For which type of object can GUnit tests be written?

GUnit tests are specifically designed to test Gosu classes within the Guidewire ecosystem. These tests help ensure that the business logic implemented in Gosu code behaves as expected. Writing tests for Gosu classes enables developers to execute unit tests on individual components of their application, facilitating quick identification of issues and validating functionality in isolation.

Entities, database tables, and external libraries typically involve different types of testing or tools. Entities represent the data structure in the Guidewire application, but they are usually tested through integration and functional tests rather than unit tests like GUnit. Similarly, database tables are more directly related to data storage and require a different approach to testing, often involving database setup and verification. External libraries, while they can be unit tested, would generally not use GUnit, as it is tailored specifically for testing Guidewire's own Gosu-coded components. Therefore, focusing on Gosu classes allows developers to use GUnit effectively to maintain robust and reliable application functionality.