API (Application Programming Interface) Testing is a testing process performed to evaluate the functionality, reliability and performance of a software application's APIs. APIs are the basic building blocks that allow communication between software components, and therefore it is critical that they work correctly.
API Testing is important to ensure smooth communication between different components of software applications. This testing process improves the quality of software projects by detecting bugs, incompatibilities and performance problems of APIs in advance. Additionally, it saves time and costs by accelerating the development process.
API Testing is usually performed using automation tools. Tools such as Postman, SoapUI, and JUnit are often preferred to check whether APIs are working correctly and passing the specified test cases successfully. These tools have the ability to handle different situations of APIs, test error conditions, and perform performance measurements.
One of the important points to consider during API Testing is to perform security tests regularly. Security is of great importance as APIs can access sensitive data. Additionally, issues such as version control of APIs, documentation, and continuous testing integration should also be taken into account.