What aspect of the application do visual tests primarily focus on?

Visual tests primarily focus on the visual appearance and layout of an application. This type of testing ensures that the UI (user interface) is displayed correctly across different devices and screen sizes, and that it adheres to the design specifications. By verifying that elements like buttons, text, images, and overall layout are as expected, visual testing helps maintain a consistent user experience.

In contrast, other aspects such as application performance, user authentication processes, and database interactions deal with functionality and backend processes rather than how the application looks to the end user. Performance testing focuses on the response times and performance metrics, user authentication checks the security and access measures, and database interactions involve the data flow and storage mechanisms. Visual testing stands apart as it specifically ensures that the aesthetic and design elements are correctly rendered, which is vital for user satisfaction and engagement.