Optimization of Web Service Testing Task Assignment in Crowdtesting Environment

Crowdtesting has emerged as an attractive and economical testing paradigm that features testers from different countries,with various backgrounds and working conditions.Recent developments in crowdsourcing testing suggest that it is feasible to manage test populations and processes,but they are often outside the scope of standard testing theory.This paper explores how to allocate service-testing tasks to proper testers in an ever-changing crowdsourcing environment.We formalize it as an optimization problem with the objective to ensure the testing quality of the crowds,while considering influencing factors such as knowledge capability,the rewards,the network connections,and the geography and the skills required.To solve the proposed problem,we design a task assignment algorithm based on the Differential Evolution(DE)algorithm.Extensive experiments are conducted to evaluate the efficiency and effectiveness of the proposed algorithm in real and synthetic data,and the results show better performance compared with other heuristic-based algorithms.

Implementation Method of Non-Intrusive Monitoring Mechanism for Web Services Testing

In web services testing, accessing the interactive contents of measured Services and the information of service condition accurately are the key issues of system design and realization. A non-intrusive solution based on axis2 is presented to overcome the difficulty of the information retrieval in web service testing. It can be plugged in server side or client side freely to test pre-deployed or deployed web services. Moreover, it provides a monitoring interface and the corresponding subscription publication mechanism for users based on web services to support the quality assurance grounded on service-oriented architecture （SOA） application service.

A framework for interoperability of BPEL-based workflows

With the prevalence of service-oriented architecture （SOA）, web services have become the dominating technology to construct workflow systems. As a workflow is the composition of a series of interrelated web services which realize its activities, the interoperability of workflows can be treated as the composition of web services. To address it, a framework for interoperability of business process execution language （BPEL）-based workflows is presented, which can perform three phases, that is, transformation, eonformance test and execution. The core components of the framework are proposed, especially how these components promote interoperability. In particular, dynamic binding and re-composition of work-flows in terms of web service testing are presented. Besides, an example of business-to-business （B2B） collaboration is provided to illustrate how to perform composition and conformance test.