API testing

What are API tests?

API testing is a type of software testing used to test application programming interfaces (APIs) to ensure that they work as intended and meet the requirements of the system. 

As a reminder, that APIs are sets of functions and protocols that allow different software systems to communicate and exchange data with each other.

API testing typically involves sending requests to the API and verifying the returned response. This can include testing the returned data, status codes, and the structure and format of the response. API testing can also include tests of the API functionality, reliability, performance, and security while testing the various endpoints and parameters that can be passed to the API.

API testing can be performed at different levels, including unit testing (testing individual API components), integration testing (testing the integration of multiple APIs), and end-to-end testing (testing the entire API flow from start to finish). API tests can be done manually, or they can be automated using specialized tools such as Postman or SoapUI.

Testing APIs is an important part of the software development process, as APIs are the primary way different systems and components communicate and interact with each other. 

Ensuring that APIs function correctly and efficiently is critical to the overall stability and reliability of the system. API testing can help identify issues such as faulty or poorly designed APIs, performance bottlenecks, and security vulnerabilities, and ensure that the API meets user requirements and expectations.

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