API Testing and Load Testing are two important types of testing in the software development process. Both are used to ensure the healthy functioning of applications, but there are significant differences in their purpose and focus.
API Testing is a type of testing that focuses on evaluating the proper functioning, data accuracy, and functionality of an application's APIs. On the other hand, Load Testing is a type of testing to measure the performance, endurance, and response times of an application under a certain load. While API Testing usually occurs at the unit level, Load Testing usually covers an entire application.
API Testing is especially important in situations where APIs need to work correctly and reliably. It is used to control the underlying structure of an application, even if users do not interact directly with it. On the other hand, Load Testing is often used in applications that experience large user traffic. For example, Load Testing is of great importance when e-commerce sites are preparing for busy periods such as Black Friday.
API Testing and Load Testing are two important types of testing that complement each other. While API Testing focuses on checking the core functionality of the application, Load Testing evaluates the performance of the application. When both types of testing are used together, it can be verified that the application is running on a solid foundation and performs smoothly even under heavy user traffic.