Cloud – Data Resources Web Apps Cloud Apps
Web Services are based on XML.
From UI we cannot understand the difference between web application and web services.
Orbit 2 WSDL1
Travelocity WSDL 2
Web Service Provider 2
WSDL 1 WSDL 2
UDDI – Registry having who provides what ticket.
Request and Response (Two way communication)
Web Services Consumer / Client App
SOAP – Simple Object access protocol
UDDI – Universal Description Discovery Integration It’s a company.
Orbits and Travelocity developers create WSDL and publish to UDDI. I.e. giving the access
rights for taking the service
Request and Response done using protocol known as SOAP XML based request and SOAP
XML based response.
WSDL – Web Services Definition Language; WSDL constructed using XML and Java by
Difference between HTTP and SOAP
Special wrappers for transferring web services
data (XML) over the internet.
SOAP messages are not easily blocked by the
The whole architecture is called as Service Oriented Architecture
Components of SOA
Web Service Provider
Web Service Consumer
Example of Web Services
Technology – Web Services
Architecture – SOA
XML vs HTML
HTML is presentation language – Static
For transferring data into to web – Dynamic
XML – allows dynamic content to be transferred.
XML allows custom tags but HTML has only pre-defined tags.
WSDL is a xml file with extension .wsdl
Service end points –Where actual services are deployed; Server is deployed
E.g.1 MathService – Add and Subtract.
E.g.2 Airline reservation system – operations are getTicketInfogetAirlineDetails etc.
E.g.3 TransferMoney – RegisterTransMoneyServ, TransferWithinBank, TransferOutisdeBank
Questions on Web Services messages
Check the websites of the projects and find the custom messages.
Test cases – 300
100 to 110 for each message
E.g. of BOA transfer money service;
SOAP message structure looks like –
Framework used – Spring
Types of Web Services
1) SOAP based web services. More popular.
2) RESTful Web Services. – Using HTTP protocol.
3) JMS Web Services.
HTTP – Messages – POST GET DELETE and PUT
Representational State Transfer
Well Formed XML Doc - Tags are missing.
Valid XML Doc
XML Schema Doc – Tells the structure of XML document.
Every XML document should confirm to a schema document.
Extension of Schema - .xsd
NOTE First validate the WSDL document using a Schema – Check whether Vaild or not.
You will be provided a schema file provided. Manually or using tools.
Attribute – Property of element or tag. <price fontcolor=”Blue”>
<xmlns: TransFunds =”https:BOAfinServTransMoney”>
<xmlns: TransFunds =”https:ChasetransService”>
Xmlns – Meaning of the tags are defined and the XML engine looks to the xmlns so that
Things asked in the interview
What is XML message?
<?xml version=”1.0” encoding=”UTF-8”?>>
Contains elements, nodes and tags
Elements nested inside each other.
Root node and child nodes.
What did you do in SOAP?
Application was following SOAP Architecture
Request and response message – Created lot of test cases based on different scenarios. Then I
created a test suite based on these test cases. Finally I ran this test suite.
Java – How can Idosome coding – Java Collection API –
List – ArrayList, LinkedList and Vector
Sets – TreeSet and Hashset
What is JUnit?
Test unit framework for performing unit tests and automation tests based on the test cases
It has annotations and methods like assert and verify.
What is XML?
Xml has tags and data. It gives structure to the data. It has a container and nodes inside it. The
element contains the corresponding data.
What are the three major role players?
Service provider, Registry, Consumer are three major role players
What are three major operations?
Publish, find and bind are major operations.
Why web services?
Web services are language independent. Interconnecting systems is easy.
Why XML in Web Service?
Advantage of being independent of data position; Due to presence of tags; Positions of nodes can
change within the container.
Where is web service deployed?
Web service is deployed in the web server.
What is SOA?
Service oriented architecture.
Eg. Shopping Portal = get product catalog, get price for product, add to cart, payment gateway;
Create a platform and make the operations/functions independent so that third party vendors can
build their application on top of the base.
Social Websites and Salesforce platform is extensible due to SOA;
What is in the messages?
XML contains tags and data
SOAP contains an envelop, header and body.
WSDL contains data types, messages and service ports.
UDDI = Yellow pages, public information = Common information. Universal business registries.
What is need of Service Oriented Architecture?
If you make interfaces generic. Then third party can add services in the interface – Eg. Shopping
cart. E.g. Secured Paypal gateway, Secured Credit Card gateway;
Testing a web service is as simple as testing a form.
What did you do in Web Services Testing in previous project?
In my previous project where I was handling web services like money transfer between banks;
In this web services, I created test cases for the SOAP Requests and responses by inserting
assertions and then testing them and created test suites and ran them.
Request consists of envelope header body inside message and response consist of header body
fault and message. Included various requests in a test suite and inserted assertions and then ran
them and verified. Payment gateway.
Other concepts o Web Services are = WSDL Service Provider like Paypal and service consumers
lie the client applications and UDDI where the service provider publishes and provides the rights
to access. The communication is done through SOAP protocol.
I used SoapUI Pro 4.5.1