V model in testing, DOT NET Programming

What is V model in testing?

The V model map's the type of test to the stage of development in the project.

1495_v model.png

Figure: - V Model

1) Unit Testing:

The Starting from the bottom to the first test level is "Unit Testing". It includes checking that each feature specified in the "Component Design" has been implemented in the component.

In the theory an independent tester should do this, but in practice the developer usually does it, since they are the only people who understand how a component works. The main problem with a component is that it performs only a small section of the functionality of a system, and it relies on co-operating with other parts of the system, that may not have been built yet. To overcome this, the developers either builds, or uses the special software to trick the component into believe it is working in a fully functional system.

2) Integration Testing:

As the components are constructed & tested they are then linked together to check if they work with each other. It is a fact that 2 components that have passed all their tests, if connected to each other produce one new component full of faults. These tests can be completed by developers, or by the specialists.

The Integration Testing is not focused on what the components are doing but on how they communicate with each other, as specified in "System Design". The "System Design" defines a relationship between all components.

The tests are organized to check that all the interfaces, until all the components have been built and interfaced to each other producing the entire system.

3) System Testing

Once the whole system has been built then it has to be tested against the "System Specification" to check if it delivers the features needed. It is still developer focused, although specialist developers termed as systems testers are generally employed to do it.

In the essence System Testing is not about checking the individual parts of the design, but about checking the system as a whole. In fact it is one of the giant components.

The System testing can include a number of specialist types of test to see if all the functional and non-functional requirements have been met. In addition to functional requirements these may involve the following types of testing for the non-functional requirements:

  • Performance - Are the performance criteria met?
  • Volume - Can large volumes of the information be handled?
  • Stress - Can peak volumes of the information be handled?
  • Documentation - Is the documentation usable for system?
  • Robustness - Does the system remain stable under adverse circumstances?

4) Acceptance Testing:

The Acceptance Testing checks the system against the "Requirements". It is same to systems testing in that the entire system is checked but the main difference is the change in focus:

The Systems testing checks that the system which was specified has been delivered. The Acceptance Testing checks that the system will deliver what was requested.

The customer must always do acceptance testing and not the developer. The customer always knows what is required from the system to achieve value in the business and is the only person qualified to make that judgment. The testing is more of getting the answer for whether the software delivered as defined by the customer. It is like getting a green flag from the customer that the software is up to the expectation and ready to be used.

Posted Date: 9/25/2012 1:39:13 AM | Location : United States

Related Discussions:- V model in testing, Assignment Help, Ask Question on V model in testing, Get Answer, Expert's Help, V model in testing Discussions

Write discussion on V model in testing
Your posts are moderated
Related Questions
Manifest Assembly metadata is always stored in the Manifest. Manifest consists of all metadata required to do the following things: 1) Version of assembly 2) Security ident

What are the various ways of authentication techniques in ASP.NET? The Selection of  an authentication provider is as simple as making an entry in  the web.config file of  the

What is "Common Type System" (CTS)?  CTS define all of the basic types that can be used  in the .NET Framework and the operations performed on those type. All this time we have

I want .Net Programmer for custom grid web application Need programmer to support in the development of an ASP .Net interface. Project will make extensive utilize of custom grid

What is DISCO? DISCO is a method developed by Microsoft to publish and discover Web services. It discovers URLs of all XML Web services located on a Web server and develops a

Design an interface and add code to command buttons using case statement, to find coursework to be calculated using formula 0.6*1/6*total Mark

What is the difference between Class and structure's? The main differences between them are as follows:- 1) The Structure is value types while classes are referen

What are the different types of triggers in SQl There are 2 types of triggers in the SQL server 2000 :- 1) INSTEAD OF triggers: The INSTEAD OF triggers fire in place of

How can we get the state of the requested process? XMLHttpRequest get the current state of the request operation by using the readyState property. This property checks the cond

How can you raise custom errors from stored procedure? The RAISERROR statements are  used to produce an ad hoc error message or to retrieve acustom message which is stored in t