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Web service is defined by the W3C as "a software system designed to support interoperable machine-to-machine interaction over a network".
Web services are frequently just Web application programming interfaces (API) that can be accessed over a network, such as the Internet,
and executed on a remote system hosting the requested services.
Click image for a QuickTest web-service demonstration: 
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What are Web Services?
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Web services are application components |
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Web services communicate using open protocols |
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Web services are self-contained and self-describing |
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Web services can be discovered using UDDI |
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Web services can be used by other applications |
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XML is the basis for Web services |
How Does it Work?
XML provides a language which can be used between different platforms and programming languages and still express complex messages and functions.
The HTTP protocol is the most used Internet protocol. Web services platform elements are :
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SOAP (Simple Object Access Protocol) |
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UDDI (Universal Description, Discovery and Integration) |
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WSDL (Web Services Description Language) |
Interoperability has Highest Priority
When all major platforms could access the Web using Web browsers, different platforms could interact.
For these platforms to work together, Web-applications were developed.
Web-applications are simple applications that run on the web.
These are built around the Web browser standards and can be used by any browser on any platform.
Web Services take Web-applications to the Next Level
By using Web services, your application can publish its function or message to the rest of the world.
Web services use XML to code and to decode data, and SOAP to transport it (using open protocols).
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What is SOAP?
SOAP is an XML-based protocol to let applications exchange information over HTTP, or more simple: SOAP is a protocol for accessing a Web Service.
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SOAP stands for Simple Object Access Protocol |
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SOAP is a communication protocol |
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SOAP is a format for sending messages |
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SOAP is designed to communicate via Internet |
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SOAP is platform independent |
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SOAP is language independent |
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SOAP is based on XML |
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SOAP is simple and extensible |
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SOAP allows you to get around firewalls |
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is a W3C standard |
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What is WSDL?
WSDL is an XML-based language for locating and describing Web services.
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WSDL stands for Web Services Description Language |
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WSDL is based on XML |
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WSDL is used to describe Web services |
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WSDL is used to locate Web services |
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WSDL is a W3C standard |
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What is UDDI?
UDDI is a directory service where companies can register and search for Web services.
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UDDI stands for Universal Description, Discovery and Integration |
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UDDI is a directory for storing information about web services |
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UDDI is a directory of web service interfaces described by WSDL |
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UDDI communicates via SOAP |
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UDDI is built into the Microsoft .NET platform |
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Discussed Automation Topics
- Defining Web Service Test Settings.
- Defining Web Service Test Options.
- Considerations for Working with the Web Services Add-in.
- Specify WSDL for Scanning Screen.
- Understand WSDL general structure.
- Select Service Port and Operations.
- installing ws-i testing tool.
- Checking WSDL Meets WS-I Standards.
- Handling simple web-services.
- Handling complex web-services.
- Testing Web Services using static data.
- Parameterizing XML checkpoints.
- Parameterizing Web Services.
- Understand SOAP Response.
- Testing Web Services using dynamic data.
- Negative Testing of web services.
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