The test quadrant contains multiple types of tests. Unit testing and component testing focus on the basic units of code and the functionality of components; Performance and load testing evaluate system performance; Security testing ensures system security; Ability testing verifies the system's capabilities. Functional testing is conducted through example story testing, prototype simulation, and other methods to ensure that software functionality meets requirements. Different types of testing work together to comprehensively ensure software quality and enhance user experience.

This mind map, created using EdrawMind, explains the concept of test doubles in software testing. It categorizes test doubles into four types: Fake, Spies, Stubs, and Mocks. Each type is described with its specific use cases. Fakes are used when a full implementation is too complex or requires an external system. Spies track method invocations without altering behavior. Stubs provide consistent return values, and Mocks verify interactions with specific arguments. The diagram also provides a guide on choosing the right test double based on testing needs.