Advances in Web API testing: A Systematic Mapping Study

Web APIs serving as an intermediary for communication between distributed systems has increased recently. It has become critical to test these APIs to ensure their functionality and quality thoroughly. This study aims to systematically map the literature to analyze the techniques, methods, artifacts, and strategies employed during the testing phase of web APIs. Utilizing a systematic mapping study approach (SMS), we identified 42 studies that outlined various tests applicable to these APIs. Further, our analysis uncovered numerous methods, techniques, and strategies. Types of test artifacts such as the API specification, test cases, or test matrices were also found. Finally, testing activities were identified through approaches presented by each study’s authors, in which test results were applied and analyzed. The findings will establish the basis for the development of a testing guide, which in turn will support professionals who need to test APIs and who lack specific knowledge on how to carry out this activity due to the lack of standards.