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COVERAGE-BASED TESTING FOR SERVICE LEVEL AGREEMENTS

ABSTRACT

A service-level agreement (SLA) is simply a document describing the level of service expected by a customer from a supplier, laying out the metrics by which that service is measured, and the remedies or penalties, if any, should the agreed-upon levels not be achieved. Usually, SLAs are between companies and external suppliers, but they may also be between two departments within a company.  Service Level Agreements (SLAs) are typically used to specify rules regarding the consumption of services that are agreed between the providers of the Service-Based Applications (SBAs) and their consumers. An SLA includes a list of terms that contain the guarantees that must be fulfilled during the provisioning and consumption of the services. Since the violation of such guarantees may lead to the application of potential penalties, it is important to assure that the SBA behaves as expected. In this article, we propose a proactive approach to test SLA-aware SBAs by means of identifying test requirements, which represent situations that are relevant to be tested. To address this issue, we define a four-valued logic that allows evaluating both the individual guarantee terms and their logical relationships. Grounded in this logic, we devise a test criterion based on the Modified Condition Decision Coverage (MCDC) in order to obtain a cost-effective set of test requirements from the structure of the SLA.

EXISTING SYSTEM	PROPOSED SYSTEM
EXISTING CONCEPT: - In a previous work we dealt with the identification of test requirements by means of analyzing the information contained in the individual guarantee terms. The joint drafting of SLAs, installation of measurement procedures and negotiation of SLAs are costly to both customers and providers. They could become more complex by means of establishing relationships between the terms or including information	PROPOSED CONCEPT: - We aim to provide a further step by means of considering the whole logical structure of the SLA. We devise a coverage-based criterion with the aim at obtaining a reduced but effective set of test requirements. The testing of the SLAs requires using such documents as the test basis so we need to somehow formalize the specification of the SLA in order to automate as much as possible the obtaining of tests
EXISTING TECHNIQUE:- WS-Agreement	PROPOSED ALGORITHM:-  All Compositor Algorithm
TECHNIQUE DEFINITION:- WS-Agreement is an XML based language pro-posed by the Open Grid Forum (OGF) that specifies a protocol for the establishment of agreements between two parties.	ALGORITHM DEFINITION:- All compositor, we check how the variation of a guarantee term evaluation affects the evaluation of the compositor while the rest of guarantee terms have been fulfilled.
DRAWBACKS:- There is a potential increase in bureaucracy and paperwork SLAs are an important measure of general overall performance, but there are some services where failure is critical.	ADVANTAGES:- Automation of the process that identifies the test requirements using the aforementioned criterion. To avoid the identification of non-feasible situations