Unit and integration testing of modular cloud servicesUnit and integration testing of modular cloud services Πλήρης Δημοσίευση σε Συνέδριο Conference Full Paper 2018-05-112017enCloud computing and the future Internet concept highlight new requirements for the software engineering phases including testing and validation of modular web services. The major reason is because cloud applications are developed by services belonging to different providers, thus making software testing a really challenging issue. In this work, we propose a testing methodology that includes two fold testing actions, a unit testing of cloud service APIs following white and black box techniques and an integration testing strategy by identifying services that could interface with each other. In addition, we present the Elvior TestCast T3 (TTCN-3) testing tool for automation of use case testing. We demonstrate the results of the methodology when applied to different cloud services and we present a discussion of our conclusions for a real world use case, in which we applied this methodology.http://creativecommons.org/licenses/by/4.0/1116-112331st IEEE International Conference on Advanced Information Networking and ApplicationsProceedings - International Conference on Advanced Information Networking and Applications Sotiriadis Stelios Σωτηριαδης Στελιος Lehmets Andrus Petrakis Evripidis Πετρακης Ευριπιδης Bessis Nik Institute of Electrical and Electronics Engineers Cloud computing Cloud service testing Cloud services TestCast TTCN-3