What does white box testing primarily focus on?

White box testing primarily focuses on examining the internal structures or workings of an application. This method involves a deep understanding of the code, its architecture, and the underlying logic that governs the application's behavior. By analyzing the internal components, testers can ensure that various paths through the code are executed, which helps in identifying hidden errors that might not be visible through external testing methods.

This technique typically employs a variety of testing methods, such as code coverage analysis, path testing, and loop testing, to scrutinize the application’s logic and control flow. It is particularly effective in identifying logical errors and vulnerabilities within the code, ensuring each part of the application works as intended and adheres to coding standards.

The focus on internal workings differentiates white box testing from other testing types that might prioritize user interface, functionality, or compatibility aspects of the application.