perspective.

White-box testing, on the other hand, is a testing technique that examines the internal structure and implementation of the software. Testers have access to the source code and are able to test individual components, functions, and algorithms. This type of testing is also known as structural or code-based testing and aims to ensure that the internal logic of the software is correct and all code paths are tested.

In summary, the main difference between black-box testing and white-box testing lies in the level of knowledge and access to the internal workings of the software. Black-box testing focuses on the external behavior and functionality, while white-box testing examines the internal structure and implementation.