SOA Testing KHAIS KHAN SATHEESH KUMAR PRABHAKARAN SUNDARAM

SOA Testing KHAIS KHAN / SATHEESH KUMAR / PRABHAKARAN SUNDARAM SOA Testing Core Team - Logistics Syntel Inc

SOA Overview

SOA Evolution Confidential © 2007 Syntel, Inc. 4

SOA Future Confidential © 2007 Syntel, Inc. 5

What is SOA? Ø Service-Oriented Architecture (SOA) is an architectural style. Ø Applications built using an SOA style deliver functionality as services that can be used or reused when building applications or integrating within the enterprise or trading partners. Ø SOA in other terms ü A service-oriented architecture is essentially a collection of services ü Services are based on heterogeneous technologies. ü Application functions are modularized and presented as services. ü A service is an implementation of a well-defined business functionality. ü Services are loosely coupled ü Service interface is independent of the implementation. Confidential © 2007 Syntel, Inc. 6

SOA Conti. . ü ü Services are platform independent, self describing interfaces (XML) Messages are formally defined Services have quality of service characteristics defined in policies Services can be provided on any platform Composable Interoperable SOA Re-Usable Loosely Coupled Confidential © 2007 Syntel, Inc. 7

SOA – An Overview In layman terms, Ø Taking Stock of what you have Ø Breaking it apart Ø Putting it back together in better ways In Business terms, Ø Break the business model into discrete business processes and functions Ø Identify the re-usable components that implement the business processes. Ø Identify the newer set of components that may be needed to implement improvements Ø Mix-n-Match the new and old components to create new (or alter current) processes to be more agile and flexible Ø Re-wire the components to build a loosely-coupled, flexible agile business model and its corresponding implementation. Confidential © 2007 Syntel, Inc. 8

NON SOA BASED FRAMEWORK Application Screen Scrape Sockets Download File Application Message Queue Application Sockets Application ORB Application Message Transaction Queue File Application Screen Scrape Application § RPC Application CICS Gateway Message ORB APPC Message Transaction File § § Transaction File Screen Scrape Transaction File CICS Gateway Application Screen Scrape Download File Message Queue APPC RPC Tightly integrated interfaces are difficult to change. The more interfaces the more complex the application: interface logic may exceed business logic. In such circumstances, re-use becomes difficult and impractical Confidential © 2007 Syntel, Inc. 9

Enterprise Service Bus § An Enterprise Service Bus (ESB) is a flexible connectivity infrastructure for integrating applications and services. § An ESB powers your SOA by reducing the number, size, and complexity of interfaces. Confidential © 2007 Syntel, Inc. 10

SOA and Webservices § SOA is not Webservices, but web services are the preferred standardsbased way to realize SOA. § Web services are software systems designed to support interoperable machine-to-machine interaction over a network. This interoperability is gained through a set of XML-based open standards, such as WSDL, SOAP, and UDDI. These standards provide a common approach for defining, publishing, and using web services. § Interoperability is the most important principle of SOA. This can be realized through the use of web services, as one of the key benefits of web services is interoperability, which allows different distributed web services to run on a variety of software platforms and hardware architectures. Confidential © 2007 Syntel, Inc. 11

Webservices basics Points to description UDDI Registry Points to service Finds Service Web Service Client SOAP (J 2 EE, . NET, PL/SQL …) Confidential © 2007 Syntel, Inc. WSDL Describes Service Web Service (J 2 EE, PL/SQL, . NET, C/C++, Legacy …) 12

SOA Testing – An End To End Approach

SOA Testing – An End To End Approach How SOA testing is different from testing of other applications Ø SOA implementations are a combination of web components, mid-tier components, back-end and legacy systems Ø Unlike traditional testing approaches, SOA testing approach should encompass all the aspects of business processes and also its integration framework Ø SOA Testing Strategy should not only focus on just the functionality or the front-end clients but also on the integration layers ØFollowing types of testing needs to be performed to ensure proper E 2 E testing ü Functionality ü Interoperability ü Performance ü Backward compatibility ü Security Confidential © 2007 Syntel, Inc. 14

SOA Testing – Challenges

SOA Testing Challenges Major Challenges: Ø No user interface for the services in SOA applications Ø Lack of visibility into loosely coupled business level services Ø Dependency on availability of any internal or external services that offers a business function to perform E 2 E testing Ø SOA initiative has thrown complexities in the integration framework that requires complete testing of business workflows across every heterogeneous technology layer of the SOA at both system and component level. This poses a challenge on testing methodologies. ØTest Coverage ü Client level validation ü Service level validation ü Multiple message format Confidential © 2007 Syntel, Inc. 16

SOA Testing Challenges Ø Test Automation ü Client Simulators (Message simulation) ü Service Simulators ü Automatic test data creation ü Choosing the right test automation tool Ø Maintaining pool of testing resources with SOA domain knowledge Confidential © 2007 Syntel, Inc. 17

SOA Test Automation Approach Traditional Testing Tools GUI Testing Approach In House Test Tools

SOA Test Automation Approach Traditional Testing Tools Ø Web Services SOAP requests needs to be generated manually or using a supported third party vendor testing tool Ø Integrating traditional functionality testing tool and other such third party tool is not feasible due to its nature and limitations Ø A mix of manual and automated process is an additional overhead Ø It’s a time consuming and expensive effort Confidential © 2007 Syntel, Inc. 19

SOA Test Automation Approach GUI Testing Approach Ø Web Service is UI less application. Ø GUI application should be developed Ø Web service interface changes demands often GUI changes Ø Web Services security testing that requires encrypted & singed data is not possible Ø Overall cost involved is very high for testing, development & maintenance efforts Confidential © 2007 Syntel, Inc. 20

SOA Test Automation Approach In House Test Tools Ø Focus is drawn towards developing & maintaining the test tools than the actual testing Ø In-house test tool itself need to undergo testing to ensure it is coded to the specifications Ø Dependency on in-house tools will impact test schedules & quality of the deliverable in demanding situations Ø Time Consuming and expensive approach Confidential © 2007 Syntel, Inc. 21

SOA Test Automation Approach Web Services Testing Tools Ø Provides robust, reliable, scalable and interoperable solution Ø Best fit for UI less testing Ø Provides a solution for load testing Ø Test data generation for any WSDL version is possible and easily maintainable. Ø Depending on existing legacy systems & back-end applications, web services test tools can be tweaked by developing / modifying test scripts to provide an E 2 E solution for backward compatibility Ø Unlike any other traditional testing tool, the cost involved is very minimal. Confidential © 2007 Syntel, Inc. 22

SOA Testing Tools - Recommended Technology Area Tools Operating System Linux, UNIX(AIX), Solaris 9, Windows XP Databases server Oracle, SQL Server, Sybase Web Server Apache Web Server, IIS, IBM Http Server , IBM Tivoli App Server BEA Weblogic 8. 1, IBM Websphere Application Server 5. 3, JBoss Testing Tools Mercury tools-Quick Test Professional, Quality Center, Mercury Load. Runner, Rational Robot Software Language Java J 2 EE Design Tool Rational Rose Data Modeling Tools ERWIN HTML Editor Macromedia Dreamweaver Automated Build Apache Ant 1. 6. 5 Version Management CVS, PVCS, MS VSS Frameworks Struts, Service Oriented Architecture Security Netegrity Site. Minder, Obelix, RSA Cleartrust Confidential © 2007 Syntel, Inc. 23